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Vc vai ter mais respostas si consultare en english. ;-) Ja olho o BrewPiLess, e opensource e tein tudo o que Vc falo. Si tivese muitos tanques CraftbeerPi o Fermentrack son bon.

Yes, you can. But then take a look at CraftBierPi. Do not reinvent the weel

ESP pins can’t drive the relay directly, need aprox 70mA. The board relay breakout has a transistor doing the driver.

If the flow is not even the the flowmeter may lie. Yo can not calibrate for diferen flows.

1.265g - the co2 inside the fermenter. You know the exact weight cos you know the OD.

After some chemistry calculations, for every 40g of alcohol 44g of co2 are produced. Some of it remains in the liquid and in head space. But the co2 that goes out in the bubbles leave the system, the weight goes down.

4k7 is “usual” on 5v vcc. On 3v you are better off with 3k3. Lower pullup get better noise inmunity. I go as low as 820 ohms on long lines.

Nice to find this thread. I has been experimentig with hx711 and load cells to weight the fermenter. I want to find the delta as co2 exit to calculate the amount of alcohol and then the Plato. As you mention time drift make it almost impossible.

I need to re up my inverted V for 40m. In the seaside house only have home build 40m QRP. I do cw on and off over the years, but always on vertical key. That paddels look hard to master.

That’s funny. We here need to spend a year in each category and prove at least 80 contacts for each exam.

Congratulations Lee, 73 & DX when you get HF. Lalo CX7AAB

To be sure they are original you need to buy at a authorized reseler. Go to Mouser. They do not sell waterproof ones, only the to96 sensor. You need to solder the wire and waterproof them yourself.

Instead of a Keg try to carbonat in a PET bottle. That will minimize oxidation.

That errors ar in the system update, not in CBPi You are using buster, for CBPi I steak to Stretch

No, if CBPi3 is running fine, apt upgrade will not breake it. Do not do dist-upgrade, that may get the new python3 and then CBP3 will not work

That diagram is wrong. The colector of the opto is Not conected. And the relay coil is only connected to heather pin3

I will be wonderfull if you can presurize the device before closing it. Lets say 10 psi. So not that big pressure difference.

Without an impedance meter you have to try. Take a look on this: https://forum.planefinder.net/threads/tweaking-of-groundplane-spider-antenna.369/ Do you have any info about your radio input impedance? A good thing about do it with wire is that you can twist them back and for to get the optimum...

That’s no true. The energy the anntena put into the transmision line goes with the same rules. If part of the wave is reflected, this is energy that do not reach the reciver input. Try to connect a tv antenna with the wrong impedance cable and you will see.

As you say, SCR only conduct half cicle. They are used to rectify. You may use 2 SCR back to back.