ISD1016 Voice Recorder (CB25448E)

This 16-second voice recording circuit was featured in a telephone answering machine circuit in the March 1992 issue of Radio Electronics magazine.

| Clique na imagem para ampliar |

Microphone preamplifier (CB9311E)
Found with variations on this site, this circuit was taken from an American documentation from the...
Neon flasher (CB23661E)
Found in a Radio Electronics magazine from March 1950, this circuit uses a high-power neon lamp...
Up to 60 V x 5 A power supply using the 741 II (CB1218E)
This circuit was obtained in an 1975 English publication. It is a voltage regulator circuit for...