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Important notes If you’re using any of our footswitch daughterboards, DOWNLOAD THE DAUGHTERBOARD DOCUMENT • Download and read the appropriate build document for the daughterboard as well as this one BEFORE you start. • DO NOT solder the supplied Current Limiting Resistor (CLR) to the main circuit board even if there is a place for it.
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Schematic + BOM 10p* (empty) Jumper** 1N4148 (22K) 1N4148 (22K) (22p) D5-6 3MM LED*** (470K) 10u elec LM741 1u elec (4u7) GAIN 500KC ‡ 50KA (100KA) BOM shows Distortion+. Values in blue should be substituted for OD250. *Lots of conflicting info on schematics out there for this value. A lot of them show 1n, but that’ll suck a lot of top end.
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The power and signal pads on the PCB conform to the FuzzDog Direct Connection format, so can be paired with the appropriate daughterboard for quick and easy offboard wiring. Be very careful when soldering the diodes. They’re very sensitive to heat. You should use some kind of heat sink (crocodile clip or reverse action tweezers) on each leg as you solder them.
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Test the board! Check the relevant daughterboard document for more info before you undertake this stage. UNDER NO CIRCUMSTANCES will troubleshooting help be offered if you have skipped this stage. No exceptions. Once you’ve finished the circuit it makes sense to test is before starting on the switch and LED wiring.
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Wire it up - with battery (if using a daughterboard please refer to the relevant document) BOARD BOARD INPUT BOARD BOARD BOARD BOARD BOARD BOARD BATTERY This circuit is standard, Negative GND. Your power supply should be Tip Negative / Sleeve Positive. That’s the same as your standard pedals (Boss etc), and you can safely daisy-chain your supply to this pedal.
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Drilling template Hammond 1590B Recommended drill sizes: 60 x 111 x 31mm Pots Jacks 10mm Footswitch 12mm It’s a good idea to drill DC Socket 12mm the holes for the board- mounted parts 1mm bigger to give yourself some wiggle room, unless you’re a drill ninja 3 mm This template is a rough guide only.
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3 mm This template is a rough guide only. You should ensure correct marking of your enclosure before drilling. You use this template at your own risk. Pedal Parts Ltd can accept no responsibility for incorrect drilling of enclosures. FuzzDog.co.uk...
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