Serial data at 9600bps Clean edge Not so clean edge MIBAM waveform MIBAM waveform Confused trigger This trigger point looks right MIBAM Confused trigger MIBAM MIBAM - OK ISR run time MIBAM - delayed interrupt MIBAM - bad ISR runtime MIBAM MIBAM - trying to get it to trigger MIBAM MIBAM Confused trigger Confused trigger MIBAM Dirty little bugger Dirty little bugger Solder joint fatigue Some signal More details Now with a voltage regulator TSOP-ed my kitchen lights ATtiny85 prototype ATtiny85 IR receiver He's dead Jim! ATtiny85 IR receiver Finally usable wire! Lets see... DO NOT EAT Not enough space Not enough space Boxed up Just two - ATtiny84 Humidity check Humidity check Humidity check FRAM The ST-500 works nicely Hrmph! ST-500 wire stripper