This filter for frequencies from 300 Hz to 3.4 kHz was found in the February 1995 Radio Electronics magazine. Other operational amplifiers can be experimented, and the source must be dual.
This decoder TTL circuit for 15-channel remote control was found in Selezione Radio, Italian...
This new AMS device consists of a digital color sensor and proximity sensor that also incorporates an infrared...
This alarm with the 555 integrated circuit is from an EDN from the 90s. The circuit directly...