I have one power supply that gives me +5V at up to 500 mA and +/- 0-15V at up to 100 mA for general use with opamp circuits and microcontrollers, plus a 0-35V 5A supply for higher power stuff, and a collection of assorted AC and DC wall-warts. Seems to be adequate...
Ok, the power supplies I have are not expensive and also not the fancy programmable ones. As a beginner I bought mid range pricedYes. But you likely don't need 5A, if you want to buy a cheaper supply.
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