/diy/ - Do It Yourself

>>2726986
>something that could be improved

it's 10x more useful if it's variable.
pic is dual polarity, variable, 0 to 30V.

>something absolutely retarded in this circuit?

all the diodes are wired wrong.
prob you wired them correctly, but drew them wrong.
coz, as shown, they've would've smoked and died.

>>2460052
>how do bench power supplies produce low voltages down to 0v?

one way is to send the reference voltage not to ground, but to a negative voltage equal to the ref voltage.
this lets you go to zero, where everyone is happy and gay.

>>1902127
>What would be appropriate values for the capacitors?

always the same rule of thumb: 1000uF per amp of expected output.

if you use this variation of the circuit (pic) then the output will go very close to zero volts instead of a min. of +1.25 and -1.25.