Shared Projects

upload test 1

test boards for TI POV Badge

1 channel Logic analyzer for Android phones.

-1MSPS AD converter. -cyclone fpga (overkill) -1Mbit SRAM sample buffer -ftdi (usb to uart) -usb mini

LC Filter + 5/12V Buck regulator

MySensors Rev.2

Breakout board for TLC59281DBQR

REVISED TVP5151 for GUMSTIX OVERO

Auxillary Test Board for Main board tester

Constant voltage 4 channel LED driver for maple mini and STM32F103 clones

Mutable Peaks DIY

ESP-07 / ESP-12 breakout board

• IC1 AMS1117 3,3V Vreg
• MicroUSB connector
• Tactile switch for programming mode
• C1 10uF 0805
• C2 10uF 0805
• C3 0,1uF 0603
• R1 10k 0603 Pull-up to 3,3V
• R2 0Ω 0603 “Solder bridge”
• R3 0Ω 0603 “Solder bridge”
• R4 0Ω 0603 “Solder bridge”

When the switch is pressed it ties GPIO0 to GND through R2. This should be done during power up to enter programing mode.

R3 ties CP “CH_PD” to VCC. It should be so except for power down mode.

R4 ties GPIO15 to GND for both normal and programming mode.

This is a two axis brushless gimbal controller board based on Sparky. It uses an F3 processor and can be controlled via a CAN bus from the main flight controller, or used as a standalone gimbal controller. It uses a switching supply to run efficiently and directly from the battery.

Design files can be found on github

SSR Controlled AC Line

Amplifier

Breakout board for 3 & 5 lead D-PAK packages, with pad

ST Microelectronic’s ultra-low-power real time clock coupled with Bosch’s BMP280 pressure 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. Added ST Microelectronics' HTS221 16-bit, ultra-low-power relative humidity sensor. The board is now a tiny weather logging station: pressure, temperature, and humidity can be logged once per minute for 15 days!

Arduino EEPROM Programmer