Rev G Prop-1 more sensitive on outputs?

[gadget-evilusions]

Does the new surface mount output chip need additional protection from fly back voltages on solenoids, vs the DIP version? I had two Prop-1's stop functioning after operating a pair of relays, but after switching to an older DIP Prop-1, had no issues. Do I need to add flyback diodes to anything with the new revision?

[bsnut]

I don't think it would hart. The ULN datasheet shows Output clamp diodes. It would just provide extra protection for what you trying to do.

[JonnyMac]

As William points out, it's the same chip, just a different package. JB is on a personal trip this week; when he's available I will consult with him.