Delptronics ThunderBell - Manual (Page 7)

ThunderBell Mini Kit Instructions
Page 7 of 10
Pots, Jacks and Trigger Button Wires
Refer to the photo below when installing the pots, 3.5mm jacks and trigger button wires Note that the very short
wires are necessary for installing the PCB into a tight space, like a cowbell. If you are using a larger enclosure, you
should use longer wires.
Potentiometers
The potentiometers (pots) can either be soldered directly to the PCB, or they can be connected to the PCB via wires.
You can even do a combination where one pot is board-mounted and the others are connected with wires. Board-
mounting the pots is most convenient because it means that the PCB will be supported inside your enclosure.
When viewed with the shaft pointing toward you, as in the picture to the right, the pot’s
value is printed at the top. The pins are, from left to right, counterclockwise (anticlockwise),
wiper, and clockwise. The holes on the PCB are labeled CW and CCW to indicate which pin
on the pot gets connected to which hole on the PCB. If you are soldering one or more pots
directly to the PCB, the shafts will point away from the PCB.
There is a tab on the pots that must be removed or it will get in the way when you try to
mount them in the enclosure or panel. Hold the pot in one hand and grab the tab with a
small pair of pliers. Rotate the pliers away from the pot, and the tab will snap right off.
The pot values are as follows:
VR1 (Pitch)
10K linear taper potentiometer
VR2 (Decay) 1M linear taper potentiometer