dot matrix madness
Active member
Following problem: The EDQ Afterneath pedal accepts 0-5V as input for its expression jack, but CV signals from
Eurorack equipment are typically in the range of -10V to +10V. According to an email I got from EDQ "The input
is not intended to handle negative voltages or voltages exceeding 5V".
Thus I'm looking for a way to clamp the CV between 0 and +5V.
The wiring of the expression input jack is Tip = wiper, Ring = 5V, Sleeve = ground.
This would allow to use two Schottky diodes to clamp the signal between its internal+5V and ground, but in my LTSpice simulations
I see a voltage range between -0.3V and +5.3V (1k resistor before the diodes, 100k as load)
In another approach I used a 4.7V zener diode to ground followed by a Schottky diode to ground, and here
I obtain a voltage range between -0.3V and +4.6V again with a 1k resistor before the diodes.
What's the proper solution?
Eurorack equipment are typically in the range of -10V to +10V. According to an email I got from EDQ "The input
is not intended to handle negative voltages or voltages exceeding 5V".
Thus I'm looking for a way to clamp the CV between 0 and +5V.
The wiring of the expression input jack is Tip = wiper, Ring = 5V, Sleeve = ground.
This would allow to use two Schottky diodes to clamp the signal between its internal+5V and ground, but in my LTSpice simulations
I see a voltage range between -0.3V and +5.3V (1k resistor before the diodes, 100k as load)
In another approach I used a 4.7V zener diode to ground followed by a Schottky diode to ground, and here
I obtain a voltage range between -0.3V and +4.6V again with a 1k resistor before the diodes.
What's the proper solution?
