by Keith Amidon, KJ6PUO and Peter Amidon, KJ6PUN

Here are top and bottom pictures of the initial ATtiny based prototype constructed on regular perfboard using the point to point construction but with separate LEDs instead of a single bicolor LED.

We packaged this second prototype in a small plastic case with an LED reflecting box made of card stock and aluminum and a translucent white plastic diffuser cut from a fluorescent light fixture diffuser, shown partially assembled here.

• Source code for this project
  http://hamradioprojects.com/authors/kj6puo/+time-out/code

• Schematics
  http://hamradioprojects.com/authors/kj6puo/+time-out/schematics

• Boarduino
  http://www.ladyada.net/make/boarduino/

• Arduino Tiny
  http://code.google.com/p/arduino-tiny/

• USBTinyISP
  http://www.ladyada.net/make/usbtinyisp/

• Sparkfun AVR-ISP Shield
  http://www.sparkfun.com/products/11168

• Aaron Lai EMF Detector
  http://www.aaronalai.com/emf-detector

• MOSFET E-Field Sensor
  http://home.comcast.net/~botronics/efield.html

• Field Strength Meter
  http://www.zen22142.zen.co.uk/Circuits/rf/sfsm.htm

License

The Arduino sketches and schematics in this project are licensed under the CC-BY-SA 3.0 license:
http://creativecommons.org/licenses/by-sa/3.0/