PCB design challenge #1

[temol]

I would like to invite you to participate in the PCB design challenge.
The challenge starts today, Friday, December 16, and ends on Friday, January 13, 2023.


Guidelines

1. Participants must design a single-sided PCB, possible to make at home using various DIY methods (toner transfer, UV film, etc.). No vias, no veroboards, stipboards, tagboards, double sided boards. Jumpers allowed.

2. The participant should submit his project in the form of a graphic or pdf file. 1:1 scale PCB image as well as component layout with component values or component numbers corresponding to the schematic. The participant decides which software he uses.

3. The project should be submitted in this thread, no earlier than January 12, no later than January 13 (two last days of the challenge).

4. Fair play rules apply, i.e. we do not use existing layouts.

The winners will be chosen by voting.


Prizes

The First Prize: $50 PedalPCB gift card.
The Second Prize: custom-made, powder coated aluminum enclosure. Design to be agreed with the winner.
The Third Prize: surprise from Sushi Box FX.

Schematic

Meet Quark, envelope filter. Dr Q modified by @Chuck D. Bones.




Get to work, the clock is ticking

 

[swyse]

CW marks pin 3 correct? I redrew the schematic in in easyEDA as that is my preferred software. https://oshwlab.com/swyse/quark this link should be the project if anyone else wants to work in easyEDA, the schematic looks blank, but when I click open in editor it works so hopefully its good to go.

 

[temol]

That's correct. CW = pin 3.

 

[swyse]

That's correct. CW = pin 3.

Thanks, I fixed the schematic on the EasyEDA project link to reflect this, I think it should be good to go now.

 

[steviejr92]

Just waiting on my computer to come in and I’m starting right away!

 

[temol]

I think putting the RLED on the board is optional. The designer decides himself. Everyone has their preferences when it comes to wiring LEDs.

 

[benny_profane]

Just waiting on my computer to come in and I’m starting right away!

What did you end up going with?

 

[andare]

Sorry this is being copied from my phone
…
edit: realized the link didn’t work
View attachment 38271

Only 800 dollars for those specs? I wish I didn't hate Windows more than anything. The Apple tax is unbelievably high nowadays. A MacBook with those specs would be well over 2 grand.

 

[steviejr92]

Only 800 dollars for those specs? I wish I didn't hate Windows more than anything. The Apple tax is unbelievably high nowadays. A MacBook with those specs would be well over 2 grand.

Yeah came out to even less because I applied for an Amazon prime card and was given an 80 dollar gift card with it!

EDIT: Last post about this I swear I don’t want to take away from the contest thread!

 

[fig]

This is a great challenge! Thanks @temol, @Chuck D. Bones , @vigilante398 , @PedalPCB .

I have a couple of ideas but their hope of survival are slim

Time to build something....to the breadboard!

 

[Harry Klippton]

This is a great contest idea. I hope there will be more next year and I can find the time to participate

 

[Chuck D. Bones]

I drew the schematic with TinyCAD. If anyone wants a copy, I can provided it. The netlist is 100% correct, but the BOM will need editing.

 

[KR Sound]

I drew the schematic with TinyCAD. If anyone wants a copy, I can provided it. The netlist is 100% correct, but the BOM will need editing.

I'd love to check it out!

 

[Fingolfen]

I drew the schematic with TinyCAD. If anyone wants a copy, I can provided it. The netlist is 100% correct, but the BOM will need editing.

Oooh me! Pick Me!

 

[Passinwind]

This is a great contest idea. I hope there will be more next year and I can find the time to participate

Same here. I may take a stab at it anyway though.

 

[Feral Feline]

I know it's LIY (Lay-out It Yourself), but I took the liberty of making a parts table for everybody; and as there aren't too many redundants, I didn't put together a shopping list 'cause y'all should be able to get that out of the table:

EDIT: SEE POST #18

RESISTORS		CAPS		ETC
R1	1M	C1	10n	D1	1N4148
R2	10k	C2	100p	D2	1N5817
R3	10k	C3	10n
R4	470k	C4	4n7	Q1	2N5457
R5	470k	C5	4n7	Q2	BC549C
R6	47k	C6	33p
R7	220 Ω	C7	220n	U1	TL072
R8* [TWO]	100k, 100k	C8	10n	U2	78L05
R9	47k	C9	47µ
R10	3M3	C10	10µ	VR1	C1M
R11	100 Ω	C11	100µ	VR2	B5k
R12	22k	C12	220n	VR3	B50k
R13	6k8	C13	47µ	TR1	B10k
R14 RLED	4k7

*Two x R8:
1st off Q2, 100k
2nd before OUT, 100k


Hmmm the column spacing didn't paste, nor the colour... anyway, there ya go!



PS: Echoing thanks to Temol, Chuck D Bones, Robert/PedalPCB & Vigilante398

SPECIAL THANKS FOR A FUN CIRCUIT TO BUILD

 

[temol]

Yeah.. R8 is doubled.
So we can make this one R14

 

[Feral Feline]

RESISTORS		CAPS		ETC
R1	1M	C1	10n	D1	1N4148
R2	10k	C2	100p	D2	1N5817
R3	10k	C3	10n
R4	470k	C4	4n7	Q1	2N5457
R5	470k	C5	4n7	Q2	BC549C
R6	47k	C6	33p
R7	220 Ω	C7	220n	U1	TL072
R8	220k*	C8	10n	U2	78L05
R9	47k	C9	47µ
R10	3M3	C10	10µ	VR1	C1M
R11	100 Ω	C11	100µ	VR2	B5k
R12	22k	C12	220n	VR3	B50k
R13	6k8	C13	47µ	TR1	B10k
R14	100k
RLED (CLR)	4k7

*EDIT: R8 bumped from 100k to 220k, as noted by CDB in Post #60

 

[cdwillis]

Cool! I got the schematic drawn up in Eagle and started placing parts on the PCB. I started learning Eagle using two sided layouts, so this is a little more challenging just having the top side to use, but I at least get to put a ground plane on top which helps.

 

[Passinwind]

Yeah.. R8 is doubled.
So we can make this one R14
View attachment 38300

"RLED" is an illegal descriptor in KiCAD, at least for the older versions. It could be RLED1 if necessary though. IN and OUT are illegal too, for that matter!