nº983

 

"knight rider" with 10 leds, controlled by 1 bipolar transistor, supply 5V 

nº982

 

Led bar with 8 white leds, controlled by 1 transistor, supply 9V

nº981

 

Sensitive regenerative receiver for MW band (550kHz-1,65MHz) with 1 transistor; uses standard low impedance earphones (32+32 ohm), supply 3V.

nº980

 

1 transistor AM band regenerative receiver,loudspeaker output, supply 9V