Velleman projects K1823 Assembly instructions - Manual (Page 6)

6
Connection example
9. Connection example
Execute the connection as
depicted in the figure. Connect
the alternating voltage of a
transformer with the ‘AC IN’
connections. Connect the
output voltage with the ‘+’ and
‘-‘ connections. Set the desired
output voltage with trimmer
RV1. Mount VR1 on a suitable
heatsink for applications
requiring more power.
Be sure to provide sufficient
electric insulation: fit an
insulator and a plastic
insulation ring between the
VR1 and the heatsink because
the metal side of the VR1 is
electrically connected with the
rest of the circuit.
Replace the trimmer with a
potentiometer of the same
rating if you want to use the
circuit as a permanently
adjustable power supply.
Fig. 1.0
FUSEHOLDER
FUSE 250mA T
STRAIN RELIEF
AC POWER
ON-OFF SWITCH
TRANSFORMER
ENCLOSURE
Mica washer
TO220
isolator
DC OUTPUT
+
-
DC output adjust
SI
LI CO
N
GR
EA
SE