Shared Projects

Cost: $18.70 for three.

Description:

I needed a low voltage, low current DC power supply for a mains-powered project but I was out of spare wall warts, so I whipped this together and it does the job nicely.

Holes along the edges of the board are sized for M3 x 4mm standoffs and M3 or #4-40 hardware.

The transformer footprint will accept the Triad Magnetics F16-070-C2-B (max 70mA) or F16-150-C2-B (max 150mA). I used the latter. The transformer’s secondary windings are wired in series.

The bridge rectifier footprint will accept any 4-SIP package with 0.2-inch pin spacing and max 0.050-inch pin diameter. I used a GBU-package device that I had on hand.

The TO-220 footprint will accept any of the 78XX series of fixed output linear regulators. I have tested with the ON Semiconductor NCP7812TG and measured ~40mV peak-to-peak output ripple with 100mA load. The regulator settles at ~48°C under this load with no heatsink.

The large electrolytic capacitors are 10mm diameter with 5mm pin spacing. I used two Kemet ESK108M025AH4AA 1000uF 25V caps. The small electrolytic is 5mm diameter with 2mm pin spacing. I used a Kemet ESK107M016AC3AA 100uF 16V cap.

To simplify and save cost, the board has exposed copper pads for AC input and DC output connections instead of screw terminals. Apply a little flux and wires will solder on with ease.

CAUTION: This is a mains-powered circuit. Use appropriate care with exposed high voltage and please install a properly rated fuse inline with the hot AC supply line.

3D printing cape for the BeagleBone, based on the RAMPS-FD design for the Due. Details Source Files

This will solder directly to the SparkFun Electric Imp breakout https://www.sparkfun.com/products/11400 and adds RS232 Serial voltage levels to the Imp. Power and serial are all through an RJ12 6 pin connector. 1-GND, 2-+5V, 3-Tx232, 4-Rx232. Uses Uart57 on Imp. Chip is Max3232 http://www.digikey.com/product-detail/en/MAX3232CSE%2B/MAX3232CSE%2B-ND/947902 and all will fit very nicely inside this enclosure…. http://www.pactecenclosures.com/product-detail.php?productid=1393&seriesid=82&classid=25

ECE3440 I/O Expansion Board (Rev4)

Rev 2.3

Breakout board for MAX21100 a low-power, ultra-accurate 6+3 DoF IMU from Maxim Integrated.

Eagle files can be found at Github.

External comparator for Radiation Watch Type 5 Detector

DW brushed multiwii

General purpose bidirectional amplifier

cpu atmega1284p

Servo mechanism controller for a brushed DC motor

NEC RGB

Left Side Booster for Double Boost Version 1.1

Version 1.1 of the 9V to 18V Charge board

AVR Xmega E5 series breakout with PDI and 3.3v regulator

The Tinusaur - a minimal micro-controller hardware configuration based on Atmel AVR ATtiny family of products and more specifically those with DIP-8 case such as ATtiny25/ATtiny45/ATtiny85, ATtiny13 as well as their variations.

Circuit is available at 123d.circuits.io

The home of the Tinusaur is at this address: tinusaur.wordpress.com

TB62752AFUG_TB1

SHT15 sensor board for VP2

Sequential Taillight Controller