Franzis HT7550 Bedienungsanleitung Seite 7

quencies. The bat detector "translates" these high frequencies
into lower sounds that we are able to perceive. That's why you
will more often hear the bats with this device than you will see
them. With some practice you can hear that a bat is around.
With this device, you can even find out the direction where the
bat is situated. When you have managed that, it will be no lon­
ger difficult to see the animals at dusk.
Have fun assembling your detector and enjoy nature observa­
tion!
Components
The circuit board
The heart of the kit is a pre­assembled
circuit board equipped with the most im­
portant SMD components. SMD stands
for Surface Mounted Device. These compo­
nents are so tiny that it would be very dif­
ficult to solder them to the circuit board by
yourself. Thus the job was done for you by
a pick­and­place robot. Additionally, two
potentiometers and three jacks have been
soldered to the board. You will only have to
connect a few components by wires.
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