The TIP2955/TIP3055 transistors should be satisfactory for a power supply feeding a single amplifier. If two amplifiers are to be fed from a single power supply, these transistors should be changed to higher power devices such as the MJ2955/2N3055. Adequate heat-sinking must be provided for whichever transistors are used.
R9 and R10 can be replaced with [...]
Mod a 9V rechargeable battery to give you +3.6V, Ground and -3.6V.
You will appreciate this idea if you ever had to clobber together a bunch of AAs or AAAs to get a project working.
This instructable was meant to be part of a larger project, but I decided to submit this part alone to the 9V [...]
Every electronics laboratory needs a powerful regulated bench supply. In the model described here a microcontroller monitors the actual and desired current and voltage settings.There are many types of laboratory benchtop power supplies available, from the very simple to the highly sophisticated. They range from linear, purely analogue supplies with only voltage regulation to switching [...]
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