This circuit maintains on a flashing LED at a frequency determined by the capacitor. The unijunction transistor can be 2N2646.
Found in a RE Experimenter Handbook from the 90s, this circuit is intended for the use of LEDs in...
Found in old documentation, this fuzz uses the 741 Operational Amplifier. Assembly is simple, but...
November 2016 - The new OLED modulator for displays with 2 x 16 format can be obtained from Mouser...