Shared Projects

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

Module to manage 12 buttons & RGB lights, arranged in a single strip. This is basically an I/O expander; a Cortex-M0 processor handles all the peripherals. The UART handles both ISP and master-slave communication. Interface is 6 pins (2 power, 2 uart, 1 reset, 1 isp)

with two types of idc connectors, fixed transistor footprint

10440 Battery Charger using the MCP73831/2

Based on the picoBuck 3 channel constant current LED driver by Ethan Zonca.

This version adds another channel and changes the PWM input from screw terminals to a pin header.

https://www.sparkfun.com/products/11850

One to one replacement for the Motorola TTN4010C V.24 board. If you don’t know what this is you probably shouldn’t order this.

http://communications.support/threads/4823-Quantar-V-24-replacement-board

Breakout

Breakout

Breakout Board for the MSGEQ7. BoM: 2x100nF Cap,1x10nF Cap, 1x33pF Cap, 1x200kOhm Res, 1xMSGEQ7 and/or Socket, 1x6pin header

When testing multiple Adaptive Nodes before sending to market or by testing against a scope, this is the board you need. This requires an Adaptive Node SMD board to be attached.

LiPo charger add-on shield for Teensy 3.1

GPS serial and PPS for Raspberry Pi.

Takes an AdaFruit Ultimate GPS module and connects RX and TX to the GPIO serial pins (optionally - solder jumpers to disconnect them are on the board), the PPS output to GPIO 18, adds a CR1220 battery clip on the bottom for warm-start, a U.FL connector for an external GPS antenna and a FIX LED.