My temp sensor is before the ball valve, but outside the kettle. Since there is no flow during boiling (since I have the pump shut off), the temp cools down outside the kettle. I think my only options would be to put a temp sensor in the kettle or to keep the pump on.
I put some insulation over the ball valve. It helped, but still wasn't accurate enough when the pump wasn't going. Finally moved to the kettle itself.
I do have a false bottom that I could put a temp probe under. Then it would be out of the way of the grain bag.
RasPi ar a 3.3V device, never ever connect nothing with 12V to it. If the SSR are triggered by 12V you need transistors on optocuplers in between
This would be 12vdc at the terragady outputs. I can't directly measure the pi gpio pins without disassembling my controller. Everything else is working as anticipated although I do get some interesting voltages between .5-1.5vdc when the gpio is supposedly switched off.
The pi is not a 3.3v device, it's 5v. The terragady board has a step down circuit that takes the input 12v and provides the pi the voltage it needs.
5v to the 1 wire bus and rpi, 12v to the rest. Voltage is labeled on the PCB. Many people have fried their rpi because they didn't adjust the voltage from the power buck before they plugged in the rpi
Yeah I'm pretty sure they are, I'll attach a picture below. I think one of my components fail. We noticed that the circuit was switched on when it wasn't supposed to be at the end of our second batch, but thought it was a programmer error on our side. Then when we started our third batch and the rims would no longer toggle on or off, we realized there was a problem. The weird part is the fact that gpio22 shows the failure when checking continuity at the pins. But both 22 and 05 are showing 12v on the expansion board. So idk if there's a component between those two circuits that might have failed and allloea them both to switch on.
You have 12V directly connected to 5V in this circuit. If you are trying to make a pull down circuit, moving the resistor the base, disconnect the 5v,place the output between the base and the moved resistor. I not sure about the need for the diode, but at least turn it around.Each pin have this circuit:
You can measure voltage on the base of BC337 against ground, it should swing from 0 when gpio off to 0,7 when on. if order to see voltage swing in the output you need a load connected, a 1K resistor will do. May be the transistor is broken. The diode is there to prevent hi voltages when switching coil relays, it can be removed for ssr. watch out also for solder bridges .
Yes , I pick that image from the thread. The line between 5V and the diode should be erased.
Cheers mate. Going through the source, it seems that it's quite modular, and I can just define my "actors" and "thermometers". Gorgeous. Well, I'll go for it indeed! Thanks!
Wow I was was off when I wrote this. Like you later mentioned, simply disconnect the 5V from the 12V. Also make sure your motor/relay etc is connected through the 12V to the BC337. If you are not seeing it turn on you can lower the base resistance (R1) to increase the current draw.
The SSR works fine engaging the element and shutting off. The indicator light on the SSR appears to be operating normally with the state indicated on the Pi.
