This circuit is intended to recover a very weak signal at a receiver, for example, a CW signal or a tone signal. The circuit is from a Popular Electronics from the 90s.
This circuit was found in a 90s Motorola documentation. The circuit uses two SCRs that must be...
This digital didactic digit counter uses common TTL integrated circuits and a common anode...
This well-known circuit version of the siren was obtained in a Colectro Handbook from the 70s. The...