If I used a transformer that already output is 24v DC, Will is Ok? Or will I lose something?

NO!! In the instructions it states strictly 24V AC

Can I use 12V 1A transformer?????

You can use yes, you just can't connect a wire above 24v AC.

o/p voltage not more than 9v what could be the problems?

Firstly check the main transformer out put voltage if the transformer is OK showing the required voltage then check the IC and other component including main four diode.

what is 100k trimer for?

Evidently it is to set the output voltage to 0v when the output potentiometer (10K Pot marked 'V' on the board) is in it's minimum position.Have you not downloaded the PDF instructions for building this PSU??I haven't built mine yet, but the PDF tells you all the info about it including the above setup method. ... see more see less

Hi, as soon as I connect a load of even a few milliamps, the D1047 overheats so much that you can't even touch it. I mounted a heatsink but no fan. Is it normal or can I do some special checks?The LED never lights up. Thank you

Look at this site to update the circuit:... www.paulvdiyblogs.net slash 2015 slash 05 slash tuning-030v-dc-with-03a-psu-diy-kit.html

how can I use a 24 volt 3 amp centre tapped transformer

no. you can use 24-0 not 24-0-24

I assembled the power supply, connected to the AC transformer 24 volts. Output voltage ranges from 0 to 4 volts. What could be the problem?

If all the components checked OK before assembly, the probable culprit is the (not powerful enough) transformer.

The datasheet indicates a maximum supply voltage of 30V for the TL081. Is there not a risk by supplying them with a rectified and filtered 24V AC voltage, i.e. a DC voltage of about 35V?

OP07CP might do the job, It has a supply voltage of 44V max. It is pin compatible to TL081 and best of all, its cheap (*****,50)

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Pricio

0-30V 2mA - 3A Adjustable DC Regulated Power Supply Module DIY Kit

Name: 0-30V 2mA - 3A Adjustable DC Regulated Power Supply Module DIY Kit
Brand: Pricio
SKU: bg-958308
Price: 2000 INR
Availability: InStock
Rating: 5.0 (1795 reviews)

5.01,795 ratings

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Electronics for DIY enthusiasts and makers

The 0-30V 2mA - 3A Adjustable DC Regulated Power Supply Module DIY Kit by Pricio is a mid-range electronics designed for DIY enthusiasts and makers. Customers praise its easy to set up and use and excellent build quality. 100% of buyers rate it 4★ or above.

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SKU: bg-958308Category: Electronics

About This Product

The 0-30V 2mA - 3A Adjustable DC Regulated Power Supply Module DIY Kit by Pricio is a mid-range electronics designed for DIY enthusiasts and makers. Customers highlight its easy to set up and use and excellent build quality.

Customer Verdict

100% of buyers rated this product 4 stars or above. The most appreciated qualities are: easy to set up and use, excellent build quality, great value for money, fast and responsive.

Why Buy from Pricio?

Pricio sources this product directly, cutting out multiple middlemen. Every order includes free shipping, a 15-day return policy, and secure payment via Razorpay.

Description:

This circuit voltage can be from 0 v, output current can be ma from 2 to 3 a continuously adjustable, set the output current, if the experiment circuit exceeds the current (including short circuit), the circuit protection immediately, not cause danger such as burning device, it is electronic manufacture's right-hand man. Like making all kinds of audio circuit friend, due to the different working voltage and circuit have a headache, this circuit can also two series into a dual power supply, can meet the needs of all sorts of use.
English manual:

Feature:
Input voltage: 24V AC Input current: 3A maximum Output voltage: 0 to 30V continuous adjustable Output current: 2mA - 3A continuously adjustable

Output voltage ripple: minimum 0.01%

All straight inserted element, make easy, only an adjustable components ( used to adjust the voltage of 0 v ) LED indicator for output over current, when the current exceeds the set data circuit protection, LED lighting, over load and short circuit protection Minimum current (2mA) under the measurable leds and zener diode

Notice:
Power production belongs to the high voltage large current circuit, please be sure to carefully, otherwise may cause harm to the personal safety.

Package included:

1 x Adjustable DC Regulated Power Supply DIY Kit

Note:

The finished product is for reference only, and the parts may be inconsistent, which does not affect operation and use.
If you need to add a heat sink and fan, follow the installation location as shown below. Note that you need to bring your own heat sink and fan, the package does not include a heat sink and fan.

Product Safety Information

Setup Guide

Identify the pins

Locate VCC (power), GND (ground), and data pins (SDA/SCL for I2C, MOSI/MISO for SPI, or TX/RX for UART). Refer to the pinout diagram on the product page.

Wire to your microcontroller

Connect VCC to 3.3V or 5V (check the module spec), GND to GND, and data pins to the appropriate GPIO pins on your Arduino or Raspberry Pi.

Install libraries

In Arduino IDE, go to Sketch → Include Library → Manage Libraries and search for the sensor library. Install the recommended version.

Upload example sketch

Open File → Examples → [library name] → Basic Example. Upload to your board and open Serial Monitor to view output.

Calibrate if needed

Some sensors (temperature, humidity, distance) may need a short warm-up period or calibration. Run the calibration sketch if provided.

0-30V 2mA - 3A Adjustable DC Regulated Power Supply Module DIY Kit

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