treble toggle w/ led

All frequent questions on switching: true or not true bypass, transistor-based or mechanical.
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razorblades
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Post by razorblades »

Hey guys, another noob here. I'm building an lpb-1.I added a treble toggle with a dpdt on/on. Worked great. I tried to add an led for the treble side. It compressed the #@%& out of it (I now know why). I got some sub mini incandescent bulbs but they don't work. Do I need a different switch, a new approach or do I just have some broken bulbs? Help is greatly appreciated

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Cub
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Post by Cub »

Hey blades, welcome to the forum.

Beavis Audio has a great page on switches, including a layout for a switch that you want.
http://www.beavisaudio.com/techpages/Switches/
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razorblades
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Post by razorblades »

I think I have it. 3pdt. Led goes 8 to 9. Then 8 to the clr on the board. Am I in the ball park? Thanks for the welcome and the link.

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Cub
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Post by Cub »

I'm not entirely sure. For the treble mod, you have to switch both caps, right ?
Then here's how I would do it, this is your 3PDT switch.

Code: Select all

|1|4|7|
|-|-|-|
|2|5|8|
|-|-|-|
|3|6|9|
1. stock cap 1
2. hole on the board for cap 1
3. treble cap 1
4. stock cap 2
5. hole on the board for cap 2
6. treble cap 2

Exactly like Beavis drew it.
Image


As for the LED

7.
8. ground
9. LED -

For uniformity, use the same value resistor on the LED + side that you use for the on/off indicator, then both LEDs will shine just as bright. Put the other end of the resistor through to the battery and you're done. :thumbsup
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razorblades
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Post by razorblades »

Great! I'll pick one up tomorrow. I've been using the wrong switch and approach. Can't thank you enough. :thumbsup

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Cub
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Post by Cub »

Glad I could help, good luck with your build ! :thumbsup
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razorblades
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Post by razorblades »

Toggle came in the mail earlier. I followed the guidelines and it works great. Thanks again :horsey:

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Cub
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Post by Cub »

Good to hear ! You've doubled the versatility of your pedal and the added LED is a nice and classy touch. :thumbsup
I wish I were a chestnut tree, nourished by the sun.
With twigs and leaves and branches and conkers by the ton.

razorblades
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Post by razorblades »

This project got left behind and forgotten about. After building it, there was a noticeable volume drop. Still learned a tool that could be interesting in a larger circuit.

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