Product specific power supplies

[daviddlc]

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

 

[Davood Amerion]

For Small current consumption (20mA≈50mA) and where power line isolation not needed, you can use transformerless power supply
for example check this link:
**broken link removed**