Thanks for clarifying the schematic, the arrow makes sense now.
The data loggers fixed resolution of 40mV is not sufficient for a 500mV signal. The $59 looks a bit overpriced too.
Have a look at this one with 8 analog + 14 digital I/O ports + SD card reader for data logging:
http://www.ebay.com/itm/Data-Logger-Mod ... 5d430c675d
The base board:
http://www.ebay.com/itm/UNO-R3-DIY-Modu ... 3f27ad53bf
A temperature/humidity sensor:
http://www.ebay.com/itm/DHT11-DHT-11-Di ... 5d3f09ef4d
fringe monitor circuit
-
Joe Farina
- Posts: 805
- Joined: Wed Jan 07, 2015 2:10 pm
fringe monitor circuit
Thanks, I should have seen that, 40mV resolution isn't enough for such small variations in voltage. Thanks also for the links to the Arduino-related components.a_k wrote:The data loggers fixed resolution of 40mV is not sufficient for a 500mV signal. The $59 looks a bit overpriced too.