My first project in a very long time is going to be a bench power supply. Yes I am aware that I could have probably bought one for around the same price.
But I wanted this to be a project.
Yes I am aware that I can use a walwart but I wanted to use a transformer instead.
Yes I am aware that I can add a negative supply. That will come later.
The project is based on the one found here. I chose to break out the variable supply on it's own as I will need this for a future project. The supply will have a second output with a selectable 3.3, 5V, 9V and 12V. I might add 3V in the future.
The supply is not designed to be high amps. I figure 1 - 1.5 will do me for a while.
I plan to add a digital volt meter powered by as PIC1845K20. There might be better choices but I have a demo board with this chip and thought it was a wise choice to select a ucontroller the same as my demo board.
The ucontroller will also act as the selector for the various fixed voltages.
Attached is the schematic and parts list.
The PIC schematic will come later.
If someone could please have a look and make sure if I designed everything correctly. If there are things that will work but I could have done better please let me know. I plan to build the supply on a perf board first, so I could always improve it as I go.
But I wanted this to be a project.
Yes I am aware that I can use a walwart but I wanted to use a transformer instead.
Yes I am aware that I can add a negative supply. That will come later.
The project is based on the one found here. I chose to break out the variable supply on it's own as I will need this for a future project. The supply will have a second output with a selectable 3.3, 5V, 9V and 12V. I might add 3V in the future.
The supply is not designed to be high amps. I figure 1 - 1.5 will do me for a while.
I plan to add a digital volt meter powered by as PIC1845K20. There might be better choices but I have a demo board with this chip and thought it was a wise choice to select a ucontroller the same as my demo board.
The ucontroller will also act as the selector for the various fixed voltages.
Attached is the schematic and parts list.
The PIC schematic will come later.
If someone could please have a look and make sure if I designed everything correctly. If there are things that will work but I could have done better please let me know. I plan to build the supply on a perf board first, so I could always improve it as I go.
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