Radiation thermometer (CB7242E)

Found in a 1968 Mullard manual, this circuit measures temperature by infrared radiation. The sensor is of the type that is difficult to obtain today.

| Clique na imagem para ampliar |

5-Channel Sequential with 20 LED (CB12141E)
We found this circuit in an English publication in 1982, but it can still be easily assembled by...
Xenon Trigger (CB6798E)
This circuit was obtained in a 1967 General Electric documentation. It alternately fires two xenon...
Neon Flasher (CB17307E)
This is a traditional flasher configuration with two neon lamps. The frequency is given by the 100 nF...