I'm contemplating building a small temperature control enclosure for testing various electronics.
I have a handful of peltiers suitable for the purpose, and was pondering the right control mechanism. Most people would reach for a NTC, put it in a wien-brige etc etc. But since I happen to have access to much more stable frequencies than voltages, I thought of a different way: 1. Mount a X-tal-osc with really lousy tempco inside the enclosure. 2. Compare its output to a stable reference frequency. 3. Use the output of the phase comparator to drive the Peltier. It is basically a PLL where temperature is used as EFC... Has anybody tried that ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
