Project 121

2016-07-25

Project 121 is a rugged temperature logger for high heat environments. It uses the ATtiny4 microcontroller with 32 bytes of ram and 512 bytes of flash storage.

tinyavr.jpg

Parts list

Battery Tadiran TLH-5903 http://www.tadiran.com/pdf.php?id=TLH-5903 $12.01 -55ºC to +125ºC 3.0V - 3.6V
CPU ATtiny4-TS8R http://www.atmel.com/images/atmel-8127-avr-8-bit-microcontroller-attiny4-attiny5-attiny9-attiny10_datasheet.pdf $1.01 -40°C to +125°C 1.8V - 5.5V
temp0 Silicon Labs Si7051-A20-IM http://www.silabs.com/Support%20Documents/TechnicalDocs/Si7050-1-3-4-5-A20.pdf $1.95 -40°C to +125°C 1.9V - 3.6V
temp1 Silicon Labs Si7051-A20-IM http://www.silabs.com/Support%20Documents/TechnicalDocs/Si7050-1-3-4-5-A20.pdf $1.95 -40°C to +125°C 1.9V - 3.6V
rtc NXP PCA8565TS http://www.nxp.com/documents/data_sheet/PCA8565.pdf $1.73 -40°C to +125°C 1.8V - 5.5V
analog switch Diodes 74LVC1G3157 http://www.diodes.com/_files/datasheets/74LVC1G3157.pdf $0.37 -40°C to +125°C 1.65V - 5.5V
mem0 ST M24M02-DWMN3TP/K http://www.st.com/web/en/resource/technical/document/datasheet/DM00200595.pdf $3.25 -40°C to +125°C 2.5V - 5.5V
mem1 ST M24M02-DWMN3TP/K http://www.st.com/web/en/resource/technical/document/datasheet/DM00200595.pdf $3.25 -40°C to +125°C 2.5V - 5.5V
regulator TI TPS62230DRYT http://www.ti.com/lit/ds/symlink/tps62230.pdf $1.69 -40°C to +125°C 2.05V - 6V

TOTAL $27.21

Version 1 of the boards

Version 1 of the boards