I'm looking to build some low cost Voltage meters to do some production testing / monitoring.
Each device will be low power (Approx 0.5W 5V, 100mA). Running a MCU with ADC + Some seven segment displays.
Plan is to use a 24V DC bus and have each node run a isolated DC:DC step-down to power the device. I realise you can use a intergrated module to do this but I would like to know if there is a simple discrete solution out there anyone can recommend?