Folks, what’s a good strategy if I want to match a small motor to a small Lithium battery?

The motor drives a blower. I need to control the speed of the motor within 10%. The entire instrument works one hour a day, and it needs to last for two years. It’s a consumerist product; no a high reliability requirements. The hardware is cost-sensitive.

The battery is a single 18650 Lithium cell, although it isn’t set is stone, and I can specify another battery, if needed. The battery will be recharged by the owner every day.

@TonyStewartSunnyskyguyEE75 So do you remember that welding question I asked you about the E7018 rods? And nobody seemed to know the answer. Well I figured it out by going to a welding shop and trying out my rods and theirs and measuring everything. It's the voltage. Voltage was the problem for why my rods weren't running.

@TonyStewartSunnyskyguyEE75 Just the voltage, nothing else. Current wasn't the problem, rod type wasn't an issue, rod length wasn't, transformer core saturation wasn't either. It was as simple as voltage.

Quick question, in this question - arduino.stackexchange.com/questions/39556/…

Does the person asking the question have SDO on the external ADC connected to MISO on the ATMega32u4? That's my guess but I haven't been able to verify this through the datasheet/googling around

Please @ me so that I get a notification, I don't normally come on here

@Tri Yes, that should be it. (But I only looked quickly at the ADC datasheet and I don't know Arduino at all)

It looks like the required CPHA and CPOL settings might not be the most common ones. And there's some mode set by whether MOSI/SDI is set or not when CS/CNV is asserted.

We've got a live one... electronics.stackexchange.com/questions/477271/…

@Peter For the moment, anyway.