Shared Projects

Rockford <–> Atmel JTAG-A

SunnyBuddy-v1.3

2 layer board of 1.86x1.86 inches (47x47mm). $17.20 for three.

SparkFun Sunny Buddy - MPPT Solar Charger

Description: This is the Sunny Buddy, a maximum power point tracking (MPPT) solar charger for single-cell LiPo batteries. This MPPT solar charger provide you with the ability to get the most possible power out of your solar panel or other photovoltaic device and into a rechargable LiPo battery. Set-up is easy as well, just plug your solar panel into one side of the Sunny Buddy and your battery into the other and you are good to start charging!

The output of the Sunny Buddy is intended to charge a single polymer lithium ion cell. The load should be connected in parallel with the battery. By default, the Sunny Buddy comes set to a maximum charge current of 450mA with a maximum recommended input of 20V (minimum 6V). It’s recommended that batteries not be charged at greater than their capacity rating; thus, the smallest battery that should be charged with the Sunny Buddy is 450mAh.

Each Sunny Buddy comes equipped with a LT3652 power tracking 2A battery charging circuit and pre-installed barrel jack and 2-pin JST connectors with unpopulated areas to install your own personal 3.5mm screw terminals for added input/output options. This revision also adds a potentiometer to the input to set the holding voltage for MPPT and we’ve also tweeked the feedback resistors on the output to change the float voltage.

Or you can DIY in OSHPark purple ;)

RC/LC filter board with SMA connector

Attiny85 break out board with USB for power only, and a JST connector for a lipo battery. This board is designed to be programmed via the ICSP header only! The USB connector only provides power. Part - Manufacturer part number USB connector - 1981568-1 Voltage regulator in a sot23 - mcp1702T-3302E/CB 2 10uF 0603 capacitors for the volatage reg. and 1 0.1uF for decoupling (on the bottom of board) JST connector - S2B-PH-SM4-TB(LF)(SN) Attiny 85 in qa SOIC package and some 0.1 inch pin headers.

usb, micro-sd, crypto jawn

https://github.com/jaw0/usb-crypto-jawn

https://hackaday.io/project/9121-usb-crypto-jawn

The Smartcar shield is an Arduino shield that allows the user to control a small robotic vehicular platform, the Smartcar, in an easy and cost effective way.

It includes an L293D h-bridge for controlling two DC motors, a GY-50 gyroscope module (based on the L3G4200D sensor) as well as terminals to connected the motors and the power supply.

You can find more information about the shield and the software that accompanies it at http://plat.is/smartcar

LM2575-XX Buck Regulator

2 layer board of 0.63x1.32 inches (16x34mm). $4.15 for three.

Got the idea from here

More or less a LM7805 dropin replacement (maybe 40% larger) I designed it for maximum copper pour under the IC for heatsinking, got the initial design from here and just tweaked it out…there are commercial products that do the same thing, are smaller and more than likely much cheaper here and here and here My design is more or less for the DIY crowd…

By getting the 3.3v, 5v, or 12v LM2575 you can have different output voltage

LM2575 3.3v IC here , 5v IC here and 12v chips

C1 and C2 are 100 uF 153 CLV 0605 series metal SMD capacitors here

Inductor L1 is 330 uH DR127 here

Diode D1 is SOD123 here

For grabbing 5V from a usb port

WS2812B led board

small board for murata dc-dc convertor

Teensy add-on for N25Q00AA 1 Gbit SPI NOR flash memory.

AS5040 Breakout Board

Allows SMA/B/C parts to be placed easily onto a breadboard

Allows ease of breadboarding of 0402, 0603, 0805, 1206, and 1210 parts

Allows ease of breadboarding with SOT23 parts

Teensy add-on board for MT25QL02GCBA8E12-0SIT 2 Gbit SPI NOR flash memory chip.

version 3, Arduino pH Shield

To be used with MES1A05 relay. T1, T2, T3 2n2222

Pixhawk OS Breakout