WIGGLING 'LITE' IN GUEST MODE

[s'mores]

I'm trying to make a little box to translate bipolar Eurorack control voltages to a VGA signal. Each of the color channels is supposed to receive 0.7v signals. I was thinking of using simple opamp circuits to scale signals, but it occurred to me that I could passively mix signals using potentiometers set up as resistor dividers. Was going to use the standard reverse biased diode to ground to protect against negative voltages. I'm wondering if I should also include some sort of overvoltage protection. Would a forward biased 1N4148 diode to ground work? Any signals above .7v should be enough to exceed the forward voltage of the diode, while anything less won't be able to pass.

[FetidEye]

for active :
check the LZX Cadet C5 Scaler circuit:
https://www.lzxindustries.net/products/cadet-v-scaler/

These scale -5+5 bipolar to 0+1v, or 0+5 unipolar to 0+1v (see alt. schematic)

I've made some pcb's from these schematics , this works good!

passive :
Sounds good. try it on breadboard to be certain!