This sequential circuit appears in other versions on this site. This is from American documentation from the 1960s. The speed of the effect is set to R1.
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...