Whilst I was waiting for some more bits to arrive for me to continue with the second probe and the water flow sensor I put together a control box for the pump that will feed the butts from the sump, it's a Solid State Relay in a box. The SSR says it will switch on with 3V DC applied but I could not get it to work below 5V when using a fan heater as a load.
Am I a bit thick? In your drawing in manual mode you sort out the 1MOhm resistor to action the relay, but how are you getting the voltage across the resistor. The switch is shorting out any power?
I'm assuming you have either a Pi or external supply as the 'input' power source and then you disconnect from the Pi in manual?
Looking at the picture and zooming in to the relay 'input' it requires a voltage of 3V to 32V.
Manual mode you need to 'supply' the 3-32v not just short the connections.
Why do you think that the switch is shorting out the voltage? As Penri says, it's a double pole switch, so the two poles move together. Penri has not shown the usual dashed line joining the two poles.
I had assumed that the voltage was applied permanently to the manual contacts and under Pi control for the auto position.
I have to apologies for the limitations of my circuit drawing S/W it didn't have the symbol for a ganged switch, leave alone a Triple Throw switch, and try as I might I could not add additional info. outside the text boxes. Terry, your interpretation is bang on.
I'm glad I didn't try to draw the Quad Pole Triple Throw switch which I actually used, that would have thrown a whole flock on pigeons into the fan:)
Did you label the switch the wrong way around? I was getting a bit confused when testing, but it worked if I set it to manual for the Pi wires, and auto for the manual wires XD
hamishmb wrote:Excellent. The software seems to be on track to be ready soonish, as well
Don't rush too much; I have to finish testing and refining the DC-DC Converter software and build the new Interfacing board before we can use it in anger.
