This detector uses an unusual sensor today. The circuit is from an 80s documentation. Its sensitivity is 10 ppm. The transformer has two secondary voltages.
This configuration (somewhat critical, as the imbalance of characteristics between transformers can cause...
It is a simple blinker that simulates the action of an alarm when installed on the dashboard of a...
This conventional LED effects circuit uses integrated CMOS. Today we can achieve the same effects...