Author Topic: The "I made this!" thread - Beginners achievements with pride.  (Read 8190 times)

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Offline Hextejas

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #25 on: February 27, 2018, 04:39:42 pm »
BrianHG, does Digikey have the Parts package under a specific name ?
 

Offline jerryk

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #26 on: February 27, 2018, 08:46:59 pm »
I'm suffering from severe excitement.  My boards just came in from PCBWay.

Jerry
 

Offline paulcaTopic starter

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #27 on: March 03, 2018, 11:00:30 pm »
Not really a "I made it", but this is my first attempt at hot air soldering under a microscope.  I think it's easier with just a magnify visor.


"What could possibly go wrong?"
Current Open Projects:  STM32F411RE+ESP32+TFT for home IoT (NoT) projects.  Child's advent xmas countdown toy.  Digital audio routing board.
 
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Offline BrianHG

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #28 on: March 07, 2018, 01:34:08 am »
BrianHG, does Digikey have the Parts package under a specific name ?
I just received the PCBs and getting in enough parts to assemble 2 of them.  You might as well wait till I upload a before/after audio samples on the weekend here on the forum.

If you take a look at my BOM files, the .cvs, tab delimited, scroll to the right and there are 2 different colums, with a 'Digikey' web link.  But, this weekend, on my official project page, I'll add a 'Share-Shopping Cart' link/file from Digikey so you may order, add/remove parts as you like.
https://www.eevblog.com/forum/projects/free-subwoofer-audio-processor-project-for-forum-members/msg1434525/#msg1434525
« Last Edit: March 07, 2018, 01:36:13 am by BrianHG »
 

Offline paulcaTopic starter

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #29 on: March 10, 2018, 04:19:14 pm »
My first ever PCB!  Second I have sent for manu, but it arrived first.  The other one got stuck with customs. :(  Have to wait on the bill to get it delivered.

It runs a strip of WS2811 LEDs to make a colourful lamp for my 7 month daughter.



KiCad 3D version:


PCB Layout (there were a few revisions after this like putting the power the right way around!):


Schematic:


Few teething troubles:
* ISP header has the power pins backwards (seems to be a theme)
* ATTiny in SMD format seems to have slower fall times on the data switching, so I needed a 1k botch resistor pull down to force it to fall faster.

But it works.
This is the prototype running:

"What could possibly go wrong?"
Current Open Projects:  STM32F411RE+ESP32+TFT for home IoT (NoT) projects.  Child's advent xmas countdown toy.  Digital audio routing board.
 
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Offline inventhouse

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #30 on: March 10, 2018, 05:10:07 pm »
Just installed one of the nifty DPS5005 power supply modules(*) driven with a 24V*1.8A into my "Hack-In-A-Box" toolbox, which also includes a RasPi 3, 7" LCD, 5V*7A power supply, extra charging ports, and a load of parts and tools :-DMM

(*) https://www.eevblog.com/2017/10/11/eevblog-1030-20-diy-bench-power-supply/
 
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Offline paulcaTopic starter

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #31 on: March 10, 2018, 06:08:40 pm »
Nice!  I found the DPH5005 does a great job running on a LiPo battery.  In your case a 24V 6 Series LiPo would work.  They are quite small.
"What could possibly go wrong?"
Current Open Projects:  STM32F411RE+ESP32+TFT for home IoT (NoT) projects.  Child's advent xmas countdown toy.  Digital audio routing board.
 

Offline BrianHG

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #32 on: March 13, 2018, 10:55:39 pm »
Finally, built 2 Subwoff PCBs.  Audio samples coming in 2 days.  I'll be looking through Youtube movie previews & use one as an audio reference & provide 3 samples of original, Subwoff enhanced mixed audio and subsonic only at full blast.


 
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Offline BrianHG

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #33 on: March 14, 2018, 12:30:12 am »
Holy S--t, this sounds insane with modern recordings which have VLF all over them.  I'm adjusting 1 gain resistor value, otherwise, it all rumble and nothing else...

Cad and now BOM updated here: https://www.eevblog.com/forum/projects/free-subwoofer-audio-processor-project-for-forum-members/

Preparing audio samples this Thursday...  For some of you with good 20Hz sound cards/cd players/amps & OK speakers which go below 40hz, get ready to rumble.
« Last Edit: March 14, 2018, 02:12:47 am by BrianHG »
 

Offline paulcaTopic starter

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #34 on: March 14, 2018, 08:19:07 am »
Not sure if it helps or gives you ideas, but the sub woofer I have for my car (with built in amp) exposes it's amp parameters.

Freq - the peak point of the gain frequency.
Q - The width of the frequency which is gained.
Gain - How much gain is applied.
Level - The amp output level.

It's important when you put the woofer into an enclosed space that you try and avoid gaining too much frequencies that cause standing waves or resonance in the car body which just rattles stuff.  I found with everything in the middle mine sounded fine until I put the back seat up, then it sounded boxy and boomy.  So I dropped the frequency and tightened it little to avoid boosting the higher bass frequencies, this fixed most of that problems... just my fillings that rattled then.

Also, enjoy this:

"What could possibly go wrong?"
Current Open Projects:  STM32F411RE+ESP32+TFT for home IoT (NoT) projects.  Child's advent xmas countdown toy.  Digital audio routing board.
 

Offline BrianHG

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #35 on: March 14, 2018, 07:40:02 pm »
Not sure if it helps or gives you ideas, but the sub woofer I have for my car (with built in amp) exposes it's amp parameters.

Freq - the peak point of the gain frequency.
Q - The width of the frequency which is gained.
Gain - How much gain is applied.
Level - The amp output level.

It's important when you put the woofer into an enclosed space that you try and avoid gaining too much frequencies that cause standing waves or resonance in the car body which just rattles stuff.  I found with everything in the middle mine sounded fine until I put the back seat up, then it sounded boxy and boomy.  So I dropped the frequency and tightened it little to avoid boosting the higher bass frequencies, this fixed most of that problems... just my fillings that rattled then.

Also, enjoy this:

In the 25hz setting on my Subwoff booster, that's nuts.  I don't think my neighbors like me anymore.  But, in the 20hz and 15hz settings, that music doesn't do much except for the odd fewest lowest notes in the 20hz setting.  In fact you know it's bass since you can hear it...

That music is mostly bass, not subsonic.  Even the cheapest film/movie, or good TV show has tremendous effects in the 20hz setting.  Only the very special scenes are in such Hollywood action blockbuster makes it through the 15hz setting.

Remember, a lot of subwoofers start below 100hz, or 50hz, or 40hz.  I'm talking about the inaudible stuff below 25hz.
« Last Edit: March 14, 2018, 07:42:20 pm by BrianHG »
 

Offline lordvader88

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #36 on: March 15, 2018, 05:03:39 am »
Cut up and re-used a TV remote control PCB to make a little series pass regulator with LM358 and LM336 Vref , for 3V to power a cheap but functional Vici VC99 DMM. Its using off a 12V transformer. PCB fits neatly in the battery case. 1/2 deadbug, 1/2 through-hole
« Last Edit: March 15, 2018, 05:06:59 am by lordvader88 »
 

Offline jerryk

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #37 on: March 15, 2018, 05:08:05 pm »
My security upgrade is now in its final resting place next to the old system I had installed over thirty years ago.  The enclosure was an obstacle by itself but worked out in the end.

I did make a few mistakes in the final board run.  The main power plane connecting all of the 220 resistors to the optocouplers had a tiny gap that mean I got to solder bridge all the resistors to that plane.  I created a couple of unconnected islands that had to have belated vias installed.  I omitted a control wire from the pi to the adc, hence the jumper wire around the pi pins.  With a few more ugly solder bridges here and there it actually works as planned.  The biggest goof was mounting the pi mirror image to my intentions.  It was supposed to go directly under the board and not staggered.  I spend so many hours checking so many things and missed that one!  Regardless of the stumbles, it's functionality is beyond my expectations.  The best part is remote control of the keypad.  Unravelling the serial code used to control it took a while but the ease of making changes to the panel via a computer instead of the dreaded keypad is worth the effort.

Thanks to all of you that helped me in this project.

Jerry
 
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Offline BrianHG

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« Last Edit: March 16, 2018, 08:02:32 am by BrianHG »
 

Offline yashrk

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #39 on: March 16, 2018, 05:46:59 am »
I'm suffering from severe excitement.  My boards just came in from PCBWay.

Jerry

Nice rounded corners  :-+ :-+
Find me and things I'm working on - https://www.yashkudale.com/
 

Offline BrianHG

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #40 on: March 16, 2018, 06:18:34 am »
My security upgrade is now in its final resting place next to the old system I had installed over thirty years ago.  The enclosure was an obstacle by itself but worked out in the end.

I did make a few mistakes in the final board run.  The main power plane connecting all of the 220 resistors to the optocouplers had a tiny gap that mean I got to solder bridge all the resistors to that plane.  I created a couple of unconnected islands that had to have belated vias installed.  I omitted a control wire from the pi to the adc, hence the jumper wire around the pi pins.  With a few more ugly solder bridges here and there it actually works as planned.  The biggest goof was mounting the pi mirror image to my intentions.  It was supposed to go directly under the board and not staggered.  I spend so many hours checking so many things and missed that one!  Regardless of the stumbles, it's functionality is beyond my expectations.  The best part is remote control of the keypad.  Unravelling the serial code used to control it took a while but the ease of making changes to the panel via a computer instead of the dreaded keypad is worth the effort.

Thanks to all of you that helped me in this project.

Jerry
I still love that 'Harmful if swallowed...' comment on your silkscreen.  :-DD
 

Offline IsabellaMiller1950

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #41 on: March 16, 2018, 10:29:46 am »
Finally, built 2 Subwoff PCBs.  Audio samples coming in 2 days.  I'll be looking through Youtube movie previews & use one as an audio reference & provide 3 samples of original, Subwoff enhanced mixed audio and subsonic only at full blast.



Congrats! Does it meet your expectations while using? :)
 

Offline BrianHG

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #42 on: March 16, 2018, 09:42:17 pm »
Congrats! Does it meet your expectations while using? :)
It's great for older material before 2005, gives it a modern feeling.  For newer stuff, it's insane!  My neighbors don't like me anymore.

.mp3 sample demo here: https://www.eevblog.com/forum/projects/free-subwoofer-audio-processor-project-for-forum-members/msg1453438/#msg1453438
 
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Offline paulcaTopic starter

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #43 on: March 17, 2018, 11:37:59 am »
It lives!

Binary clock.  First PCB I ever designed.  Though it arrived after my second PCB.

ATMega328P, DS1302 RTC w/ 3.6V NiMH battery, TLC59282 LED Driver, Adafruit 128x64 oLED.

The most surprising thing is... I have found zero errors so far.  It worked out of the bag.  Quite surprised.

In the photo it's running off an 18650 laptop cell, I have TP4056 board to allow charging.  Just wondering about a case now.

"What could possibly go wrong?"
Current Open Projects:  STM32F411RE+ESP32+TFT for home IoT (NoT) projects.  Child's advent xmas countdown toy.  Digital audio routing board.
 

Offline paulcaTopic starter

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #44 on: March 29, 2018, 06:51:23 pm »
So I made a sound card.  A USB one.  Based on the TI PCM2904 USB DAC.  Works a treat, both output and input.  No drivers needed, appears as "USB Audio Codec" in windows and Linux.  Will drive a pair of headphones at nanny state level, but put it into a decent headphone amp and you will find it is not short of gain.



All SMD with the exception of the white power LED.  Air soldered with an 898 clone.  All components ordered from RS Components.  It wasn't exactly cheap though.  BOM and boards for 2 + left overs was about £100.

Designed in KiCad with lots of help around getting the output filter designed from the kind folks on here.  Ended up using a butterworth filter from a TI Application/Design note/Demo board.

Full sources for KiCad is available here:
https://gitlab.com/paulcam/PCM2904_DAC

Board manufactured by AllPCB for $22 including shipping which only took 6 days end to end.  I ordered 5, they sent 10.  The boards would have been $15 but I wanted blue solder mask which added $7.

(On the topic of gain, if you want to drive headphones (at all) or an headphone with a bit of kick, swap R8 and R9 for 3.9K instead of 12K.)

It's mind boggling to think I went from asking dumb questions about Ohm's law in October to making a full USB sound card device this week!

Oh and.. jerryk, you have started a trend with your "Harmful if swallowed."


"For external use only!"
« Last Edit: March 29, 2018, 06:54:38 pm by paulca »
"What could possibly go wrong?"
Current Open Projects:  STM32F411RE+ESP32+TFT for home IoT (NoT) projects.  Child's advent xmas countdown toy.  Digital audio routing board.
 

Offline davethecipo

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Re: The "I made this!" thread - Beginners achievements with pride.
« Reply #45 on: July 07, 2018, 05:29:16 pm »
Hi everyone!

I followed the "Getting to Blinky" tutorial from Chris Gammell to familiarize myself with Kicad. This is my first PCB. I used through holes components and the bipolar version of the 555, which I already had, instead of the CMOS version. 9V battery for the power. First of all, I want to thank Chris for the tutorial.

Now, coming to the beginner mistakes I made, this is what I found:

1. I flipped the + and - signs on the silkscreen...doh!
2. Pin 5 (Control Voltage) shouldn't be connected to Ground, therefore I had to lift the leg of the 555. The manual suggests a 0.01 uF cap.
3. I got the wrong footprint for the 555...next time I'll double check
4. I got the wrong polarity for the LED...double doh!!

The main lesson for me was to RTFM and double check the footprints. Anyways at the end of the day I'm very happy!
 


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