P1 on this Radio Shack circuit is a 6 V lamp with current up to 500 mA depending on Q2. The frequency is given by C1 which can have a modern standard value such as 3.3 uF or even 4.7 uF.
This power supply, found in 2002 documentation, uses fixed 1 A regulators for the power output. The...
This two-microphone amplifier was found in a April 1961 Radio Electronics Magazine. The circuit is...
May 2017 - Mouser Electronics is providing Murata MHM306, 305 and 500 ionization and ozonation...