Delptronics Thunderclap - Manual (Page 9)

Thunderclap Kit Instructions V2
Page 9 of 11
Stompbox Power (±)
If your Thunderclap is a stomp box, the simplest way to connect the power is to connect wires straight from the power
jack to the PCB. Then, the unit is powered on when the power supply is plugged in. Connect the positive to either of
the holes marked V+, and the negative to any of the six holes marked GND. The holes marked V- are not used.
9V Battery Snap
If you would like run your Thunderclap on battery power, you can connect a 9V battery snap (not included). Simply
solder the red (positive) wire from the snap to the Outer Switch terminal of the power jack, and the black (negative)
wire to the Ring terminal of the output jack. When connected as described, the positive power from the battery is only
connected when the power adapter is not plugged into the power jack, and the negative power from the battery is
only connected when a plug is inserted into the output jack. The diagram below makes it clear how this works.
Power LED (±)
If your Thunderclap is a module, then no power LED is needed, since the module is on when our rack is powered on.
Refer to the diagram below. The cathode (negative) lead of the LED is shorter than the anode (positive) lead. The
points to be soldered are marked with an asterisk. The cathode of the LED is soldered to a wire, which is then
connected to the negative power supply. The anode of the LED is soldered to a resistor. A 1K Ohm resistor will work
well for most types of LEDs and voltages. The other end of the resistor is soldered to a wire, which is then connected
to the positive power supply. After soldering the wire and resistor to the LED, use electrical tape or heat-shrink tubing
on one or both sides to ensure that no bare wires touch.
If your kit came with an LED that is already in a holder with the resistor and wires already attached, then simply
solder the wires to the power supply. The red wire is positive and the black wire is negative. The LED assembly is
inserted into the enclosure from the outside, with the retaining nut on the inside. Therefore, it must be inserted
through the hole in the enclosure before you solder the wires.
If you are using a power switch (either an actual switch or using the output jack as a switch), make sure you connect
the LED at the same point as the wires that go to the PCB. Otherwise, the LED will be on and will drain power even
when the unit is off.