Thermometer (CB19856E)

The sensors and integrated circuit used in this circuit are uncommon today. However, it is worth the configuration for the purpose of consultation.

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Proximity sensor (CB8766E)
This proximity sensor was found in a 90s Popular Electronics. The base is a PLL567 that operates...
Rainwater Collector (CB18143E)
In this circuit, we have a sensor that consists of a phenolite plate with a labyrinth of fillets that...
Varicap Tuning Circuit (2) (CB13345E)
This circuit is from a 1976 technical documentation. In it we have the way of tuning a circuit using...