Power supply advice

Hi everyone,

I’m new to putting power supplies together, so I just want to check if im using the right practice…

I need a 12V power supply with 1 Amp for a solenoid…

Please see the image attached of my schematic and tell me if im on the right track,

please note that I haven’t filled in the variable resistors set values because I dont know what they need to be yet…

Thanks in advance


The voltage regulator looks ok. However I don't think you need the constant current regulator for the solenoid. The draw of the solenoid will be approx 1A because of its R, so you do not need to regulate the current.


Depending on the input voltage, you will also need a heat sink to dissipate

Power = (Vinput - Voutput) x 1Amp Watts.