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It's a great chip for the price. I use them to switch SSRs, electric ball valves (CR02), solenoids and contactors. It has internal flyback diodes so I've had no issues at all with voltage spikes when switching inductive load. When used with inductive load make sure COM pin is tied to + voltage...

This board will also work. 500ma pr channel, 8 channels. Saves you a few bucks Mosfets are overkill to switch low current

I agree negative integration is not needed for general brewing. As long as we don't use output offset (e.g P output 50% when error is 0) will a negative integrator contribution to the output give any benefit in any case?

This looks good seems like you're on track to get it going with BC. I peaked a bit more on the trends you posted earlier e.g this one, I notice that when you increase the setpoint there is a lag before the output starts to increase. The same lag is not there when decreasing setpoint and the...

To me it looks like its behaving normal. The high Kp makes the rapid changes its almost an on/off controller. My example is with error=-0.5 and +1.5 and Kp=0.5, Ki=0.05, Kd=0. I use 2s calc time I guess thats why the initial Kp addition is not a vertical line on the trend. I wouldn't put any...

Hmm are you sure the integral minimum is clamped to zero? If I set up a PID with a small gain and medium Ki it integrates nice to 100% on a small error. When I give it a small negative error it moves nice down to zero and back up again if I give it a positive error again. But, if I give it a...

Just a tip, two 4.7k in parallel will equal 2.35kohm if you want to test before the 2.2k resistors arrive.

The Sestos is a weird PID. Here is an article from a guy trying to understand its algorithm. Its in Norwegian but google will translate it pretty good. Back to the BC PID. I am pretty sure it uses the Arduino PID library or similar to do the calculations. How it calculates the output is...

You might want to try Ziegler-Nichols method to do the tuning i.g. as explained in this youtube video. The result will get you close to good tuning values, if its a bit aggressive you can use the alternative formulas from the wikipedia site. It's crucial for a good result that the input sensor...

I believe you can also emulate the value as a onewire DS18B20 in the weight cell mega and recieve the value in BC as a onewire input. Checkout onewirehub library.

I use this nozzle. Works ok, I have 3.5 bar water pressure and I am boiling 50 liter with a 4500W element at 60% duty.

Same here, no good experience with boost dc converters but the reducing dc converters has been working great.

IMO its better to have a good 24v source and use small dc-dc converters wherever needed. Like this one. You can find them up to 30A but then a lot bulkier.

Yes you need a Feather and some breadboard wires (male-female?) to wire it up to the board. I am sure you won't regret going from Cbpi to BC!

As far as I know the interface board can be wired to any BC supported arduino interface. Offcourse the connectors don't match so you have to wire individual wires from the pins on the arduino interface to the correct pins on the CBPI interface board. Also the onboard 5V power supply is powerful...

I do something similar. I have wired the temp sensor to a Feather and the SSR to a Wemos D1 mini. On the Feather I have set up the PID interface and assigned the output from it to a unused not wired pin on the Feather. (Since you can only assign the temp sensor to a PID element on the same...

Hello all, I am finally done with the automation of mashing and sparging of my 3 kettle RIMS setup. If someone wants to use my script for ideas your welcome. I wrote it as ongoing loops so I always have the chance to pause things in case of stuck mash or anything else. For now it has only one...

Yes correct, the pressure sensor has to be connected to the analog pin.

Using the analog pin is easier since Wemos D1 mini already has a onboard voltage divider to accept 3.3V to the A0 pin and reduce it to 0-1V to ADC. So to make A0 accept 0-5V you only have to add a 180K resistor between the sensor and A0 to make R1=180K + 220K=400K. R2 is onboard and is 100K. See...

Yes its 1-wire similar to this this probe. It can be wired as the Mega with 5V to power the probe but 3.3V will also be sufficient. Its important that the 4.7k resistor is between 3.3V and the datawire/input pin, since the Wemos cant handle 5V on the input pin. Connect the datawire to pin D1 on...