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Rev

So then as a followup: Instead of running external power through the Arduino, and taking out from Vin and 5V, if I supply the 12V through Vin in parallel with the two VMOT pins. That way the current for the motor controllers isn't running through the arduino, but I can still use the onboard regulator to get the needed 5V supply for logic. I'm trying to avoid getting extra parts like a separated regulator/converter, since I have a limited budget.

Vera
– Vera

2024-10-14 20:34:17 +00:00
Commented Oct 14, 2024 at 20:34
@Vera using an arduino as a fuse is not the way to save money

jsotola
– jsotola

2024-10-15 16:23:46 +00:00
Commented Oct 15, 2024 at 16:23
@jsotola Can you explain what you mean by that? I found this answer to a similar question that indicates otherwise.

Vera
– Vera

2024-10-15 18:18:28 +00:00
Commented Oct 15, 2024 at 18:18
@Vera a fuse burns up when too much current flows through it ... an arduino behaves the same way

jsotola
– jsotola

2024-10-15 22:12:50 +00:00
Commented Oct 15, 2024 at 22:12
@Vera 12 volts at the barrel jack (or Vin) is OK for the standard Uno: store.arduino.cc/products/arduino-uno-rev3. Important only is that the connected peripherals do not draw too much current otherwise the regulator gets hot. If you tap the 12 volts from the barrel jack at Vin it goes through a diode (D1 here) : content.arduino.cc/assets/UNO-TH_Rev3e_sch.pdf . Your motors may stress this. A silicon diode has a nominal 0.7 volt drop so 2 amps would be 1.4 watts

6v6gt
– 6v6gt

2024-10-16 07:22:41 +00:00
Commented Oct 16, 2024 at 7:22

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