How Can I add a Boost in to a design?

Travis

Travis

Active member
Hi! I wanna add a boost knob in a overdrive but It must work only if I turn up the knob

For example, If the knob is at "0" the overdrive sound as if I had nothing connected afterwards. And If I turn up the knob the overdrive sound get louder.

Similar to the snouse black box concept.

Some ideas or help?

Thanks guys
 
You could replace the boost knob by a blend circuit where the Boost is in the Send/Return, and replace the boost pot by a trimmer. This way you could get from dry to wherever you set the boost at max on the blend knob.
 
I think I didnt explain it properly.

I wanna add an extra pot to my pedal, this pot must be a boost. If it is at zero the pedal sound without the booster and If I turn it up the original pedal sound gets louder. It´s just add a extra pot after the circuit I think
 
IMO I would add a LPB-1 right after the main circuit and put a resistor between lug 1 and ground of the boost pot. You'll probably need to experiment with a breadboard or some stripboard to find the value that would work. Off the top of my head maybe 1k. It would meet your criteria here and won't take up much more real estate in the enclosure.
 
You can put a resistor or a trimmer between the pot and GND. With a trimmer you can always adjsut your initial signal level.
 
Travis said:
I think I didnt explain it properly.

I wanna add an extra pot to my pedal, this pot must be a boost. If it is at zero the pedal sound without the booster and If I turn it up the original pedal sound gets louder. It´s just add a extra pot after the circuit I think
Click to expand...
Adding a pot does not provide boost. You need a boost circuit. Reading the Snouse information, there is a pre-gain boost circuit that is selected ON/OFF with an internal dip switch and then controlled with the boost knob.
 
Dan M said:
Adding a pot does not provide boost. You need a boost circuit. Reading the Snouse information, there is a pre-gain boost circuit that is selected ON/OFF with an internal dip switch and then controlled with the boost knob.
Click to expand...
Yes, I know I must add a boost circuit. I will try with breadboard!!
 
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If you're using a simple boost circuit like this LBP-1, you'll need to replace the connection from lug 1 of the 'boost' knob to ground with either a trim pot or a resistor; otherwise, when you have the boost fully CCW you'll have no output. A trim pot would be easier to tune.
 
My first comment was to tack on a LPB-1 with an addition resistor to ground out of lug 1. I actually put this on a breadboard (very simple) and found that I pretty much had unity gain when I had a 10k resistor put in there and the BOOST knob dialed all the way down.
 
Travis said:
Hi! I wanna add a boost knob in a overdrive but It must work only if I turn up the knob

For example, If the knob is at "0" the overdrive sound as if I had nothing connected afterwards. And If I turn up the knob the overdrive sound get louder.
Click to expand...
Can we see the schematic of your overdrive circuit?
 
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