I bought a couple of Seeduino boards last year. So far I have made a couple of projects with them - always using USB power for them.
I’ve build a power monitor, using a Photo Transistor to count the number of flashes on the electricity meter to monitor power usage. I’m also using a DFRobot ethernet shield to enable the project to support SNMP connectivity.
However…I would like to use the setup with an external power supply rather than the USB power - I’ve tried both a 12v and a 7.5v power supply but with either of them connected the voltage regulator on the board is getting very hot after only a couple of minutes.
Is it normal for the regulator to run hot or do I need an alternative PSU - can anyone recommend a good supply? I have tried a mini-usb type phone charger but this does not appear to run the board correctly - application is not very stable…
Any help would be appreciated