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 [...]
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 [...]
This is circuit Fix power supply Regulator 40V 2A for main Power Amplifier 30W. It is use IC LM317T (Hot IC Variable Regulator) and Transistor TIP42 for boost up Current to 2A max . Other detail see in circuit. A very good and powerful Regulated Power Supply section was implemented by simply adding a PNP [...]
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