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 circuit was found in a documentation for radio amateurs from the year 70. Its purpose is to...
This circuit is from old documentation and can be assembled with 2N2646 for the unijunction and...
This circuit for tape recorders was found in the February 1990 Radio Electronics magazine. The...