hi all,
i have Rane TTM 57SL mixer (and i love it) and some cheap sustain pedal - Proel GF29.
the problem is that effects triggering on TTM57SL is latch-type = one step (down and up) on foot pedal turns the effect ON, another step (down and up again) turns the effect OFF.
i want to use it in non-latch way - effect is ON only when i pushing the pedal down.
so i need some simple circuit that i can build into the pedal box, something that will create short impulse (0.1 sec?) on step down, and another impulse on step up (release). that impulse should switch the external circuit (that goes to mixer) via some electronic relay (optoswitch?).
i'm into microcontrollers, but i don't want to use them here. i want some simple and reliable circuit that will run on one AAA battery (or some higher voltage lithium, if needed) for many years without problems (of course with some master power switch).
thank you for your suggestions!
i have Rane TTM 57SL mixer (and i love it) and some cheap sustain pedal - Proel GF29.
the problem is that effects triggering on TTM57SL is latch-type = one step (down and up) on foot pedal turns the effect ON, another step (down and up again) turns the effect OFF.
i want to use it in non-latch way - effect is ON only when i pushing the pedal down.
so i need some simple circuit that i can build into the pedal box, something that will create short impulse (0.1 sec?) on step down, and another impulse on step up (release). that impulse should switch the external circuit (that goes to mixer) via some electronic relay (optoswitch?).
i'm into microcontrollers, but i don't want to use them here. i want some simple and reliable circuit that will run on one AAA battery (or some higher voltage lithium, if needed) for many years without problems (of course with some master power switch).
thank you for your suggestions!
I haven't dealt with Rane in a long time, but in the past, they were usually available with schematics. Often the schematic was included with the manual. So you might contact them directly and ask if making the pedal latch momentary is a capability already inside the unit. In other words, there may be a jumper to add or remove that would do the change. Never hurts to ask.
The user manual states this works with several types of footswitch, and a lot of the function appears to be software related, so I could imagine there are options stored within the system for momentary.
meanwhile, your circuit as suggested could be made. I would envision a pulse output created by a 555 or something similar. Then a change of state detector circuit would trigger the timer IC. My design ideas are from the era of TTL and CMOS, I am sure there are people on this forum with more up to date basis. A PIC or Arduino might be a good way to go.
The user manual states this works with several types of footswitch, and a lot of the function appears to be software related, so I could imagine there are options stored within the system for momentary.
meanwhile, your circuit as suggested could be made. I would envision a pulse output created by a 555 or something similar. Then a change of state detector circuit would trigger the timer IC. My design ideas are from the era of TTL and CMOS, I am sure there are people on this forum with more up to date basis. A PIC or Arduino might be a good way to go.
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