However, I did notice several big resistors, each reading about 3. The size of the resistors seems to suggest that they are rated at 2W. You might wonder what the differences are between this valve with the Orbit valve.
Here are my two cents:. Pros: — 3. This simplifies the circuit design a lot. In fact, only two low-side drivers are needed to ground pin 2 or 3, which is much simper than h-bridge driver required by the valve. Below is a sketched schematic when using this valve to replace the valve.
As you can see, the circuit is much simpler than before. Tags: sprinkler solenoid. Posted in Sprinkler Projects. Thank you Ray! I kept on wanting to use this, but just never seemed to get around to take the time to work out the details. I have 4 of these I can use, since the controlling unit went belly up several years ago.
Thanks for sending me an e-mail with a heads up. Hi Ray First of all, my compliments for your blog. Something like how many PSI they can stands, if they need a minimum pressure to work, and so on?
Thanks STeve. I don't have the exact specifications for these valves, but I do have an Orbit 1-dial timer valve which says the maximum operating pressure is PSI. I think they use the same type of solenoid, so I guess they are all PSI max. Ray: why are you using 24v? The battery is 4. I'm trying to fix mine that just failed, maybe this is why…. Yes, I am pretty sure there is a 24v voltage booster inside the controller unit.
These valves cannot work with 4. By the way, if you've tried the control unit, you should notice that when you set the valve to open or close, it usually takes seconds to actuate the solenoid. This is because the voltage booster is building up charges. For an example voltage booster circuit, look at my first blog post the minty valve project. It is actually possible to use the Arduino directly for boosting voltage, thus saving a booster IC LT in this case.
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