Shared Projects

Active speaker processing board

Valve amplifier warm-up delay with display unit

Almost an exact duplicate of the original, all I did was change the ground to a ground plane on the bottom of the board, to hopefully help with some signal shielding. Please see the original at https://github.com/johnboiles/BaofengUV5R-TRRS. Thank you John.

BOM:
1x 3.5mm Stereo Cable
1x 2.5mm Stereo Cable
1x 3.5mm TRRS Cable
1x 10k Resistor 0603
2x 2.2k Resistor 0603
2x .01uF Capacitor 0603

Fermentation Temp Controller

A simple board to set up your LM317, use a calculator to find resistor values. C1 is .01μf, c2 can be anything but 47μf is good.

QFN

Motorcycle control & telemetrics

This is rev B of the original project located here: https://github.com/stamina/easyrider

Now with mostly SMD parts, GPS and WIFI.

DP6037 Case

USB Charger V2 using OnSemi lm2576 switching regulator. It will provide 5v 3amp output for charging I devices. There are resistor dividers for making the correct voltages on the d+ and d- . This layout is untested, but the schematic is fully tested and works well. There is one error on this board, it with the coil, it is layer out for an axial coil not the radial rl2444 that is on the silk. See v1 if you want to use the rl2444. I will update the description here with the correct coil when I get a chance. The correct coil should be coilcraft PCH-45X-683.

3a USB Charger 1x2amp 1x1amp

description: Autonomous 3 seven-segments display powered by an Atmega328P.

features: - small form factor - communication: Serial, I2C, SPI, (bitbanging possible if you want to) - SDM components, soldering by hand is not too difficult. - 5 volts only - Arduino IDE compatible - programmable via ISP by default (or maybe via serial lines with a different bootloader) - crystal 16Mhz, 20MHz (or whatever or internal if you want to) - 2 support holes for 3 mm screws

Main part list: 7-segments common cathode led display, ATmega328P, quartz 20MHz, resistors, capacitors.

==> See this Github for more info!

Arduino to 13 LED Drivers that can drive LEDvf*N-Vpwr>1V each

ATTiny85 Breakout v.9

Just a little board to work with the cheap SMD ATTiny 85.

ATTiny 85: http://www.digikey.com/product-search/en?pv7=2&k=ATTINY85-20SU-ND&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

You can use an Arduino as ISP: http://www.instructables.com/id/Program-an-ATtiny-with-Arduino/

NOTE: If you see the following it means you’ve programmed the ATtiny85 successfully:

“avrdude: please define PAGEL and BS2 signals in the configuration file for part ATtiny85”

It’s an error, but one you can ignore :)

LMX9838 breakout board

STM32F4 discovery injector drive board

Pan/Tilt/Dolly camera control for timelapse photography. Controls three Easydriver stepper motor drivers from an ATMega328. The camera is controlled via optocouplers. The circuit can also be used for a CNC router.

Simple breakout board for the Atmel 328P

Simple breakout board for AtTiny 85

[TESTED: WORKS] Very simple LM386 based single channel audio amp. Use R3 to adjust gain.

• IC1 = LM386
• C1 = C3 = 220uF
• C2 = 10uF
• R1 = R4 = 10ohm
• R2 = 1kohm
• R3 = 10k pot (Adafruit ID 356)
• Terminal Blocks (Adafruit ID 724)