Sale! Effects Tester Mk II PCB (B-Stock) View larger

Effects Tester Mk II PCB (B-Stock)

A small board to help alleviate some of the effects testing pains.

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More details

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This board simplifies the testing process.  Instead of having to use a breadboard, breakout box, or putting it all in an enclosure, just plug in your guitar, amp, and DC power.  Then hook up four wires to your effects board (9V, GND, IN, and OUT).  Now you're ready to test.

It also allows for a trimpot to help you decide on the brightness of your LED.  Once you find the brightness you like, use the tester pads with your DMM to determine the resistance.

The Mark II now includes an audio probe, charge pump allowing -9V and 18V, and a frequency generator.

B-Stock

This is B-Stock due to three issues, two are related to the charge pump:

  1. Pin 3 of the IC was not grounded.  Simply fix this by jumping pin 3 to the ground of C8.
  2. An additional capacitor is needed to obtain -9V.  Add a 47uF (at least 16V) cap with the negative connected to -9V, and the positive connected to ground.
  3. Socket Q1!  Sometimes the oscillator will bleed into your output.  If that's the case, unplug Q1.

If you don't care about the charge pump, then 1 and 2 are not required.

Layout designed by delyk PCBs

Data sheet

Length 98mm
Width 33mm

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Effects Tester Mk II PCB (B-Stock)

Effects Tester Mk II PCB (B-Stock)

A small board to help alleviate some of the effects testing pains.

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