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Table of Contents
Related Manuals for Lithium Grim ColoredThro
Summary of Contents for Lithium Grim ColoredThro
- Page 1 ColoredThro Building instructions v1.0...
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Page 2: Table Of Contents
ColoredThro v1.0 Table of contents PCB layout ............................... 3 Components ............................4 Power section ............................5 Modifications ............................6 Gain mod ............................. 6 Transistors ............................6 Mix and match ............................. 6 Feedback capacitor ..........................6 Additional clipping options ........................6 Build sequence ............................ -
Page 3: Pcb Layout
ColoredThro v1.0 PCB layout Dimensions: 50 mm x 50 mm 1.97 inch x 1.97 inch Manufacturers and product names are mentioned solely for circuit identification, and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement... -
Page 4: Components
ColoredThro v1.0 Components This PCB gives you the option to build a clone of either a Colorsound Powerboost, Colorsound Overdrive or Throbak Overdrive Boost. Parts differ per type as described in the table below. Decide which one you want to build and choose the appropriate parts. You should also take a good look at the mods section for other options and required parts. -
Page 5: Power Section
Which IC should I choose? ICL7660S or LT1054? In this application it does not really matter. The LT1054 can give more current @18V (100mA) than the ICL7660S (45mA @18V) but the ColoredThro does not draw that much current in any configuration. On the other hand the ICL7660S is much cheaper than the LT1054, so that could be a good reason to use it. -
Page 6: Modifications
ColoredThro v1.0 Modifications Gain mod The standard 10K gain pot (P2) has all the action crammed up at the end of the sweep. To make it more versatile you could use a C5k of C1k pot instead. Transistors Q1,Q2 and Q4 can be any silicon transistor you can think of. 2N2222A, 2N508, 2N3904 etc, etc. Note that I modified the PCB so it can both fit standard modern transistors (CBE) and eg. -
Page 7: Build Sequence
ColoredThro v1.0 Build sequence Soldering this board can be very complicated for some people since the solder pads are very close together. Use a magnifying glass to make the job easier. The trick to soldering a PCB is to work from small to big components. -
Page 8: Off Board Wiring
ColoredThro v1.0 Off board wiring Potentiometers In the pictures below you see the correct pin numbering of the pots (Alpha 16mm style). Solder the wires accordingly and it is always a good idea to twist the wires together to create a sort of extra shielding against external noise. -
Page 9: Footswitches And Stargrounding
ColoredThro v1.0 Footswitches and stargrounding R led2 R led1 Pregain Sleeve Ring Effect On/Off Sleeve Note that R led1 and R led2 are 4k7 resistors. You can change this value depending on the type of LED you use but 4k7 is safe enough for almost all LEDs for both 9V as 18V. -
Page 10: Alternate Pre-Gain Switching
ColoredThro v1.0 Alternative Pre-gain switching By design the Pre-gain pot (P1) remains in the circuit even when pre-gain is switched off. This may cause some unwanted behavior of the pre gain pot. When you turn it all the way down it will cut off all sound as it will ground the signal. -
Page 11: Biasing
ColoredThro v1.0 Biasing The transistors Q1, Q2 and Q4 need to be biased. The best way to do this is by using the biaspots VR1-VR3. The Colorsounds did not come with bias pots, but had fixed resistors. These values are mentioned in the table below. -
Page 12: Troubleshooting
ColoredThro v1.0 Troubleshooting All PCB’s have been 100% factory e-tested and out of every batch I receive I build an effect to double check, so there should not be a connection problem on the PCB itself. The board is not working (at all), what now? ... -
Page 13: Schematic
ColoredThro v1.0 Schematic Manufacturers and product names are mentioned solely for circuit identification, and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement...