This sound effect circuit is from a Radio Electronics magazine from December 1969. The transistors support equivalents and the power is provided by a battery to reduce the possibility of noise.
This circuit for receiving or transmitting low power was found in old American documentation. It is...
Suggested by the 90s ARRL Handbook edition, this circuit aims to reduce or cancel noise at the...
This circuit allows you to read capacitances on a common analog instrument. It is part of an...