These were the voltages measured from the connectors with static voltages: I measured the voltages against the multimeter, and they were not completely on the dot but close. This is how the unit face looked like after it’s done. This is the complete circuit diagram, as it looks starting from the output wires from the PSUĪ 12V fan was powered uisng the 12V line and used for heat dissipation from inside the box by cutting some holes. Here I’m uisng two resistor in parallel and they are mounted on the metal casing to dissipate heat easily.įor the casing I used an Aluminum Electronics Box (8”圆”x3.5”). So we use a resistor to create a power drain as a solution. (500K and 200K) These come with knob.Īlso, most of the time the computer power supply is turning off automatically if no power is drained through it (if other words if it’s idle). The inbuilt voltage and current adjusting variable resistors in the board are removed and they are replaced with external variable restores with the same value that can be mounted on the casing that we use below. I’m also uisng a Voltmeter/Ammeter module with an LED display Used to power the “Stand By” indicator LED.Īpart from these standard 3.3V, 5V, 12V outputs I’m uisng a step up/down converter (LTC3780 DC 5V-32V to 1V-30V 10A) to provide an adjustable voltage. Jeremy is an engineer with 10 years experience at his full-time profession, and has a BSME from Clemson University. Purple : +5V when the power supply has power. 6 Slick Tools You Can Make for Your Electronics Workbench.Electronic components can be small and it’s a good idea to keep everything organized. The work area doesn’t need to be fancy and you could even build your own electronic workbench. Grey : +5V when the power supply is on. Before you get started, make sure your electronic workbench is properly set up.Green : to the on switch, connected to Black (0 V) thru the switch.The small gauge yellow, orange and red wired were also sorted with the normal gauge wires. The power supply was from an old Small Form Factor Dell Optiplex 390 and the first thing I did was open it up, cutoff the plastic connecters at the ends and sort the wire strands according to their color.
#Build electronic workbench Pc
Publishing a post after a while since I was busy with my work and some projects that were going on last few months, Anyway for some time I had an old mini form factor PC supply lying around and decided to make some use out of it by converting it to an electronic workbench power supply.
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