ATtiny84 and arduino

Downsizing arduino projects using the ATtiny 45 (8 pin) and ATtiny 84 (14 pin) using the High Low Tech at MIT guidelines

Reference

The following Arduino commands should be supported:

• pinMode()
• digitalWrite()
• digitalRead()
• analogRead()
• analogWrite()
• shiftOut()
• pulseIn()
• millis()
• micros()
• delay()
• delayMicroseconds()
• SoftwareSerial (has been updated in Arduino 1.0)

For sulfide and H2S concentration
http://www.chemetrics.com/Sulfide

Build a box using a laser cutter using helpful online tool at http://boxmaker.rahulbotics.com/