The circuit would run on a battery or DC wall wart. The IC on the left is an oscillator the generates an AC signal.Kaze105 said:I have 3 questions regarding that circuit. (sorry if they are or sound dumb, fairly new to this.)
I see that you said it is driven with AC, but the circuit itself will not use AC voltage?
I would guess that any SS wire would be OK.Also for the sensor, is any stainless steel electrode wire alright? I would like to confirm this as the circuit says probes.
Yes, and with the relay's common contact to ground and a pull-up resistor on the uC's input, or the relay's common contact to +5v and a pull-down resistor on the uC's input. I'm not sure, but you might be able to run the whole circuit of off 5V rather than 12V. Then you could replace the relay with a resistor and drive the uC input directly.My final question is regarding the relay. I would like the signal to go to my microcontroller, so should I just connect the normally open side to the microcontroller.
Kaze105 said:Yes. the signal from the sensor will go to the microcontroller, which controls a solenoid valve, allowing water to flow from the tank to the bowl.
I'm assuming that you want the sensor to output a signal that will be a digital input to onr of th uC's I/O pins. This could be a switch closure and resistor, as with the relay contacts. Or, it could be a 0v-5V signal from the sensor's output transistor.When you say uC's input, may I ask what you mean. As for the voltage, I will try both voltage to see if it works.
KMoffett said:Kaze105 said:Yes. the signal from the sensor will go to the microcontroller, which controls a solenoid valve, allowing water to flow from the tank to the bowl.
So you would need a two-level sensor...Fill...and...Full
I'm assuming that you want the sensor to output a signal that will be a digital input to one of the uC's I/O pins. This could be a switch closure and resistor, as with the relay contacts. Or, it could be a 0v-5V signal from sensor.When you say uC's input, may I ask what you mean. As for the voltage, I will try both voltage to see if it works.
This is a link to a 2-level ucontroller circuit that i made to automatically fill a Christmas tree stand. https://www.picaxeforum.co.uk/showpost.php?p=121399&postcount=11
Ken
Yes. If the bowl were metal, the common (longest) electrode could be the bowl itself.Kaze105 said:I would like to confirm a few things about your circuit. When I position the electrode wires, I position them where the water level should be increased, when the solenoid valve should closed due to full bowl, and the last one at the bottom of the bowl.
Checking the picaxeq8m, I see that it can be programmed a couple different way including flowchart and basic. Is either one better than the other?
Last question is about the SSR. What kind of SSR would be best. For example
https://www.newark.com/jsp/search/browse.jsp?N=1002182
The relay will be connected to a solenoid valve that will operate at 12V DC.
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