logic controlled CV out question

[kvb]

I am working on a logic driven circuit that will be using 4044 (switches with I/O) to select various control voltages. The input (I) will be the 5V, then out to the potentiometers.

I'm thinking about putting a current limiting source in between the 5V regulator and the switches. This would be a good idea if I ever send the signal out to a 3080.
But I could just put the limiter on the circuit with the 3080, so this wouldn't be entirely necessary.

However, in the interest of trying do things right, I was alternately considering putting in a simple current source to isolate the signal at the switches from the logic's power supply.

I had all of this working on breadboards with the signal coming right off the regulator and did not notice any problem with false triggering etc. I've since disconnected the 4044 breadboard part, so now as I build it for real I'm ready to do what should be done. Plus, there's just enough room on the board for a limiting source.

Q: Would I need either of these sources to call this proper?



As far as why I want to use the switches instead of just coming off of the logic outs into the LED/potentiometer set-up – The LEDs will be at the same brightness no matter how low the setting is; Plus – and more importantly – the switches will allow me to connect different types of signals or different and changing voltages as a CV.

[bioroids]

I don't know, for me, the "proper" way is the way that makes the stuff work.
I would not introduce any extra circuit that is not needed, unless I know for sure I'll be needing it in a short time.

Hope it helps!

Miguel

[kvb]

OK, I see your point.

After thinking about it a bit more, I figure if I'm going to do anything fancy with the voltage it will probably end up on a different board anyway.
peace