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Table of Contents
Related Manuals for Lithium Grim PhotoFet
Summary of Contents for Lithium Grim PhotoFet
- Page 1 PhotoFet True Bypass Relay Building Instructions v1.0.1...
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Page 2: Table Of Contents
PhotoFet True Bypass Relay v1.0.1 Table of contents PCB layout ............................... 3 Top-side ............................... 3 Bottom-side ............................3 Components ............................4 The technique behind the switch ......................4 Build sequence ............................5 Connecting the switch ......................... 7 Optional SW2 ............................7 Lining up the LED .......................... -
Page 3: Pcb Layout
PhotoFet True Bypass Relay v1.0.1 PCB layout Top-side Bottom-side Dimensions: 24,6 mm x 34,7 mm 0.97 inch x 1.37 inch... -
Page 4: Components
PhotoFet True Bypass Relay v1.0.1 Components All parts must be rated 25V+ if used in conjunction with a charge pump Name Value Comment 100u Electrolytic 100n MKT, Wima or SMF 100n Ceramic 1n5817 1N4148 Color and type of personal choice... -
Page 5: Build Sequence
PhotoFet True Bypass Relay v1.0.1 Build sequence Soldering this board can be complicated for some people since the solder pads are very close together and components must be placed on both sides of the board. Use a magnifying glass to make the job easier. - Page 6 PhotoFet True Bypass Relay v1.0.1 Now, start by soldering the resistors and D1 and D2 on the top-side. You can experiment with the value of R1. If the LED is to dim, lower the value up to 1k5 to make it brighter, but do remember that the brighter you set the LED, the shorter it’s lifespan and the more power it consumes.
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Page 7: Connecting The Switch
PhotoFet True Bypass Relay v1.0.1 Connecting the switch Now you’ve come to a point to make some more decisions. This build is designed to save as much space as possible. To do this you could stick the momentary switch to the bottom of the PCB. If you do not want to do this then you can skip this part and connect the switch in another way as you desire. -
Page 8: Lining Up The Led
PhotoFet True Bypass Relay v1.0.1 Lining up the LED We are almost ready. Now it is time to decide how to connect the LED (D3) and where to drill a hole in your enclosure. I used and old enclosure I had lying around (BYOC, how fitting) so it does not really represent how tight you can build this! I will describe the procedure of fitting the led directly on the PCB, but you can always decide to do it differently eg. - Page 9 PhotoFet True Bypass Relay v1.0.1 6. Press down on the led making sure not to damage it, but still hard enough to leave a mark in the tape. Remove the LED and mark that dent with a sharpie. 7. Now drill the hole. Be extra careful as you will be drilling from the inside out instead of the other way around.
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Page 10: The Finished Switch
Residual noise (LED popping) Although the photofet prevents the effect from loud popping, there can still be some light pop due to the LED turning on and off. One idea is to extend the time that the effect is turned off, but that could lead to a feeling that the switch is acting sluggish. -
Page 11: Off Board Wiring
PhotoFet True Bypass Relay v1.0.1 Off board wiring To Effect Ground To Effect IN Ring Sleeve Sleeve To Effect OUT As you might have noticed in the diagram: Green means input and Blue means output. Note: This board works on either +9V or +18V input. Do not use any adapter rated over 18V! -
Page 12: Modes: Using The Switch
PhotoFet True Bypass Relay v1.0.1 Modes: Using the switch The switch can work either as a (default) latching ON-OFF switch (like all ordinary effects switches) or as a momentary switch (either “make” or “break” depending on your order). When you keep the switch pressed for 2 seconds or longer, it will temporarily switch to momentary mode. -
Page 13: Schematic
PhotoFet True Bypass Relay v1.0.1 Schematic...