OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › Modding OpenSprinkler DC Version for Latching Valves? › Reply To: Modding OpenSprinkler DC Version for Latching Valves?
Ray
1) You can submit a support ticket at:
support.opensprinkler.com
and arrange to purchase a Latch driver board. It’s a lot cheaper than buying a new controller and you can replace the driver yourself. This way you can reuse the same logic board and enclosure.
2) There is no easy way to modify the DC driver board for latching valves. Latching valves require an H-bridge to operate because you need to be able to reverse the polarity when opening vs. when closing, which the DC driver doesn’t have. At best, some latching valves have 3 wires in which case it can take 2 ports on DC controller to operate. Still, even that requires a firmware update, which is probably not worth your time.
3) We no longer sell latching expanders — the demand for latching controller is very small to begin with. It make no economic sense to carry latching expander any more. You can NOT use DC expander for latching valves, again, because the way they work is quite different.