One of the issues I face when design projects, is to have a specific power supply.
For example, if my circuit will consume 5 volts and 20 mA, the lowest transformer for the power supply will be 5 volts and 100 mA. I haven't found any smaller transfomer
I would like to use a 5 volts and 30 mA transformer,
Do you know if there is a company that sells all kind of step down transformers ?
Switching power supplies probably are expensive for most of the projects I design