This amplifier is from a 1990s Linear Technology component manual. The circuit requires symmetrical power supplies.
This VCO or Voltage Controlled Oscillator uses common components. TR1 can be a BF245 and TR2 a...
This control for a heating element was found in an old documentation. The current in the element...
By pressing and releasing PB1, only one LED is lit, drawing a number from 1 to 6, as in a die. The...