Specifications

9
Solder side
Fig.8
 CV1 : 5pF
8. Capacitive trimmer
CV...
SOLDER
SIDE
 LD1 : 3mm RED
9. LED (Check the polarity)
8mm
 IC1 : RV4558, LM258, LM2904
10. IC
(Watch the position of the notch !)
Construction