Using the Funky as a remote room temperature node – a DS18B20 solders straight onto its pads, one per room before the heating season.
‘Funky’ sensor in store
The Funky sensor is now in the store, with Tobias Floery’s blessing – PCB only, regular, or with the voltage step-up circuit.
64 800 transmissions
64 800 transmissions on one CR2032: the TinySensor sent power readings every 10 seconds for 7.5 days straight – battery analysis inside.
Getting Funky
The Funky sensor PCBs arrived – an ATtiny84 with an RFM12B on top, barely larger than the radio module itself.
CR2032 powered “current only” remote monitoring
How long can a CR2032 sustain heavy duty work? A TinySensor measuring current and transmitting every 10 seconds, until it dies.
TinySensor v1.4 plans
TinySensor v1.4 plans: still through-hole for easy soldering, with fixes for all the issues found in v1.3 so far.
Power saving techniques for the Attiny84 powered TinySensor
Power saving techniques that let the ATtiny84 TinySensor run for months on a CR2032 – two months of room temperatures and counting.
TinySensor’s SD card power consumption worries (and solution)
The SD card was ruining TinySensor’s coin cell battery budget – measuring the sleep current problem and the fix.
Tiny Sensor plans
TinySensor plans: the ATtiny84 remote sensor goes to a real PCB fab – CR2032 slot, a JeeLabs compatible port, 15 boards minimum.
Home made PCB for the remote temperature sensor
My first home-made PCB: toner transfer and ferric chloride etching for the remote temperature sensor board – faster than any fab house.