Franzis Do-it-yourself, User Manual

Page: 10 / 20

10
Components on the circuit board
Equip the PCB with the electronic components according to
the layout diagram. First install the coils SP1 and SP2. Both
coils have to be built of the included connecting wire. They
each have three turns with an inner diameter of 5 mm and a
length of approximately 7 mm. Use the electrolytic capacitor
100-µF as winding mandrel. First wind three turns closely ad-
jacent to one another. Then pull the turns apart to reach a total
length of approximately 7 mm. Absolute accuracy is not crucial
here because the coil can still be slightly modified after instal-
lation. Remove the insulation from the wire ends. Only then
pull off the coil from the winding mandrel. Now solder on the
two wires at the bottom. Then cut off the protruding wires with
sharp pliers approximately 2 mm above the circuit board.