Found in the November 1999 issue of Electronics Now magazine, this circuit generates a 6.67 Hz signal from a 4.1952 Hz crystal.
The CMOS TLC555 can be gated from external CMOS circuits using the configuration shown here. The...
In the figure we have a two-channel preamplifier with two 741 integrated circuits. The circuit is from a...
We found this circuit in a documentation from the 50's. The transistors are germanium types. The...