nº890

C-L-C oscillator with JFET transistor.

nº889

Wireless receiver activates wireless transmitter when they are closely aligned otherwise wireless transmitter sends a beacon with minimum current consumption, supply 1xNiMH.

nº888

Beep-Beep alarm with 1 transistor + 1 resistor + 1 LED + 2 capacitors, supply 12V.

nº887

Intermittent beacon for the MW band with 1 bipolar transistor, supply 2xNiMH.