jhn.nguyen
New Member
I'd like to control 24 single coil latching solenoid valves using just 12 digital outputs from my micro. The valves actuate at +/- 5V and 110 mA. I have a power supply of 5V up to 200 mA. I have tried setting up an 3x8 array with each line using 1/4 74HCT125, but it could not provide enough current. I plan to go to my last resort of using a single DPDT to change polarity of the supply voltage, and then for each valve in series with a SPST relay which would connect it to the circuit, with all valves in parallel as I only need to actuate one valve at a time.
This results in 25 relays, and certainly not ideal for space. I could not find another solution that would give a smaller footprint, and lesser costs. Any help is appreciated, thanks.
This results in 25 relays, and certainly not ideal for space. I could not find another solution that would give a smaller footprint, and lesser costs. Any help is appreciated, thanks.