Modem without transformer (CB79029E)

This low speed circuit was obtained in a 1966 Microelectronic Design. The circuit has a 10 MHz passband. The power supply must be symmetrical.

| Clique na imagem para ampliar |

LDR Sensitive Passage Sensor (CB24482E)
This circuit is more sensitive than the previous one, in the sense that we can use weaker and more...
100-second monostable (CB25671E)
This 3-transistor timer was found in the January 1994 issue of Electronics Now magazine. The...
Bistable with two 555 (CB1294E)
This circuit appears in other articles in this section, but it is very interesting. It is a...