User manual
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau
(www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microlming,
or the capture in electronic data processing systems require the prior written approval by the editor.
Reprinting, also in part, is prohibited. This publication represent the technical status at the time of
printing.
© Copyright 2014 by Conrad Electronic SE. V2_1114_01/HD
• Is the transistor soldered the right way round? The housing form must match the component
diagram.
• Is the LED inserted the right way round?
• Is there a ‘cold’ soldering joint? Check each solder joint thoroughly! Check using tweezers, if
components wobble. If a solder joint looks suspicious, you should solder it again for the sake
of safety.
• Is there a solder bridge or a short circuit on the side of the solder? Compare conductor trace
connections, that may look like an unwanted solder bridge, with the trace image of the imprint
placement and the circuit diagram before you interrupt a circuit connection (supposed solder
bridge)! In order to determine trace connections or interruptions easier, hold the circuit board
against a bright light.
• Check whether each solder point is soldered; it often happens that solder joints are over-
looked.
• Always remember that a circuit board that is soldered using soldering uid, soldering paste
or similar uxes, or when unsuitable solder is used, may not function. These materials are
conductive and cause current leakage and short circuiting.
Practical tips
• Optimally, the microphone should be aligned as such that it points to the direction where you
want to trigger the clapper switch. Do not obstruct the microphone with other devices.
Or else you have to increase the sensitivity, which may result in false triggering of low sounds.
• To activate he clapper switch you may use a power adapter for example with an output volt-
age of 12 V/DC. If you do not want to cut off the plug, use a suitable socket, which can be
connected to the clapper switch’s terminal clamps using a piece of wire. In that case, strictly
observe correct polarity; use a suitable meter, if necessary.
Disposal
Please dispose of the product according to the relevant statutory requirements at
the end of its useful life.
Technical Data
Operating voltage .........................11 - 15 V/DC (stabilised)
Power consumption ......................quiescent current: 5 mA
......................................................Relay energized: 50 mA
Switching voltage/current .............max. 24 V (AC or DC), max. 2 A
......................................................or 230 V/AC, 50 Hz, max. 500 W
Warning!
Only a technician (qualied electrician, electrical worker) is permitted to con-
nect a load to a mains voltage of (230 V/AC, 50 Hz). Otherwise, there is a risk
of a life-threatening electric shock!
Dimensions (L x W x H) ................83 x 46 x 20 mm (ready built up assembly)
Component diagram
Connection/Startup
After the board has been equipped and checked for possible errors (bad solder joints, solder
bridges), an initial function test can be carried out. Proceed as follows:
• Turn the adjuster control of the trimming potentiometer on centre position, approximately.
• Place the board so that the contacts at the bottom do not contact any metallic surfaces,
place it on a magazine or a book, for example. Also make sure that the metal housing of the
microphone capsule is not in contact with the circuit board or any components, which may
also trigger a short circuit.
• Connect the terminal clamps marked with “+” and “-” with the correct polarity to the operating
voltage (11 - 15 V/DC). Reverse polarity destroys the clapper switch, the warranty will be
void!
Warning!
Only a stabilized DC voltage of 11 - 15 V/DC such as a suitable power adapter, must
be used for the clapper switch.
• If you clap your hands now, the relay should be energized and the LED should go on simul-
taneously.
The function differs, depending on the position of the switch S1. In switch position “MEM”,
the relay alters its switching status with each hand clapping. In the other switch position, the
relay energizes shortly and switches back again.
• Now you can set the trimming potentiometer to the desired response sensitivity (turning to the
right = increases sensitivity; turning to the left = reduces sensitivity).
If the function test is unsuccessful, disconnect the clapper switch from the operating
voltage. Proceed as described in the following check list.
• The switching contacts of the relay are connected to the screw terminals “C”, “S” and “O” but
current does not ow. Next to the screw terminals is the circuit diagram of the relay.
If the relay is activated and the LED on, then the terminal clamps “C” and “S” are connected. If
the relay is deactivated and the LED off, then the terminal clamps “C” and “O” are connected.
Check list for troubleshooting
• Is the operating voltage polarized correctly?
• Is the operating voltage 11 to 15 V/DC?
• Are the resistors soldered right?
• Are the electrolytic capacitors soldered with respect to correct polarity? Compare the polarity
printed on the electrolytic capacitors with the component diagram or layout diagram attached
to the circuit board. Note that depending on the brand of electrolytic capacitors “+” or “-” may
be indicated on the component!
• Are both ICs placed in the socket and is the polarity correct?
• Are all IC pins in the socket?