6
votes
Pump Auto Shutoff
The MCU option is overkill only once; you acquire the programming equipment and software, and you acquire the knowledge to use them, and then you have that for life. In addition, you have a single 8-...
- 47k
3
votes
Do I need to add capacitors at each VDD VSS port of a MCU chip?
The Getting started with STM32F10xxx hardware development application note says:
2.2 Power supply schemes
The VDD pins must be connected to VDD with external decoupling capacitors (one 100 nF ...
- 20.1k
3
votes
RP2350 or RP2040 Power Setup
You're putting the horse in front of the cart by deciding on the microcontroller before considering the architecture.
You can either isolate the USB and use a 5V-capable microcontroller, then you'd ...
- 99.9k
2
votes
Deboucing a BEMF in BLDC motor control
If bldc_step does indeed vary from 1 to 6 (or actually 0 to 5, from reading the code), then bldc_step & 1 is only true for ...
- 3,002
1
vote
RP2350 or RP2040 Power Setup
No, you can't connect 5V to IOVDD. RP2040 has a maximum rating of of 3.63V after which it will damage. So you can't run it with 5v IO, and it needs no changes to any "capacitor setup" due to ...
- 172k
1
vote
Pump Auto Shutoff
When using low-power electronics to control anything with a motor in it, I frequently find that it's a lot easier to use a relay instead of a transistor. The on/off transitions are just as sharp as ...
- 1,128
1
vote
How to stop undefined behaviour on power loss in an Arduino?
Supplied with 12V AC, the DC output of your rectifier/capacitor arrangement should be about 15V or so. The 5V regulator will begin to drop out when its DC input falls below 8V, so you have plenty of ...
- 47k
Only top scored, non community-wiki answers of a minimum length are eligible