Shared Projects

Optical Quadrature Encoder. Input voltage can be from 5V to 12V. Output voltage can be 5V or 3.3V

See https://hackaday.io/project/5631-charles-jr

Kilobot Overhead Controller for Arduino (Pro Mini, Pro Micro, Nano)

Wulf Breakout Board for Power and Data

V02

Clock generator

ST Microelectronic’s ultra-low-power real time clock coupled with Bosch’s BME280 pressure, humidity, and temperature sensor and ST’s M2402DFC 2Mbit EEPROM in an appallingly small add-on board for Teensy 3.1. Power is supplied via digital write to general GPIO pins since the total power requirement never exceeds 2 mA. Communication is via I2C and there are 4K7 pullup resistors on board. The temperature sensor allows the Teensy 3.1 microcontroller to make periodic calibration updates to the RTC calibration register so the clock remains temperature compensated for maximum (~2 ppm or 1 minute a year) accuracy. The clock outputs the usual date, days, hours, minutes, etc. but also outputs tenths of seconds as well as hundredths of a second.The on-board EEPROM is useful for data logging and storing alarm patterns (music) for output to a small speaker. With 2 Mbits (256 kBytes), lots of data can be logged and dozens of alarm sounds can be stored; one for every occasion! Added Taiyo Yuden PAS3225 2.6V 14 mF super capacitor and Comchip low forward voltage Schottky diode to provide power to the RTC time keeper even when disconnected from the microcontroller. The PAS3225 5 microAhour super cap can run the RTC (which needs ~330 nA at 2.6 V) for about 18 hours. The board is now a tiny weather logging station: pressure, temperature, and humidity can be logged once per minute for 15 days! Changed IRQ so pullup voltage provided on RTC side of the diode.

Wearable Rev 02

Development

Enabler for 7u spacebar

Enabler v3.0 2u keys

MX/Alps pcb with no stab holes

The low cost and easy to make Mighty1284P WiFi DIP Module for breadboard prototyping. Made with all through hole components. Use the new core and exact same pinout of the original maniacbug Mighty 1284P 16MHz prototype board. Other features include the ESP8266 connector, reverse polarity protection diode, reset button, and D13 LED indicator. See details at: http://www.firebirduino.com/mighty_stick/

Pressure & Valve Controller Arduino Shield

53.125 MHz 3rd Overtone VXO

XBee Board. Includes 2.54mm screw terminals for two sensors.
1. One is active low, using the xbee pullups. This is a two wire hook-up, simple switch (DIO and ground).
2. One is powered and assumed active high, with internal sensor pulldowns. This is three wire hook-up (DIO, positive, ground).
3. Micro USB connector to provide power only.
4. LEDs for power and RSSI.
5. Works great.
6. Use one on my mailbox under battery power with one reed switch.
7. Leave the power LED unpopulated for better battery life.

1. Uses an ATTiny 25/45/85 8SOIC to control common LEDs (WS2801 or APA102).
2. Reset button advances sequence in code, with pins included for additional remote reset button.
3. Program with 8SOIC Test clip, there are no ICSP pads.
4. This is very small.
5. Works just fine 3.3V and 5V. One Li-Ion battery is perfect.
6. I am using these in various projects. With a 20 mhz resonator they can do some impressive POV effects in flow toys (poi/staff).

Read and program Midland radio Z-273 memory modules.

Bill of materials: http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=1110b692f1

Build instructions: http://dbindner.freeshell.org/z273/build.html

Operating instructions: http://dbindner.freeshell.org/z273/index.html