This interesting digital counter with relays with complementary outputs was found in the Radio Electronics magazine of October 1961. The supply voltage is in accordance with the relays used.
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...