Alarm with NC sensors (CB25724E)

This alarm circuit with sensors in series was found in the Electronics Now magazine of June 1994. The circuit is powered according to the relay used.

| Clique na imagem para ampliar |

Passage Relay 555 CMOS C (CB15871E)
In the figure we have the shot made by an interrupted light beam using a phototransistor or a...
Sine to square converter (CB21989E)
Using a CA3130 operational amplifier, this circuit from a 1977 documentation can handle low...
Receiver for Optical Audio Lin (CB1365E)
This is the receiver for the CB1364E transmitter. Other receivers can be found in this section of...