Author Topic: 5 Transistor ESR Meter Design  (Read 125491 times)

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Offline m3vuv

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Re: 5 Transistor ESR Meter Design
« Reply #100 on: March 01, 2016, 06:37:38 pm »
thought the copper pour was better tbh,uses less etchant,is the image mirrored and ready to print and iron on?,cheers.
 

Offline mauroh

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Re: 5 Transistor ESR Meter Design
« Reply #101 on: March 01, 2016, 09:25:00 pm »
Attached you can find my Eagle design of the through hole version.
I just made few changes to the Jay_Diddy_B Design of R.Hirst Design (I left all the names on the silkscreen :)).

The idea was to have a super easy layout that can be toner transferred and also built on a veroboard, since all the holes are on a 100mil grid as the traces.

I have't build it as I ended up building the M12864 DIY Kit instead (http://www.banggood.com/it/DIY-M12864-Graphics-Version-Transistor-Tester-Kit-LCR-ESR-PWM-p-986954.html), but please let me know if you will build it (post pictures...) and if you have any suggestions.
The attached PDF is mirrored to be toner transferred.
Do not scale it and verify the print dimension against the measurement (70*43mm)

Can someone explain me why you prefer to build this analog version instead of the microcontroller one?
That kit came with a nice PCB, the micro already programmed (if this is your issue), a case is available, it can measure capacitance, ESR with 0.01ohm resolution, it can test also BJTs, MOS… and you can find a great support in this tread:
http://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/

Mauro

Edit: To answer my question, reading Jay_Diddy_B early posts: "In my design, I wanted to see if I could do something useful with a few transistors"
         Well you actually did it great  :-+ and thank you for sharing it.
« Last Edit: March 15, 2018, 01:18:33 am by mauroh »
 

Online Jay_Diddy_B

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Re: 5 Transistor ESR Meter Design
« Reply #102 on: March 01, 2016, 09:51:10 pm »
Hi,

The 5 transistor ESR meter use parts that most people will have in their junk box. The circuit can be built with just about any transistors. The only parts that are critical are the two rectifiers in meter circuit. I used 1N5711.

The $20.00 device is capable of a lot more measurements than the ESR meter.

The ESR meter can measure the capacitors in circuit, this means you don't have to remove them for measurement. There are, of course, some exceptions. If you have two or more capacitors connected in parallel you can not measure the ESR of the individual capacitors.

I also designed the ESR meter Adapter.





This can be found in this thread:

http://www.eevblog.com/forum/projects/esr-meter-adapter-design-and-construction/

In many ways this better than the 5 transistor meter, it is really robust, You can apply a charged capacitor or even line voltage, without damaging the adapter. This is really important if you are working on SMPS, because sooner or later you find a charged capacitor. It does use a few parts that you might not have in your junk box.

Regards,

Jay_Diddy_B

@m3vuv

thought the copper pour was better tbh,uses less etchant,is the image mirrored and ready to print and iron on?,cheers.

The image is mirrored and ready to iron on. I have marked dimensions for you to check.



 

Offline mauroh

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Re: 5 Transistor ESR Meter Design
« Reply #103 on: March 01, 2016, 10:40:09 pm »
Wow really nice, thank you!!  :-+

Mauro

Offline m3vuv

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Re: 5 Transistor ESR Meter Design
« Reply #104 on: March 02, 2016, 10:52:48 am »
NICE ONE,what a star !,cheers.
 

Offline ledtester

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Re: 5 Transistor ESR Meter Design
« Reply #105 on: March 03, 2016, 05:38:28 am »
Hi,

The 5 transistor ESR meter use parts that most people will have in their junk box. The circuit can be built with just about any transistors. The only parts that are critical are the two rectifiers in meter circuit. I used 1N5711.

Can you recommend through-hole alternatives for the 1N5711 diodes?
 

Online fpliuzzi

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Re: 5 Transistor ESR Meter Design
« Reply #106 on: March 03, 2016, 06:27:25 am »
Quote
Can you recommend through-hole alternatives for the 1N5711 diodes?

The through hole version of the 1N5711 Schottky diode is still readily available...

www.mouser.com/ProductDetail/STMicroelectronics/1N5711/?qs=FITO%2F%2FQgYDnH7pJ7rS2FRA%3D%3D
 

Offline DarkZero

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Re: 5 Transistor ESR Meter Design
« Reply #107 on: March 16, 2016, 08:26:39 pm »
can i use BAT41 instead of 1N5711 ?

http://www.vishay.com/docs/85659/bat41.pdf
 

Offline entwiz

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Re: 5 Transistor ESR Meter Design
« Reply #108 on: May 06, 2016, 01:13:02 am »
Hi, thought I would post my build of the discrete version of the circuit. It could still use a bit of work on the graphic arts, but I built it about a year and a half ago and it's working fine as is (on the same batteries!)  I don't use it quite as much as I thought I would since I picked up an LRC meter at a university surplus auction cheap.

Main variations on the original are use of 2N4401/2N4403 transistors and SD101A schottky diodes.  I also dropped the voltage to 4V.  The voltage regulator is  a Microchip 1702 4V LDO.  The circuit is built up on a 11 by 24 hole standard protoboard. The protection diodes and the meter tuning resistor are soldered freeform to the terminal posts. The meter is a ancient Micronta (Radio Shack) one I've had sitting around for years. I added a power on LED as well.

The case is 1/4" poplar finished with a stain and oil finish. The panel is 1/8" hard-board (Masonite) coated with black gloss enamel spray paint. The meter face was just marked off using various resistors to calibrate it.
 

Online Jay_Diddy_B

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Re: 5 Transistor ESR Meter Design
« Reply #109 on: May 06, 2016, 02:36:06 am »
entwiz,

It looks great!!

Thank you for sharing.

Regards,

Jay_Diddy_B
 

Online Jay_Diddy_B

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Re: 5 Transistor ESR Meter Design
« Reply #110 on: May 06, 2016, 08:08:23 am »
Hi group,

If anybody has difficulty getting the ESR meter to work, there is some useful information in this thread:

http://www.eevblog.com/forum/projects/jay-diddy-5-transistor-esr-meter/msg933224/#msg933224

I have posted the waveforms that can be expected.

Here is a schematic showing the DC voltages:



Regards,

Jay_Diddy_B
 
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Offline anda

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Re: 5 Transistor ESR Meter Design
« Reply #111 on: October 29, 2016, 02:49:02 am »
Any one have the pcb ready for print for this esr?
 

Online Jay_Diddy_B

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Re: 5 Transistor ESR Meter Design
« Reply #112 on: October 31, 2016, 12:58:14 pm »
Any one have the pcb ready for print for this esr?

I might be able to help you. What are you looking for?

Are you looking for a picture of the artwork so that you can do toner transfer?

Are you looking for the Gerber files so that you can have the board made?

Are you looking to build a SMD version like my original unit or a thru hole version?

Let me know and I will see if I can help.

Regards,


Jay_Diddy_B

 

Offline w2aew

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Re: 5 Transistor ESR Meter Design
« Reply #113 on: November 09, 2016, 03:47:23 pm »
Since I think this 5 transistor ESR meter design is very clever, I decided to take a closer look at it in my latest "Circuit Fun" video:

======================================
YouTube channel: http://www.youtube.com/w2aew
FAE for Tektronix
 

Offline Fisher77

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Re: 5 Transistor ESR Meter Design
« Reply #114 on: November 10, 2016, 06:28:59 am »
Any one have the pcb ready for print for this esr?

I might be able to help you. What are you looking for?

Are you looking for a picture of the artwork so that you can do toner transfer?

Are you looking for the Gerber files so that you can have the board made?

Are you looking to build a SMD version like my original unit or a thru hole version?

Let me know and I will see if I can help.

Regards,


Jay_Diddy_B

After reading through this thread, I am confused as to what schematic goes with what. I am interested in the through hole version. Can you post the schematic, the component layout, and image for the through hole toner transfer together?

Thanks
« Last Edit: November 10, 2016, 06:30:55 am by Fisher77 »
 

Online Jay_Diddy_B

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Re: 5 Transistor ESR Meter Design
« Reply #115 on: November 10, 2016, 12:33:45 pm »

After reading through this thread, I am confused as to what schematic goes with what. I am interested in the through hole version. Can you post the schematic, the component layout, and image for the through hole toner transfer together?

Thanks

Hi,

Here is a set of matching documents.

Note R24 is typically 12k Ohms but may need some adjustment. The 10K pot is place in series with the 50uA meter.


For this board:



The board size is 3.00 x 1.75 inches.

Regards,

Jay_Diddy_B
« Last Edit: November 13, 2016, 11:03:09 am by Jay_Diddy_B »
 
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Offline Fisher77

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Re: 5 Transistor ESR Meter Design
« Reply #116 on: November 12, 2016, 04:43:43 am »
Thanks for posting all the files together Jay_Diddy_B.

What would be the best analog meter to purchase for this?

I have a couple lying around, both are microamperes meteres, and are 50uA. I have no idea what the resistance of them is. I tried looking one up, it is a Modutec 930031-214(number on the front), but I found noting on it. The other just says made in Japan on it. I am fairly new to the electronics game, and have not messed with analog meters till now. I appreciate the help.
« Last Edit: November 12, 2016, 04:46:43 am by Fisher77 »
 

Offline SeanB

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Re: 5 Transistor ESR Meter Design
« Reply #117 on: November 12, 2016, 05:05:09 am »
Whichever one looks best to you, and where you can carefully dismantle it to change the scale ( or have a conversion table next to it if not) on it. the circuit will work with pretty much any 50uA meter, as the trimmer pot R24 ( a 10k pot for scaling) will handle pretty much any meter of 50uA, and is simple to calibrate by shorting the leads and setting for full scale on the meter.
 
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Online joseph nicholas

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Re: 5 Transistor ESR Meter Design
« Reply #118 on: November 12, 2016, 05:43:51 am »
I have searched for a voltmeter for this circuit and it would be better to get a jelly bean analog multimeter to house the circuit board and provide a simple set of test lead connections for the whole unit.   

I found a few on ebay for less than 5 usd. 

The only consideration is if the meter movement could be dissassembled to put the graphics inside.

jnicolas
 
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Offline Fisher77

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Re: 5 Transistor ESR Meter Design
« Reply #119 on: November 12, 2016, 07:02:08 am »
Whichever one looks best to you, and where you can carefully dismantle it to change the scale ( or have a conversion table next to it if not) on it. the circuit will work with pretty much any 50uA meter, as the trimmer pot R24 ( a 10k pot for scaling) will handle pretty much any meter of 50uA, and is simple to calibrate by shorting the leads and setting for full scale on the meter.

Thanks SeanB.
« Last Edit: November 12, 2016, 08:58:09 am by Fisher77 »
 

Offline Radio Tech

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Re: 5 Transistor ESR Meter Design
« Reply #120 on: November 12, 2016, 07:14:21 am »
Thanks for posting the through hole hole files. Have two boards eching now.
Got my interest up after watching Alans video.

Offline alin_im

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Re: 5 Transistor ESR Meter Design
« Reply #121 on: November 12, 2016, 09:01:16 am »
Thank you very much for the design !!!  I have some noob questions if its ok. Can I use 1n4148 diodes instead of es1j and also can I use a 1mA full deflection meter instead of a 50uA if I add a shunt resistor ?

One man's 'magic' is another man's engineering. 'Supernatural' is a null word. - Robert A. Heinlein
 

Online Jay_Diddy_B

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Re: 5 Transistor ESR Meter Design
« Reply #122 on: November 12, 2016, 09:32:39 am »
Thank you very much for the design !!!  I have some noob questions if its ok. Can I use 1n4148 diodes instead of es1j and also can I use a 1mA full deflection meter instead of a 50uA if I add a shunt resistor ?

The ES1J diodes are to provide some level of protection against charged capacitors. The 1n4148 will not provide enough protection.

The circuit is designed to use a 50uA meter movement, it will be difficult to get the circuit to work with a 1mA meter.

Regards,

Jay_Diddy_B
 

Offline alin_im

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Re: 5 Transistor ESR Meter Design
« Reply #123 on: November 12, 2016, 10:14:59 am »
Thank you for the advice, I will try with other diodes 1n4007 for example, also do you know where I can get a 50uA  :bullshit: ? On ebay they dont specify this spec, or do you know what I can change in the design to adapt with my 1mA meter?

Thank you very much for the design !!!  I have some noob questions if its ok. Can I use 1n4148 diodes instead of es1j and also can I use a 1mA full deflection meter instead of a 50uA if I add a shunt resistor ?

The ES1J diodes are to provide some level of protection against charged capacitors. The 1n4148 will not provide enough protection.

The circuit is designed to use a 50uA meter movement, it will be difficult to get the circuit to work with a 1mA meter.

Regards,

Jay_Diddy_B
One man's 'magic' is another man's engineering. 'Supernatural' is a null word. - Robert A. Heinlein
 

Offline wilfred

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Re: 5 Transistor ESR Meter Design
« Reply #124 on: November 12, 2016, 11:29:42 am »
Thank you for the advice, I will try with other diodes 1n4007 for example, also do you know where I can get a 50uA? On ebay they dont specify this spec.
Yes they do. If you search on 0-50uA you should have a suitable selection.
Like this one for example.
http://www.ebay.com.au/itm/85C1-Panel-DC-Ampere-Meter-Analog-Ammeter-0-50uA-/301756364092?hash=item464214b53c:g:aLsAAOSwzaJYAblR
or this one
http://www.ebay.com.au/itm/0-50uA-Class-1-5-Fine-Tuning-Dial-Panel-DC-Ampere-Meter-Amperemeter-/391187856822?hash=item5b149cfdb6:g:wAYAAOSwxKtYAprK

 
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