Found in the August 1994 issue of Electronics Now, this CMOS circuit uses the 4046, which is uncommon today.
This network can be used in a sound project to control the tone. The circuit is from an...
Published by Philips in 1965 documentation, the sensor for this circuit is a common LDR. The...
This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old...