Hey.
I found this bass wah schematic online ( http://members.shaw.ca/roma/wah-1b.gif ), but it has a switch that is supposed to simulate the actual pedal for activating the effect.
I was wondering if I can modify the schematic so it works in auto mode (no external trigger is needed). As I don't know much about this circuit, the best I can think of is feeding the input signal to the point where the foot switch is. That or using a 555 IC in astable mode. This of course might be utterly wrong.
Any suggestions appreciated!
Quote from: imperatormk on May 24, 2014, 12:51:34 PM
I was wondering if I can modify the schematic so it works in auto mode (no external trigger is needed).
Do you mean like an auto-wah? Or like an LFO-modulated filter? Since the business end is being controlled by an LDR, I guess a whole pile of options could sit at the right-hand side of that schematic.
Welcome along, btw. :)
Hey.
QuoteDo you mean like an auto-wah? Or like an LFO-modulated filter?
What is the difference between the two? Which of them is simpler to construct?
Thanks!
The auto-wah kind opens (or closes) a filter according to your playing: strum or pick harder, the more the filter opens. The LFO-modulated filter will just go open-close periodically. Neither is "easier". You could have, ahem, "fun" - whichever you choose. :icon_biggrin:
Have a go with the (http://www.diystompboxes.com/smfforum/Themes/diytheme/images/english/search.gif) button. Try stuff like "LFO", "auto wah", "lightwah", "pulsinator", ...