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    1000W Pump + Shelly Relay - will it be safe?

    I expect this unit would cost quite a few dollars. A couple of aspects in the instructions I'd be concerned with. Appears to be a four pole device which is fine, only need to switch the active of the motor so just one pole required. If it was a standard run-of-the-mill contactor that was down a...
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    Heated jacket temperature regulator

    You could try them as they are cheap enough. One couldn't start to build one for that amount. Just might need to add a heatsink on the output element (mosfet)if it starts to get warm. First one says it's 10A so take that with a grain of salt.......in the same spec it says 30w.
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    PWM hall effect throttle problem

    You'll more than likely have to feed the signal through a rail to rail op amp amplifier.
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    1000W Pump + Shelly Relay - will it be safe?

    Supply a link to the relay so we can see the specs. This appears to have some internal overload.
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    Confusion, Deliberate hacking, Guesses, Tests

    GAWD!!!...don't tell him that .....next he'll be on about free energy and motor generators.....:eek::eek:
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    Capacitor?

    Did you read the part that said motors can draw up to six times full load current...??? Fine testing on mains supply where one has capacity to start and run this thing from now to eternity. Because of this unlimited capacity, the motor starts and reduces from the maximum requirement in the blink...
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    Sharp RT-3388a solenoid/plunger not working

    Hehehehe....op stuck it in upside down....AGAIN.... upstream without a paddle this one.:rolleyes:
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    What is something electrical engineers know that others don't?

    Common sense in my experience.
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    Capacitor?

    Yes, you pretty much answered your own question in your first post. Other than that a tong tester, commonly known otherwise as a current clamp meter. And a voltmeter usually simultaneously required. By your own words, "have to hold the contactor in" , pretty much covers what I said previously.
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    off topic problem with fancy smart kegger and gas, fluid cooling system.

    Nope, as usual, wrong again.
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    Power supply for wireless speaker

    Looks like a 4 pin mini din socket. There are adaptors available that will convert say, from a laptop plug in supply but you will need to find a supply which comes close to your 15v dc and load current requirements. As above, it would be a safe move to open the case and check what the...
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    Capacitor?

    If there is not enough capacity in the generator, you risk running the pump continually on the start winding and cooking the motor. That is if it ever gets going. Motors can take up to 6 times full load current at startup. If that capacity is not there, the voltage drops significantly and never...
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    Old module does not work

    Show a clear photo of your board problem
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    Sharp RT-3388a solenoid/plunger not working

    DOHHHH!!! ......:rolleyes:now it's upside down.......(Goto #12) Solenoid appears to get it's signal (whatever form that takes) from the control unit via either F1 or R1 (assume forward or reverse) There is a "zero rewind" switch sw10 which would, I imagine, disable/enable that feature. You...
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    Sharp RT-3388a solenoid/plunger not working

    Cannot make out any detail on the new photo as it is too small to make out any detail. Did you look at it when you posted it...???:rolleyes: Q802 is ....(from what I can make out on previous photo #1 )... driven by Q803 via a couple of (what looks like) either R1 or F1 inputs. Actually that is...
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    Sharp RT-3388a solenoid/plunger not working

    It's a wonder you managed to get any movement out of it with 9v. Supply rail appears to be 27v so is that ok...?? You say you shorted Q808 (which doen't appear to exist) but what about Q802, which, even though rather blurry, I think is the switch for the solenoid. I too, have had solenoids jam...
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    Samsung inverter board LED Fail

    DC not AC
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    off topic problem with fancy smart kegger and gas, fluid cooling system.

    If you have only two pipe stubs, the larger pipe size is normally the suction line. Discharge is then the line going to the condensor, then the filter dryer and finally the capiliary line up to the evaporator. If indeed capiliary controlled, for ATX control, similar. If only one suction line...
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    Controlling DC motor speed and direction with RF remote

    An off-the-shelf 2.4g rc control perhaps. Relatively cheap, mostly reliable and usually good range. Depends on the selected model/type as to the programmable features but most have quite a range of options. All mostly dependant on what the environment for operation is.
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    Sharp RT-3388a solenoid/plunger not working

    I don't see any Q808. Looks like Q802 would be the switch for the solenoid.
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