Shared Projects

SAML10 Cap Controller Board v0r0

Adapter board to connect USB-to-serial cable to J1 header on Open Hardware Summit badge

Blog post:

Adapter board for Open Hardware Summit badge

The badge features an ESP32 microcontroller running MicroPython firmware. The firmware provides a Python interpreter prompt (REPL) on the serial port which allows interactive programming of the badge!

GitHub repo:

adapter-board [commit: c355b30]

Bill of Materials (BoM)

• Digi-Key shopping cart

• Switch for programming mode

  • E-Switch EG1218
  • Slide Switch SPDT
  • Digi-Key: EG1903-ND

• Pushbutton for reset

  • Omron B3F-1000
  • Tactile Switch SPST-NO
  • Digi-Key: SW400-ND

• Header for FTDI usb-to-serial cable

  • TE AMP 9-146282-0-06
  • 1x6 Pin Header 0.1" pitch
  • Digi-Key: A34253-06-ND

• Header to connect J1 socket on badge

  • Harwin M20-9720345
  • 2x3 Pin Header 0.1" pitch
  • Digi-Key: 952-1921-ND

• J1 header socket on the badge

  • Harwin 952-1781-ND
  • 2x3 Header Socket 0.1" pitch
  • Digi-Key: M20-7830346

Mouse Project

If you order a set of these, please consider buying me a coffee Fix the audio on Gaboze Pocaio. Gaboze Pocaio uses unfiltered PWM into the amplifier stage and as a result most audio sounds pretty bad. the simplest fix for this is to add the filter circuit before the amplifier stage.

This board is an implementation of othermod’s clean PWM audio filter which adds an LDO, Buffer and Inductor to the mix to clean up the audio. The filter seems to remove a considerable amount of the CPU noise heard in the stream and cleans up the crashy, crackly and generally bad sounding raw PWM quite nicely

BOM: most components are listed as 0402 but I have successfully put one together with 0603 components as the pads are big enough.

U1 - SGM2019-2.5YN5G/TR - 2.5v LDO - SOT-23-5 -SGMICRO C1,C2 - 1u - 0402
C3 - 10nF - 0402
U2 - NC7SZ126M5X - Logic Buffer - SOT-23-5 - FAIRCHILD R1 - 1K - 0402
R2 - 4K7 - 0402 L1 - 33uH - 0603
R3 - 270R - 0402
R4 - 150R - 0402
C4 - 33nF - 0402
C5 - 10uF - 0603
C6* - 220nF - 0805
C6 is actually C2 fom the Gaboze PCB displaced onto this board and then this board wired in it’s place

VM Mother Board

njsharkracer.12vdc desulfator

https://github.com/njsharkracer/12voltdesulfator

http://www.youtube.com/playlist?list=PL82DFDAD35E4BFC59

Temperature compensated voltage controlled oscillator EMRFD Ch 12.8 Design: W7ZOI Layout: WA7MLH

General purpose Colpitts Xtal BFO (or xtal osc) www.neoanderthal.com/wa7mlh.htm

Broadband variable gain amplifier derived from Hybrid/Cacsode AGF/IF amp Design: W7ZOI Layout:WA7MLH

Colpitts VFO for 7slash7 TX & RX boards. www.w7zoi.net Design: W7ZOI Layout: WA7MLH

Previous Revision Link : https://oshpark.com/shared_projects/A34xfEaj

Update :
Fixed the missing ground planes…. Fixed silkscreen… Stupid mistake that puts my family to shame…

Breaks out OBDII connector to screw terminals for convenience.

Do you often need to program and then test your ATmega328P? If so, here’s a really simple little board that uses a ZIF socket to quickly swap in/out a 28pin ATmega328p. This was designed to work with the sparkfun USB pocket AVR programmer (sparkfun.com part number PGM-09825). Simply plug the 6-pin ribbon connector from the programmer into the shrouded connector on the board and you’re good to go. If you need to rapidly swap between programming your ATmega328 and putting it into action, take a look at my ATmega328p extension board. It allows you to use a ZIF socket on your breadboard to prevent bent pins when moving your IC around.

Test Board for A3909 Motor Driver

atmega32u4 board that breaks out 14 pins (PD0-7, PF0-1, PF4-7) powered by usb, with ISP header

Voice Recognition Headphones, senior design project UNLV

LocoNet, Arduino Uno R3 Shield, with I2C and Adafruit RA8875 800X480 Display Interface