Shared Projects

Breakout board with two independently addressable ST Microelectronics' 2 Mbit (256 kbyte) M24M02-DRC I2C EEPROMs designed to be mounted onto the Teensy 3.1 and use digitalWrite for power and ground due to the very low-power (< 2 mA per EEPROM) requirements. Can also be used as a traditional breakout board since VIN ranges from 1.8 to 5.5 V. Cutting one or both traces between the solder jumpers enables write protect mode allowing access to the data already written but disallowing further write operations. The write protect is reversible by simply soldering the junction again. Operating temperature range is -40 C to +85 C making this an ideal solution for portable/remote data logging when power and space are at a premium. EEPROM write operational for 4 million write cycles and data is retained for 200 years! Minimized width to make it even more appallingly small!

ST Microelectronic’s ultra-low-power real time clock coupled with Measurement Specialties MS5637 pressure and temperature sensor and ST’s M24512DFM 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 512 kbits (64 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 1N4148 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 15 hours.

with PT4115

with 6n137

A new version of my successful UVLO circuit. This one has pushbutton power off in addition to the on that the previous had. It still uses an Atmega85, and the firmware for that chip is still important to the proper functioning. Ping me if you want it.

Screw terminals (TE 282834-5) to R/A male header (Molex 22-28-8050) for use with Microchip’s PICkit In-Circuit Debuggers.

5W VALVE GUITAR AMP

GEETAR DISTORTION STOMP BOX

I2C RTC Module V1

DDS board - PIC32 and AD9850. See lkeng.org for info as it becomes available.

tiny attiny10 breakout, should fit a breadboard, space is for a bypass cap

Used with LiPo JST connector and breadboard. 1.60$

DGP - Vox Treble Booster V1.0

*** Status is currently: Verified

Build Doc: Link

diyguitarpedals.com.au

Halogen T3 RSC bulb substitute. Rectifier circuit drives Cree HVW LEDs with PowerPeg thermal connectors

https://groups.yahoo.com/neo/groups/k6bez_projects

https://github.com/frankalicious/de0nano_ethernet

Stolen from http://codeandlife.com/2012/03/03/diy-usb-password-generator/

Install this device into your USB port and it will print the current password. Password can be changed with a few key presses (see video on above website).