fringe monitor circuit

Holography related topics.
a_k
Posts: 190
Joined: Thu Jan 15, 2015 10:52 pm

fringe monitor circuit

Post by a_k »

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
Joe Farina
Posts: 801
Joined: Wed Jan 07, 2015 2:10 pm

fringe monitor circuit

Post by Joe Farina »

a_k wrote:The data loggers fixed resolution of 40mV is not sufficient for a 500mV signal. The $59 looks a bit overpriced too.
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.
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