Home made (fit in Drawer Parts Cabinet) CC CV mini power supply :)

[capwizard]

Home made (fits in Drawer Parts Cabinet) adjustable CV (1.2v -30v) CC (0ma-2A) mini power supply

This is the power supply which I use the most, instead of my heavy HP bench top power supply.

First: Find an AC adapter DC output 28v – 30v, then go to Step 2.

Step 1:. cant find it . I grab one AC adapter (9v 2.2A) from junk pile. First we need to jack up the voltage to 30v, take out 2 capacitors and a 9vZener diode on 9v voltage line. Put a 500K potentiometer on TL431 leg 1 (ref). Now you have an AC adapter DC output 24v – 33v.

Step2: IF you have a 30v dc power supply, put a cc cv led meter , now you have a 30v CC CV DC power supply with LED METER.

reference from:
BenchTop Power Supply with XL4005
http://remcoterol.blogspot.com/2015/...t-finisht.html

[budm]

Re: Home made (fit in Drawer Parts Cabinet) CC CV mini power supply

How well are those meters, especially the CC module. Do you have the spec of the module you use?

[capwizard]

Re: Home made (fit in Drawer Parts Cabinet) CC CV mini power supply

Yes, The module is this:
5A Adjustable CC/CV Step Down buck converter charge Module. LED Panel Voltmeter Ammeter. IC is xl4005, It is originally designed for RC lithium-ion battery charger.

Review 1:
Buck Converter DC/DC PSU has Voltmeter and Ammeter and a Bug!
https://www.youtube.com/watch?v=tOFvfZyXLzY

A really compact buck converter with constant current control and voltage and current digital LED displays. It works well, but be careful when shorting the output terminals!

don't short circuit this module at lowest voltage set point, the circuit with the op-amp and the shunt resistor won't work. Current is limited by the XL4005 it self, that will be 5.5A !!.

Review 2:
Battery Charger / Power Supply
https://www.youtube.com/watch?v=3WJVHM5RE00

This is a nice inexpensive down converter that can be used for a power supply or a battery charger.*
Check this idea out: You can charge your project battery with this module then simply turn it around and run your project using the converter as the power supply. In this way you can set it to any voltage for the project and add the amount of current limiting you need to be safe. You probably don't need a fuse on the battery anymore.

http://www.icstation.com/current-volt...
5V-30V 5A Red Current Voltage Display Step Down Module LED Panel

This discount code may apply for 10% off. (one time)
Code: Dadics*

SKU: 2455

Description
Module Properties:Non-isolated step-down module
Rectification:Non-Synchronous Rectification
Input Voltage:5V-30V
Output Voltage:0.8V-29V
Output Current:Max 5A (over 3A to enhance heat dissipation)
Conversion efficiency:95% (the highest)
Switching frequency:300KHz
Output Ripple:50mV (max) 20M Bandwidth
Load Regulation:+/-0.5%
Voltage Regulation:+/-2.5%
Operating Temperature:-40℃ to +85℃
Size:51*26.3*14 (L*W*H)(mm)*
Module Name:Current and voltage table
Measurement Accuracy:0.1%
Refresh rate:About 200ms time
Display: Dual 4bits 0.28" digital tube
Current Range:0A-5A
Voltage range:5V-30V
Operating Current:Less than 15mA
Display Color:Red
Storage Temperature:-10℃ to +65℃
Input impedance:50 milliohms
External dimensions:51*26.3*10mm
Rechargeable lithium-ion battery

When the lithium-ion battery voltage is relatively low, if the direct use of constant voltage charging, the voltage difference due to the larger, leading the charge current is too large, resulting in damage to the battery, so when you want to start using the constant battery current charging, when the charge to a certain extent automatically switches back when the constant voltage charging.

Module above indicated IN-(input negative), IN+(positive input), OUT-(negative output), OUT+(positive output) must be connected to the right, otherwise may cause damage to the module.


Where to buy:

https://www.aliexpress.com/item/5A-A...2-175737bd8abc