Shared Projects

LSM9DS0 9-axis motion sensor and LPS25H pressure sensor add-on board for Teensy 3.1 with hardwired I2C

16-ch low-side 12V switch, RPI expansion

reprap axis control breakout

Dual h-bridge motor driver and solenoid driver with an Arduino compatible controller

Generates a random snowflakes slowly filling a Matrix 8x8 from bottom to top. The snow melts too so the top is rarely reached.

A standard MAX7219 8x8 LED matrix module from eBay (not included) is controlled by ATTINY85 controller. Buttons change effect speed.

With own software this can be used for other applications as well. I used same module for dice and another game with MAX7219 driving eight 7 segment displays.

Have fun!

OpenTekModule v0.03

Adapt E14 Fuel Tank boosterpack to Hercules Launchpad

Audio limiter/leveler by W2AEW, checkout these videos: https://www.youtube.com/watch?v=1h0FZJYXQ_w and https://www.youtube.com/watch?v=pUii_pDQxg8&list=UUiqd3GLTluk2s_IBt7p_LjA

LED bar graph battery meter for single cell LiPo cells

Motor PCB with Labview controller

I use these boards to make inline voltage regulators for my trail cameras. A piece of ¾" heat shrink will cover it nicely then put a small plastic zip tie on each end. I usually then put a couple drops of super glue in the ends. The LM350 or LM350T VR’s work the same. Both are thermal protected and will shut down when they get to hot. I have had them running when they were to hot to touch. For game camera use a heat sink will not be needed. Nor are capacitors needed when using a battery as the source (no transients). I use this long board because the VR will fold down nicely making a neat package for the heat shrink tubing. The LM350 series are rated at 3 amps continuous, with heat sink. Non of my cams drain more than ½ amp while in operation.

Input voltage must be between 3V and 30V DC and at least 3V more than desired output voltage. Quiescent current is about 5ma which equates to about 1Ah drain per 8 days use.

BOM

R1 = 200 Ohm R2 = 1K = 7.0V 1.5K = 9.7V 2K = 12.6V VR = LM350T

16 Channel analog/digital I/O board for Raspberry Pi

4 band audio filter

Power Supply and PreAmp for Spectrum Display

tv be gone mini

This board is a meta-breakout board for Pololu’s DRV8825 stepper driver module, designed to hold a custom-machined heatsink, capacitor, screw-terminal connectors, and an indicator LED for fault conditions.

• C1 is a Panasonic H13 100µF 63V electrolytic capacitor (EEE-TK1J101AQ).

• D1 is an 1206 red LED - OSRAM’s LH N974-KN-1

• Q2 is a P-channel MOSFET - NXP BSS84,215. Q1 and R1 are non-existent.

• R2 is an appropriately-sized 0805 current-limiting resistor for your choice of LED.

• JP3 and JP4 are 2 and 4 position 3.5mm screw terminals. Phoenix 5452604 and TE 284391-2 work.

$2.62 each ($7.85 for 3)

https://bitbucket.org/serisman/pcb-camaro-line-lock

CNC daughtercard for Raspberry Pi