Best way to get a couple of analog values into HAL?

I want to add a couple of physical pots to control Jog and feed speeds.

I'm using a 7i96s, and I don't believe that particular card has analog input capability.

I'm sure there are many ways to accomplish this. On my mill I used Arduino Connector and it works well, so that's an option, however fair bit of carry on for just a couple of analog inputs.

Thinking out loud... I could read the pot values with a dime store 8 pin uC and do a voltage to frequency conversion, and then apply those variable frequency signals to two digital inputs on the 7i96s if there an easy way (in HAL) to then measure that frequency and apply the result to:

halui.axis.jog-speed

and

halui.feed-override.scale

Or, perhaps there are other better ways, any suggestions?

 

slowpoke wrote:

Thinking out loud... I could read the pot values with a dime store 8 pin uC and do a voltage to frequency conversion,....
 

LM331 Is cheap and easy to find, amazingly i can find it here, although i can not find M3 screws!
www.ti.com/lit/ds/symlink/lm331.pdf?ts=1...Fwww.google.com%252F

M3 screws follow the socks.

On a serious note I'm going to delve into the abyss that is BSPI, and see if I can do something to read a SPI ADC. Hopefully something that one can get readily from Aliexpress. Though that kind of shenanigans with require at least 4 pins.

there is always the THCAD2. You might be able to use a MUX2 to swap the inputs