Jack Christensen

JC_Button. Arduino library to debounce button switches, detect presses, releases, and long presses

DS3232RTC. Arduino Library for Maxim Integrated DS3232 and DS3231 Real-Time Clocks

Timer. A fork of Simon Monk's Arduino Timer library

Timezone. Arduino library to facilitate time zone conversions and automatic daylight saving (summer) time adjustments.

tinySPI. Arduino hardware SPI library for ATtiny44/84, 45/85, 461/861, 2313/4313.

extEEPROM. Arduino library to support external I2C EEPROMs.

movingAvg. A simple Arduino library for calculating moving averages.

mighty-1284p. Mighty 1284P Platform for Arduino

MCP79412RTC. Arduino library for the Microchip MCP79411/12 Real-Time Clock/Calendar

JC_EEPROM. Arduino library to support external I2C EEPROMs.

mini1284. A minimal breadboard-friendly design for the ATmega1284P MCU

CurrentTransformer. Arduino Current Transformer Library

usb-condom. A little something for the tinfoil hat crowd.

Thermocouple. Thermocouple library for Arduino and MAX6675

millionOhms_SW. Warning One Million Ohms (firmware): Amuse your friends and confuse your enemies! Keep the uninititated away from your desk or out of your lab!

PowerOutageMonitor_SW. Sketch for an Arduino-based Power Outage Logger

PowerOutageMonitor_HW. Arduino-Based Power Outage Logger PC Board

serialLogger. An Arduino-Compatible Serial Data Logger

JC_Sunrise. Arduino library to calculate sunrise and sunset times.

TinyWireM. My modifications to the TinyWireM library from the Arduino Playground

gpsFreq. Arduino frequency counter library, uses a 1 Hz (PPS) signal from a GPS receiver as an accurate time base

MCP9808. Arduino Library for Microchip MCP9808 Maximum Accuracy Digital Temperature Sensor

tinyTorch. Hardware design for a small LED flashlight powered by an ATtiny84A.

nightLight. An Arduino-based demonstration/educational project with several interesting hardware and software features.

rtc79412. Breakout Board for the Microchip MCP79412 Real-Time Clock/Calendar

geiger. Firmware for the MightyOhm Geiger Counter

tinyTorch-fw. Firmware for a small LED flashlight powered by an ATtiny84A.

aaLogger_SW. Code for the Double-A DataLogger - A low-power Arduino-based data logger.

ds18b20. C++

ledFire_FW. LED PWM Fire Effect using ATtiny84A (firmware)

FiveLEDs. My spin on Technoblogy's Five LEDs Puzzle.

GroveStreams. GroveStreams Library for Arduino

CurrentMonitor. Arduino-compatible board to measure AC mains current with current transformers

ledFire_HW. LED PWM Fire Effect using ATtiny84A (hardware design)

Vetinari_HW.

Vetinari_SW. Arduino

larson84. Firmware for the tinyLarson scanner

aaLogger_HW. Schematic and board for the Double-A DataLogger - A low-power Arduino-based data logger.

bbhTinyX5. ATtinyX5 Breadboard Helper, the easiest way to breadboard an ATtiny microcontroller!

jc_MAX31856. Arduino library for the Maxim Integrated MAX31856 Thermocouple to Digital Converter

jcGoldieClock. My firmware for LarryD's Goldie Clock

five-leds-puzzle. Press the buttons to light up all the LEDs

tinyLarson. Larson scanner powered by an ATtiny84a

MCP9800. Arduino Library for Microchip MCP9800/1/2/3 2-Wire High-Accuracy Temperature Sensors

piXBee. Interfaces Andrew Rapp's XBee-Arduino library to C++ running on a Raspberry Pi.

Arduino-Breadboard-Helpers. Two small breakout boards that make building an Arduino-compatible breadboard a snap!

ac-timer-panel. Small PCB to support switch and LEDs for AC timer project.

Trace. Bash script to run traceroute for a given IP and log the results to a file.

dehumid. A daily timer sketch for Arduino to control a 120VAC appliance according to a schedule with a solid-state relay.

XmasTree. Sketch to drive LEDs for a small ceramic Christmas tree.

ac-timer-hw. Arduino-based daily timer for AC appliances.

backup. A simple rsync backup script

aaXBee. Arduino-based wireless sensor node using XBee-ZB. Powered by two AA cells.

DHT-sensor-library. Arduino library for DHT11DHT22, etc Temp & Humidity Sensors

dotstar4. Simple board to hold four APA102C addressable RGB LEDs.

rtc7941x. MCP78411/12 RTC Break-Out Board with MCP9800/2 Temperature Sensor

gsXBee. Arduino XBee Library for GroveStreams Wireless Sensor Network

MQTT_Mailer. Arduino library to send email using MQTT and a Python program.