We found this circuit in an old Popular Electronics. The circuit is experimental, driving an LED from signals applied to the LDRs. The power supply does not have to be symmetrical.
We found this circuit in an old American documentation. Accuracy has 0.02% error and 0.003%...
September 2016 - Mouser Electronics is offering the new oscillator clock PECL series PE55K of the...
Found in a Philips documentation from 1968, this circuit detects the trimpot set input voltage....