I am looking to make a drive circuit for a Liquid crystal plate with the ability to adjust the drive AC voltage/ / amplitude.
The hard part is that I have to have a stable +/-5V max signal with no bias to either side and a strong drive ballast of at least 3 times the peak current. Was looking at a RS232 MAX type Transever but I don't know which one to choose, I also saw people suggesting op amps, or an H bridge which could work too. I only need minimum 80Hz of square wave. I just don't know which avenue to try for a pure Square wave that I could switch on an off from say one pin and perhaps control amplitude from another. Let me know what you would suggest.