Used with infrared remotes at the time, this circuit was found in a 1991 RE Experimenter Handbook. It may not work with the faster remotes control used today.
The gain of this circuit at 1 kHz [and 40 dB falling rapidly when the frequency deviates from this...
When the probes of this circuit meet water, the relay closes its contacts. The circuit is from a May...
This circuit is suitable for use with 1400 kHz range FI receivers. Changes can be made to other IF...