Velleman projects K7203 Assembly instructions - Manual (Page 8)

8
Depending on the output voltage needed, one should chose the right transformer for connection to the circuit
according to the table in the parts list. If one choses too high an input voltage, it may well be so that the
power transistor is overheated.
The secondary winding of the transformer is connected to the AC points. It may be that the transformer has
two secondary windings which should be connected either in parallel or in series. The colour code can be
found on the packaging.
For safety reasons, the primary winding of the transformer is connected to the mains voltage via a mains
switch and a fuse. The rating of the fuse can be selected from the table in the parts list.
Connect a voltage meter to the points ‘GND’ and ‘+OUT’ and adjust ‘RV1’ until the desired output voltage
is reached.
Connect the circuit to be supplied by the present unit between the points ‘GND’ and ‘+OUT’. Watch the
polarity!
12. Connection
Connection