Laser source diode (CB7840E)

This circuit for battery powered laser diodes was found in a 1992 RE Experimenters Handbook. The circuit uses common components today.

| Clique na imagem para ampliar |

Light Triggered Flip Flop (CB148)
When a pulse of light reaches the sensor [a CDs cell or LDR] the flip-flop changes its state....
Line transformer (CB23710E)
This circuit is an impedance adapter. The circuit is from a Radio Electronics from April 1966. The...
Transistor Test 1 (CB20414E)
This circuit was obtained in an old American documentation serving only for general purpose NPN...