DIY

Regulated power supply with programmable parameters

Regulated power supply with programmable parameters

In this article, a DIY master will tell us how he made a power supply in an old computer unit ATX power supply. The device is not cheap, about $ 60, but it is cheaper than buying a ready-made device.
The technical characteristics of the device are as follows:
Power – 160 W
Power – 100-240 VAC
Adjustable output voltage 0 -32 V
Adjustable output current 0 – 5 A DC
10-slot programmable parameters
Two quick access slots
Output voltage resolution: 0.01 V
Output current resolution: 0.001 A
Output voltage accuracy: +/- (0.5% + 1 digit )
Accuracy of output current: +/- (0.5% + 2 digits)
Tools and materials:
– Defective power supply unit;
– DPH5005 digital programmable power supply; – AC power module; – DC jack; – Test lead set; – LM2596 buck converter; – Foam tape; – Brass spacers; – Soldering iron; -Third hand; -Engraver;
-Drilling machine;
-Set of tools for crimping terminals-Files; -3D-printer; -PLA filament; -Multimeter;
Step one: 3D-printing the front panel < br> The wizard started measuring the front of the ATX power supply. This is where the display and connectors will be located. Then I measured the dimensions of the DSP5005 and the banana sockets. There is also a USB connector on the panel, although he did not install it.
After measuring in fusion 360 software, I designed a front panel for printing on a printer.
Print options: no support, resolution 0.12, 20% PLA coverage.
 Regulated power supply with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Regulated power supply unit with programmable parameters Step two : checking the power supply
The computer power supply has been broken, but it will not hurt to check it. Perhaps some parts are workable and useful in the future.
To check the power supply, you need to bridge pins 16 and 17 on the 24-pin connector and check if at least the fan is working. Then, using a multimeter, check the voltage at the contacts.
After checking, disassembles the power supply. For further work you will need a case, a fan and an AC connector.
Adjustable power supply unit with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Step three: finalizing the case
Using the printed front panel as a stencil, the wizard makes markings on the wall of the power supply.
 Regulated power supply unit with programmable parameters Regulated power supply with programmable parameters Then cuts out holes.
Adjustable block power supply with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Adjustable power supply unit with programmable parameters Step four : assembly
Then proceeds to the assembly of the power supply.
Installation of components is carried out according to the scheme.
Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Using a multimeter, sets the output voltage of the regulator to supply the fan to 12V. Connects the fan and reducing the voltage adjusts the fan speed to “weak”. The main thing is that it spins slightly and removes heat.
Adjustable power supply unit with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters Adjustable power supply unit with programmable parameters In progress installation, it turned out that the fan does not fit in the case. Then the master just fixed it on top.
Regulated power supply with programmable parameters Regulated power supply with programmable parameters He glued a seal on the bottom of the case as legs.
Adjustable power supply unit with programmable parameters Regulated power supply with programmable parameters All is ready. After assembly, the wizard turned on the device and tested it. The test showed excellent results. By clicking the set button and the encoder button, you can move the cursor over the voltage digits and use the knob to increase and decrease the values.
As mentioned earlier, up to 10 voltage and current parameters can be programmed on the device. Two of them can be quickly obtained by holding m1 or m2.
Adjustable power supply with programmable parameters Adjustable power supply unit with programmable parameters You can watch the assembly and testing of the device in the video.

Source:

usamodelkina.ru

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