💬 EFEKTA Two channel Pulse Counter | nRF52

[openhardware.io]

https://www.openhardware.io/view/658/EFEKTA-Two-channel-Pulse-Counter-or-nRF52

[magpern]

@berkseo I am interested in this one. I uploaded the gerber files to a fab-house I usually use. The normally charge 5 usd for 5-10 pcbs, but for this one (and your e-paper device), they want over 50 usd. They say it uses minimum hole size is 0.2, which makes it expensive to produce.
Is this correct? If so, what pcb manufacturer do you recommend?

[magpern]

I checked your drill files. You do have 0.2mm drills for vias, and it looks they could be changed to 0.3mm without impacting anything. I suggest you change that, it would make it easier to produce.

[magpern]

Me again, I just realized it is a "work in progress", but anyway, I ordered some pcbs, could you, despite it beeing a work in progress, upload the BOM and a "what goes where" description?

[berkseo]

@magpern said in EFEKTA Two channel Pulse Counter | nRF52:

I am interested in this one. I uploaded the gerber files to a fab-house I usually use. The normally charge 5 usd for 5-10 pcbs, but for this one (and your e-paper device), they want over 50 usd. They say it uses minimum hole size is 0.2, which makes it expensive to produce.
Is this correct? If so, what pcb manufacturer do you recommend?

https://jlcpcb.com/

More loyal policy in this project it is possible to increase the holes, in the project temperature sensor with the display is not. I just have the program default to 0.2 mm vnutrennee hole and I have no problems with the price of this service https://jlcpcb.com/

[berkseo]

@magpern

I’ll download everything, but I don’t know when. In the queue updating the documentation for other popular projects

[magpern]

@berkseo said in EFEKTA Two channel Pulse Counter | nRF52:

@magpern

I’ll download everything, but I don’t know when. In the queue updating the documentation for other popular projects

OK, thanks. Hope it is soon! In the mean time, I was hoping to order most of the components. Could you help me identify these?

[berkseo]

@magpern
Hi,
1 - trimmer resistor 10K like these - https://ru.aliexpress.com/item/20-RM063-RM-063-100-200-500-1-2-5-10-20-50-100-200/32949941406.html
3 - ceramic capacitor 10uF 25V - https://ru.aliexpress.com/item/10uF-106-10-25V-1206-SMD-Chip-Multilayer-Ceramic-Capacitor-20pcs/32340271954.html
4 - ceramic capacitor ~100uF 6v/10v
2 - inductance 4.7UH - https://ru.aliexpress.com/item/100-SMD-1210-4-7uH-5-NLV32T-4R7J-PF/32853632579.html
5 - tlv3691 - https://www.elitan.ru/price/item10739559

[magpern]

@berkseo I'm trying to reverse engineer the BOM of this board, but I am quite unsuccessful. Could you please upload a BOM with (R1 = xxx k) or something similar, or Upload high-res closeups of the board so one can read the resistor values? Capacitors are a little harder, maybe you could share those values?
I have started on a BOM list, if you could help me fill it out, that would be much appreciated. I want to start soldering!!

Front

• YJ-16048 ----------- NRF52
• RGB LED ------------ RGB led with common cathod
• R11 ------------------------------------------------------------------- ???
• R12 ------------------------------------------------------------------- ???
• L1 --------- 4.7uH inductor
• C1 -------------------------------------------------------------------- ???
• TPS62XX ----------- TPS62745
• C3 -------10uF 25V 1206
• POWER ----- Vertical 7-pin switch
• U1, U3 ------- Battery holder 1/2 AA
• U5, U7 ------ 2 pin Screw connector
• Unmarked ------ Trimmer resistor 10K
• MODE, RESET --------- push button 3-pin vertical
• SWD -------- 6-pin female header 1.27 mm

Back

• R15 --------------------------------------------------------- ???
• R14 --------------------------------------------------------- ???
• R13 --------------------------------------------------------- ???
• R17 --------------------------------------------------------- ???
• R16 --------------------------------------------------------- ???
• R18 --------------------------------------------------------- ???
• R19 --------------------------------------------------------- ???
• C13 ----- 100uF 6v/10V
• C14 -------------------------------------------------------- ???
• R1 ---------------------------------------------------------- ???
• R2 ---------------------------------------------------------- ???
• U6, U8 ----- tlv3691
• R7, R10 -------------------------------------------------- ???
• R9 ---------------------------------------------------------- ???
• R8 ---------------------------------------------------------- ???
• R6 ---------------------------------------------------------- ???
• R4 ---------------------------------------------------------- ???
• R3 ---------------------------------------------------------- ???
• R5 ---------------------------------------------------------- ???
• R1 ---------------------------------------------------------- ???
• R2 ---------------------------------------------------------- ???