I got a ST L294 solenoid driver and I am stuck on the enable input (TTL) currently using a sunx cx-24 @ 5v supply. The output is NPN. I've hooked everything up except the photo sensor (cx-24) and powered up using 20 v. When I hooked up the cx-24 I blew the L294.
I believe it is the input( or rather the output of the cx-24 ).
I've seen suggestion of an optocoupler, or should I look at something else.
The L294 specs on enable are L -0.3 - 0.8 v -100 uA H 2.4 - ?? v 100 uA