This circuit was taken from the 1967 General Electric SCR Manual. The circuit can use virtually any unijunction and SCR according to load.
We found this circuit in an American publication from 1977. The circuit drives two LEDs according to...
We found this circuit in a 1972 RCA technical documentation. The comparator can be any type and C1...
Similar circuits can be found on this site. This is from an 80's American documentation. The...