Positive and negative linear regulated power supply

       The structure of the power board is very simple, consisting of a rectifier filter part and a voltage stabilizing part. Four 4007s form a FULL BRIDGE RECTIFIER (full bridge rectifier), two big green wave... (bah, it's filtering) capacitors are responsible for filtering the positive and negative voltages, and 7812/7912 are responsible for voltage stabilization (of course they can be replaced with others) Voltage stabilizing IC), two small-capacity electrolytics are used to smooth the output, four 0.1uf film capacitors are used to filter out high-frequency interference, and there is an LED at each output end for work indication.
       This power board can power the power amplifier preamplifier, headphone amplifier, DAC I/V conversion and LPF operational amplifier, etc. The voltage stabilizing IC can be replaced with other voltages according to needs, such as 7805/7905, 7809/7909, 7815/7915. The rectifier part adopts a discrete design and is compatible with more types of rectifiers (DO-41 packaged normal speed, fast recovery, and Schottky are available). AC input is recommended to be dual 12~18V (linear voltage regulation, higher voltage will cause the voltage regulator to increase heat, the voltage after rectification and filtering should not exceed the maximum input voltage of the voltage regulator!).
       Okay, the picture above~ (the picture is the first version, the LED is in SMD form, the official version has been changed to 3mm direct plug)
I used ON's MC7812/MC7912
to measure the output voltage, the accuracy is pretty good~
 
The PCB Gerber file and BOM table are here Attachments, if you are interested, you can buy the materials to make them yourself~