Push-Pull BJT Slayer Exciter

[lobster]

What do you guys think about replacing R3 and R6 with 1 watt, 1.65K ohm resistors? I want to ensure I don't break my 3A total circuit envelope and I don't want to run close to it. These would be increased from the 1K ohm resistors currently shown in the graphics I recently uploaded.

[EggertEnjoyer123]

How is this circuit supposed to work if the PNP emitter is connected to 0V, and the PNP collector is connected to Vcc?

Why are you bypassing the base of each transistor with diodes?

Why is the secondary coil basically shorted out? (I'm assuming that's the 47uH).

[MariuszD]

Can you give a reason why you connected the circled components like this?
Each one is incorrectly connected or has a bad value or does not perform any significant function.
In electronics, everything must make sense. There must be a logical reason for using each component.

Human with insufficient knowledge may make mistakes, but he cannot create complete nonsense. There are no limits to the level of nonsense that AI can create. Humans have limits. That's why I know this is the work of AI. For now, AI is unable to create a working circuit, you have to learn on your own.

First step of learning electronics is to learn how components work. The second step is to understand how simple correct schematics work. Next it is to modify it. Creating from scratch is for advanced practitioners.

My advice for you take simple CCFL inverter and try to understand it, read about it, learn how it works, learn how to chose components. Build such a circuit, connect the oscilloscope, do a simulation. You can add some components when you know something is working suboptimally and you have an idea how to improve it.

[MariuszD]

Another great circuit for you is Mazzilli's flyback driver. Build it, make some sparks, measure it, modify it. Have fun. Be careful with high voltages. Don't waste your time for AI.

Circuits like this make huge RFI. Big spark is like EMP. You can brick other devices by that.  Make it simple, no USB, no other connections, no long wires nearby. Use simple and cheap power supply. Many SMPS's cannot work properly with this level RFI. They can break or turn off.  Keep other electronic devices far away from your high voltages/arcs.

[Analog Kid]

How many turns on the secondary?

[SteveThackery]

Here it is at 1/4 the prior resolution. Let me know if this works, please.

Wow, that looks complicated. But you designed it, so could you be kind enough to walk us through the circuit, explaining how it works?

[lobster]

Addressing the questions in reverse order, the 47uH is not the secondary. The secondary connects to the terminal block where mentioned in red on the schematic. The diodes are intended to limit reverse voltage across base-emitter. I need to check on the PNP connections as you're right; polarity looks reversed.

How is this circuit supposed to work if the PNP emitter is connected to 0V, and the PNP collector is connected to Vcc?

Why are you bypassing the base of each transistor with diodes?

Why is the secondary coil basically shorted out? (I'm assuming that's the 47uH).

[lobster]

Roughly 1100.

How many turns on the secondary?

[lobster]

Thank you for replying. While I appreciate your ongoing conviction in that AI designed the circuit, as was mentioned before, AI was used to assist with formatting my BOM, not designing the circuit. While I am happy to address the function of any particular component, you circled a substantial number of components and it is unclear whether your concern with any individual component is its intended function or its rated value. If you would please advise which concern applies to which circled component, I can reply accordingly. It is entirely possible I may have goofed on a value but it is far less likely components were included without any intended function just for giggles. I'm far from perfect but everything was added for a specific reason.

Can you give a reason why you connected the circled components like this?
Each one is incorrectly connected or has a bad value or does not perform any significant function... I know this is the work of AI.

[lobster]

Yes, most definitely. I spent a ton of time reworking the schematic based upon the concerns raised here. Power can be applied via either 20V USB-C (subject to a 3.15A slow blow fuse given the IC is rated to a max of 3A) or 24V barrel conector (5A slow blow fused). Schottky diodes protect both inputs and prevent the barrel connector from backflowing to USB. There are test points wired to the USB-C IC to allow for programming the IC to negotiate 20V instead of the default 5V. A switch cuts power to the circuit at the far end of the power supply portion (toward the top center of the schematic).

For the LED section, a set value resistor as well as a potentiometer have been added to limit voltage to the LED and allow for brightness adjustment. There is a wiper cap there, too, to smooth adjustment.

There are two 4-pin fan headers which have a toggle switch (same part number as other switches) to power on/off. I may not use these but they are intended to allow for one fan to cool the TO-220 package transistors and another to cool the TO-220 package diodes.

A switch controls power to the transistor / oscillating circuitry (where I have been struggling). This section can be powered on regardless of whether the fan headers have power. Neither is reliant upon the other being in a particular power state in order to function. My intention was to have one transistor power on as the other powers off and vice versa. Resistors were added to limit current to the transistors to stay within a 3A total circuit power envelope. Beyond the set value resistors, potentiometers (lower resistance than the one used with the LED but same style) allow increasing resistance to each of the transistors individually to aid in tuning.

Throughout the circuit, a number of diodes, capacitors, and inductors have been added for a variety of reasons, ranging from smoothing power to decoupling to protecting the IC from transients.

I can address any of the specific components to advise why they were added where they were added if you wish.

Wow, that looks complicated. But you designed it, so could you be kind enough to walk us through the circuit, explaining how it works?

[lobster]

I fixed the connections to Q1. Thanks, EggertEnjoyer123, for picking up on the base and emitter being flipped for Q1 in the prior revision. Please see the updated schematic and latest BOM attached. I am truly hoping I am on the right path here.

Item   Quantity   Designator   Manufacturer_Name   Manufacturer_Part_Number   Description   Footprint
1   2   C1, C2   EPCOS - TDK Electronics   B32526R0107K000   CAP FILM 100UF 10% 63VDC RADIAL   CAP_B32526R0107K000
2   3   C3, C8, C11   Panasonic   ECW-FD2J104J4   CAP FILM 0.1UF 5% 630VDC RADIAL   ECW-FD2J104J
3   4   C4, C7, C12, C13   TDK Corporation   CGA5L4NP02J103G160AA   10000 pF ±20% 630V Ceramic Capacitor C0G, NP0 1206 (3216 Metric)   C1206
4   1   C5   Samsung Electro-Mechanics   CL32E106KBVVPOE   Multilayer Ceramic Capacitors MLCC - SMD/SMT 10uF X8L 50V 1210 Auto grade   C1210
5   3   C6, C9, C10   TDK   C3216X7R1H105K160AE   CAP CER 1UF 50V X7R 1206   C1206
6   2   D1, D2   Rohm Semiconductor   RB088T-30HZC9   Diode Array 1 Pair Common Cathode 30 V 5A Through Hole TO-220-3 Full Pack   TO-220-3
7   4   D3, D4, D7, D8   onsemi   FDLL3595   DIODE STANDARD 125V 200MA SOD80   SOD-80
8   2   D5, D6   Diotec Semiconductor   3EZ62   DIODE ZENER 62V 3W DO204AC   DO-204AC (DO-15)
9   1   F1   Littelfuse Inc.   0618005.MXP   FUSE GLASS 5A 250VAC 5X20MM   0618005.MXP
10   4   HS1, HS2, HS3, HS4   Wakefield Thermal   OMNI-UNI-34-50   HEATSINK TO-247 TO-264 TO-220   OMNI-UNI-34-50
11   1   J1   Switchcraft Inc.   L721RAHLP   LOW PROFILE RAPC MOUNT DC POWER   L721RAHLP
12   2   J2, J3   Molex   47053-3000   Connector Header Through Hole 4 position 0.100" (2.54mm)   47053-3000
13   2   J5, J6   Phoenix Contact   1714971   2 Position Wire to Board Terminal Block Horizontal with Board 0.375" (9.53mm) Through Hole   PHOENIX_1714971
14   3   L1, L2, L3   Bel Signal   HTTI-47-5.6   47 µH Shielded Toroidal Inductor 5.6 A 36mOhm Max Vertical, No Base, 2 PC Pin   IND_HTTI-47-5.6
15   1   LED1   ams OSRAM   KB DELPS2.12-QHRI-24-Z555-10-S   Blue 466nm LED Indication - Discrete 2.95V 2-SMD, Flat Leads   LED_SMD
16   1   Q1   onsemi   2SA2210-1E   TRANS PNP 50V 20A TO-220F-3SG   TO-220-3-PNP
17   1   Q2   onsemi   2SC6082-1E   TRANS NPN 50V 15A TO-220F-3SG   TO-220-3-NPN
18   1   R1   Bourns   PCW1D-B16-KAB103L   Potentiometers 10K 20% Sq 22mm Single Turn   Res_Pot
19   1   R2   Rohm Semiconductor   SDR03EZPJ222   RES SMD 2.2 KOHM 5% 0.3W 0603   R0603
20   2   R3, R6   KOA Speer Electronics, Inc.   RK73H3ATTE1651F   Thick Film Resistors - SMD 1.65K OHM 1%   R2512
21   2   R4, R11   Bourns   PCW1J-R24-KAB252L   POT 2.5K OHM 3/4W PLASTIC LINEAR   Res_Pot
22   2   R5, R7   IRC / TT Electronics   W22R120JRLF   Wirewound Resistors - Through Hole 0.12ohm 7watt 5%   W22R120JRLF_axial_22mmx0.8mm
23   2   R8, R12   KOA Speer Electronics, Inc.   RK73H1JTTD1002F   RES 10K OHM 1% 1/10W 0603   R0603
24   2   R9, R10   KOA Speer Electronics, Inc.   RN73H2ATTD1002A05   RES 10K OHM 0.05% 1/8W 0805   R0805
25   1   R13   Vishay   TNPW12061M00BYEA   RES 1M OHM 0.1% 0.52W 1206   R1206
26   1   R14   Vishay Sfernice   P2TC2010D1001LNTA   P2TC2010 2PPM/C 1K 0,01% N TA   R2010
27   3   SW1, SW2, SW3   NKK   MN11SS1W03   Single-Pole, Single-Throw Switch   SWITCH_MN11SS1W03
28   11   TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11   Keystone Electronics   5198TR   PC TEST POINT MINIATURE GRAY   KEYSTONE_5198TR
29   3   TVS1, TVS2, TVS3   Texas Instruments   TVS2701DRBR   27-V bidirectional flat-clamp surge protection device   VSON-8
30   1   U1   STMicroelectronics   STUSB4500QTR   USB Controller USB 2.0 I2C Interface 24-QFN (4x4)   USB_C_IC_VFQFN-24
31   1   USB_CONN   Amphenol ICC (Commercial Products)   124019282112A   USB TYPE C, RECEPTACLE, TOP MOUN   USB_C_124019282112A
32   1   F2   Littelfuse Inc.   06183.15MXP   FUSE GLASS 3.15A 250VAC 5X20MM   
33   2      Schurter   31.8275   Fuse Holder OGN-SMD Fuseholder 5x20   

[SteveThackery]

Why have you doubled up D3 and D4 with D7 and D8?

Aren't D4 and D8 upside down?

PS: Am I the only one who finds the schematic virtually impossible to follow?

[MariuszD]

If you would please advise which concern applies to which circled component, I can reply accordingly. It is entirely possible I may have goofed on a value but it is far less likely components were included without any intended function just for giggles. I'm far from perfect but everything was added for a specific reason.

This will flood your thread with many questions.

Errors and nonsense in first half of the "oscillator"schematic:

1-  why diode is shunting BE? Why you want to divide the current? how you suppose to control this division (it is temperature dependent)
2- why there are two diodes?
3- why diode is shorting CE of the transistor. Transistor will never have a chance to cut of the current.
4- capacitor 100nF parallel to 0,12Ohm can change impedance over 13MHz irrelevant for this circuit
5- R13 parallel to R14 does nothing
6- this filter cuts off over 100Hz. What is your expected oscillation frequency? Why you want to slow down the switching?
7- why potentiometer wiper is connected to the signal source (backwards)
8- why snubber is connected parallel to the resistor of the filter. Resistor in snubber has 6 times more resistance so it will do nothing
9- another resistor that is in fact parallel to R14 and does nothing.

There are more important errors like Q1 connected to V_sys. I suppose that you don't know what you are doing. In that case discussion about the details will be meaningless.  I want you to draw simplified block diagram. Only most important connections, transistors, coils, power supplies. Example in the attachment.

For the LED section, a set value resistor as well as a potentiometer have been added to limit voltage to the LED and allow for brightness adjustment. There is a wiper cap there, too, to smooth adjustment

You are fixating on non important things. Oscillator is most important. If oscillator doesn't work whole device doesn’t work.
Have you seen need to adjust the brightness of the power on led?
Have you seen such a circuit where regulation not being smooth?
"smoothing" capacitor gives about 10us time constant. Is your eye 1000 times faster than average human eye? Are you a cyborg?

Resistors were added to limit current to the transistors to stay within a 3A total circuit power envelope.

How do you calculated it? (it is wrong)  In power oscillator resistor is not good limiter it will waste a lot of energy. Popular solution is small resistor with transistor or comparator connected to the power transistor. Don't do it now, do it when all circuit will be correct.

Throughout the circuit, a number of diodes, capacitors, and inductors have been added for a variety of reasons, ranging from smoothing power to decoupling to protecting the IC from transients.

Throw it away. When something is difficult, try easy way, keep only most important elements.


If you are not using AI you are using similar method like throwing a dice.

[lobster]

Steve, thanks for your reply.

They were doubled up solely for redundancy. Is that crazy?

Yes, D4 and D8 are upside down. That's 100% an error I will fix.

Why have you doubled up D3 and D4 with D7 and D8?

Aren't D4 and D8 upside down?

PS: Am I the only one who finds the schematic virtually impossible to follow?

[MariuszD]

They were doubled up solely for redundancy. Is that crazy?

In this place redundancy is unreasonable. Redundancy is expected to improve reliability. This diode is not conducting significant currents or voltages. It is not expected to fail on its own. Transistor is hundred times prone to failure. Why there is no redundancy there? Transistor fail making short circuit so parallel connection is useless.

I have listed 9 errors of nonsense you answered two of them

[lobster]

Marius,

Based on multiple commenters mentioning the diode redundancy, I am going to go ahead and remove one for each transistor.

I have not had a chance to spend time to go through your concerns yet. I don't want to shortchange you with an overly short reply. Please allow me a bit of time to go through these items (as I am doing so on breaks during the workday).

Thanks!

I have listed 9 errors of nonsense you answered two of them

[MariuszD]

Add to the list:
10-  where do this current expected to flow?  from V_sys to V_sys?
11 - why is base connected to  V_sys?
12 - in previous version Q1 base current will flow all the time so transistor is turned on all the time. Is it on purpose?
13-  how do you want to adjust R1 and R4? Two potentiometers for one winding. How do yo know that there is need for adjust R1?
How do yo know that there is need for adjust R4 but not R1?

[lobster]

Thank you! I am still going through and cleaning up the schematic based upon your prior comments. Please give me a little more time to consider all of your comments and observations. I really appreciate it!!!

Add to the list:
10-  where do this current expected to flow?  from V_sys to V_sys?
11 - why is base connected to  V_sys?
12 - in previous version Q1 base current will flow all the time so transistor is turned on all the time. Is it on purpose?
13-  how do you want to adjust R1 and R4? Two potentiometers for one winding. How do yo know that there is need for adjust R1?
How do yo know that there is need for adjust R4 but not R1?

[UnijunctionTransistor]

This is my first post here so please go easy on me.

I will go easy on you. Easy, respectfully but also firmly, I would suggest for you to assemble the proven original Slayer circuit first, and fully understand why and how it operates. If you can't build it, at the very least simulate it with LTSpice. Most and foremost, understand the feedback mechanism which makes it to oscillate.

Once you have understood its operation, then and only then attempt something more complicated. Right now, it seems that you are only throwing components haphazardly into a schematic, without much thought or knowledge. All of your posted circuits so far, have fatal flaws in the power section, which appears you fail to grasp. Those have been addressed earlier and will not repeat them here.

[lobster]

Marius,

Thank you so much for your detailed feedback and comments. I really appreciate it as it helps me understand where to focus my efforts.

I made a slew of changes thanks to your feedback...

1-  why diode is shunting BE? Why you want to divide the current? how you suppose to control this division (it is temperature dependent)
I had originally included them to protect from reverse voltage spikes. From your question and other Slayer designs, it appears this is not necessary to include. I'm going to remove them altogether.

2- why there are two diodes?
Addressed in prior reply. I removed one as this was thought to add redundancy. As mentioned in 1, above, I'm just going to remove them altogether.

3- why diode is shorting CE of the transistor. Transistor will never have a chance to cut of the current.

It shouldn't be but it is. I need to remove it as it was an error to have included it. I am removing both D5 and D6.

4- capacitor 100nF parallel to 0,12Ohm can change impedance over 13MHz irrelevant for this circuit
Spot on. I am removing it. It doesn't seem likely to help.

5- R13 parallel to R14 does nothing
R14 has been removed. Thanks!

6- this filter cuts off over 100Hz. What is your expected oscillation frequency? Why you want to slow down the switching?
Was ballparking around 250 kHz. I am going to remove C10. Good catch as it is totally counterproductive. I am also removing C6 for the same reason.

7- why potentiometer wiper is connected to the signal source (backwards)
I flipped pins 1 and 3 for both R4 and R11. This will make its use more logical.

8- why snubber is connected parallel to the resistor of the filter. Resistor in snubber has 6 times more resistance so it will do nothing

I removed both C13 and R12.

9- another resistor that is in fact parallel to R14 and does nothing.

I removed this pull-up resistor.

To recap, the following have been removed (original component designators as shown in prior posts):

D3, D4, D5, D6, D7, D8, R9, R10, R12, R14, C6, C7, C8, C10, C11, C12, C13

Add to the list:
10-  where do this current expected to flow?  from V_sys to V_sys?

In short, no. Of course not. I am not sure I am understanding what you are asking in this one. Please advise if this concern applies to the current schematic I'm attaching here and, if so, please give me a bit more info as I may be missing something obvious on this one.

11 - why is base connected to  V_sys?

This is a massive error on my part. It looks like I somehow flipped the orientation of the transistor. I’m putting it back as it should be here.

12 - in previous version Q1 base current will flow all the time so transistor is turned on all the time. Is it on purpose?

No, not intentional. This should be fixed by recent revision.


13-  how do you want to adjust R1 and R4? Two potentiometers for one winding. How do yo know that there is need for adjust R1?

What was R1, I believe, was a 10K pot solely for the LED. The 2.5K pots were for each transistor.

How do yo know that there is need for adjust R4 but not R1?

In the schematic I am adding to this post, R5 and R6 are the pots tied to base of each of the transistors.

Updated BOM:

Item   Quantity   Designator   Manufacturer_Name   Manufacturer_Part_Number   Description   Footprint
1   2   C1, C2   EPCOS - TDK Electronics   B32526R0107K000   CAP FILM 100UF 10% 63VDC RADIAL   CAP_B32526R0107K000
2   1   C3   Panasonic   ECW-FD2J104J4   CAP FILM 0.1UF 5% 630VDC RADIAL   ECW-FD2J104J
3   1   C4   TDK Corporation   CGA5L4NP02J103G160AA   10000 pF ±20% 630V Ceramic Capacitor C0G, NP0 1206 (3216 Metric)   C1206
4   1   C5   Samsung Electro-Mechanics   CL32E106KBVVPOE   Multilayer Ceramic Capacitors MLCC - SMD/SMT 10uF X8L 50V 1210 Auto grade   C1210
5   1   C6   TDK   C3216X7R1H105K160AE   CAP CER 1UF 50V X7R 1206   C1206
6   2   D1, D2   Rohm Semiconductor   RB088T-30HZC9   Diode Array 1 Pair Common Cathode 30 V 5A Through Hole TO-220-3 Full Pack   TO-220-3
7   1   F1   Littelfuse Inc.   0618005.MXP   FUSE GLASS 5A 250VAC 5X20MM   0618005.MXP
8   1   F2   Littelfuse Inc.   06183.15MXP   FUSE GLASS 3.15A 250VAC 5X20MM   
9   4   HS1, HS2, HS3, HS4   Wakefield Thermal   OMNI-UNI-34-50   HEATSINK TO-247 TO-264 TO-220   OMNI-UNI-34-50
10   4   Not on schematic   Wakefield Thermal   OMNI-220C   UNIVERSAL TO-220 HEATSINK CLIP   
11   1   J1   Switchcraft Inc.   L721RAHLP   LOW PROFILE RAPC MOUNT DC POWER   L721RAHLP
12   2   J2, J3   Molex   47053-3000   Connector Header Through Hole 4 position 0.100" (2.54mm)   47053-3000
13   2   J4, J5   Phoenix Contact   1714971   2 Position Wire to Board Terminal Block Horizontal with Board 0.375" (9.53mm) Through Hole   PHOENIX_1714971
14   3   L1, L2, L3   Bel Signal   HTTI-47-5.6   47 µH Shielded Toroidal Inductor 5.6 A 36mOhm Max Vertical, No Base, 2 PC Pin   IND_HTTI-47-5.6
15   1   LED1   ams OSRAM   KB DELPS2.12-QHRI-24-Z555-10-S   Blue 466nm LED Indication - Discrete 2.95V 2-SMD, Flat Leads   LED_SMD
16   2   Not on schematic   Schurter   31.8275   Fuse Holder OGN-SMD Fuseholder 5x20   
17   1   Q1   onsemi   2SA2210-1E   TRANS PNP 50V 20A TO-220F-3SG   TO-220-3-PNP
18   1   Q2   onsemi   2SC6082-1E   TRANS NPN 50V 15A TO-220F-3SG   TO-220-3-NPN
19   1   R1   Bourns   PCW1D-B16-KAB103L   Potentiometers 10K 20% Sq 22mm Single Turn   Res_Pot
20   1   R2   Rohm Semiconductor   SDR03EZPJ222   RES SMD 2.2 KOHM 5% 0.3W 0603   R0603
21   2   R3, R4   KOA Speer Electronics, Inc.   RK73H3ATTE1651F   Thick Film Resistors - SMD 1.65K OHM 1%   R2512
22   2   R5, R6   Bourns   PCW1J-R24-KAB252L   POT 2.5K OHM 3/4W PLASTIC LINEAR   Res_Pot
23   2   R7, R8   IRC / TT Electronics   W22R120JRLF   Wirewound Resistors - Through Hole 0.12ohm 7watt 5%   W22R120JRLF_axial_22mmx0.8mm
24   3   SW1, SW2, SW3   NKK   MN11SS1W03   Single-Pole, Single-Throw Switch   SWITCH_MN11SS1W03
25   11   TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11   Keystone Electronics   5198TR   PC TEST POINT MINIATURE GRAY   KEYSTONE_5198TR
26   3   TVS1, TVS2, TVS3   Texas Instruments   TVS2701DRBR   27-V bidirectional flat-clamp surge protection device   VSON-8
27   1   U1   STMicroelectronics   STUSB4500QTR   USB Controller USB 2.0 I2C Interface 24-QFN (4x4)   USB_C_IC_VFQFN-24
28   1   USB_CONN   Amphenol ICC (Commercial Products)   124019282112A   USB TYPE C, RECEPTACLE, TOP MOUN   USB_C_124019282112A

Add to the list:
10-  where do this current expected to flow?  from V_sys to V_sys?
11 - why is base connected to  V_sys?
12 - in previous version Q1 base current will flow all the time so transistor is turned on all the time. Is it on purpose?
13-  how do you want to adjust R1 and R4? Two potentiometers for one winding. How do yo know that there is need for adjust R1?
How do yo know that there is need for adjust R4 but not R1?

[lobster]

Thanks for your feedback. When you refer to the power section, are you talking about the Power Supply section at the top left of the schematic or, more generally, V_SYS?

This is my first post here so please go easy on me.

I will go easy on you. Easy, respectfully but also firmly, I would suggest for you to assemble the proven original Slayer circuit first, and fully understand why and how it operates. If you can't build it, at the very least simulate it with LTSpice. Most and foremost, understand the feedback mechanism which makes it to oscillate.

Once you have understood its operation, then and only then attempt something more complicated. Right now, it seems that you are only throwing components haphazardly into a schematic, without much thought or knowledge. All of your posted circuits so far, have fatal flaws in the power section, which appears you fail to grasp. Those have been addressed earlier and will not repeat them here.

[Analog Kid]

Another minor point here:
You seem quite enamored of making complete BOM lists, very specific with mfgr's part #s. Why?
This is putting the cart waaaaay before the horse.
Generally you want to come up with a working circuit first, at least in simulation, better yet a working prototype.
After the inevitable tweaking, substitution andf ripping out and revising whole sections, that's the time to start putting together a BOM. Not at this point where it seems you don't even really understand how the damn thing's supposed to work.

[lobster]

Simply want to head off potential questions and make it easier for whoever is reviewing the schematic to see what I have in mind.

Another minor point here:
You seem quite enamored of making complete BOM lists, very specific with mfgr's part #s. Why?
This is putting the cart waaaaay before the horse.
Generally you want to come up with a working circuit first, at least in simulation, better yet a working prototype.
After the inevitable tweaking, substitution andf ripping out and revising whole sections, that's the time to start putting together a BOM. Not at this point where it seems you don't even really understand how the damn thing's supposed to work.

[Analog Kid]

Simply want to head off potential questions and make it easier for whoever is reviewing the schematic to see what I have in mind.

Having all those specific mfgr. part #s is not gonna help.
A reasonable schematic will.

[SteveThackery]

Why are D1 and D2 zeners?

R4 and R6 don't seem to do anything - they are bypassed by the other wire going to the transistor.