Variable A/C power outlet
I came up with this project mainly to control the performance of some appliances that I use on a daily basis that do not offer output control. For example, I can control the temperature of my 60W soldering iron or a dim a desk lamp that is connected to the unit. It does so by adjusting the output voltage using a simple triac circuit.
The circuit can be downloaded here.
A few specifications
- Rated for 650W (230V) based on the minimum current rating of the components that I used
- Included 2A MCB as an added safety
- Built in Voltmeter to indicate current output voltage
- Able to toggle between direct power connection and variable power connection
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| Circuit |
AC to DC Converter
While I was at it I wanted to make a small 5V power source to power my small projects and assignments. First I came up with this simple design.
But it could be better. So I salvaged a bigger transformer and came up with a multiple DC voltage power source. It does so by tapping the transformer at different points and passing the signal through a common rectifier bridge circuit. By switch on bottom right switch an additional Linear Regulator circuit is connected in series. Using the adjacent knob any fine tuning can be done.
A few specifications
- Switches to 8 fixed DC voltages between 5V and 32V with fine tuning.
- Always on LED voltage indicator
- All metal fixtures are earthed.
- Power on indicator
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