How To Make A 14V, 15A Car Battery Charger, From ATX PowerSupply (Part-1)
what is ATX?
The most well known power supplies of a high current low voltage are AT or ATX supplies from computers. Their disadvantage is a poorly regulated output voltage and often a need to load both of the two main outputs (5 and 12V) at the same time. Therefore, I present a simple modification of an AT or ATX PC power supply to an adjustable battery charger 3 - 15V with a short circuit protection. proper regulation and an output current corresponding to the original 12V output. The voltage feedback is connected to pin 1 of TL494 control chip (or its equivalent KA7500, KIA494, DBL494 ...). The reference voltage is 2.5 V (i.e. the circuit regulates the output voltage so that the voltage of the resistive divider is 2.5 V). Originally the feedback is connected to both 5 and 12V outputs and it works well only when both outputs are loaded. After this modification, the feedback is only connected to the 12V output. A potentiometer regulates the voltage from 3 to 15 V. The potentiometer can be replaced by a fixed resistor to set a constant voltage if needed
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#batterycharger #charger #12v #powersupply #atx #smps
Пікірлер: 88
Part-3
Love this. Got an ATX supply gathering dust on my shelf, but I think I'll mount the pot so it's accessible from outside, as sometimes a higher 15V output is handy for desulfation purposes. The simplicity of this build is just nothing short of elegant.
Computer power supplies are great 👍 good build my friend have a blessed day 🙏 😇 🌞
This the most exact video i've seen in making psu as battery chrger
You have done a very good job!
Wow
Awesome 💪
Always good 🙂👍
Does it remain short circut and overload protection after this type modification?
Nice
Be careful with the caps when doing this, never forget to discharge thous!!
Thanks, ধন্যবাদ।
Great work my friend. I have ATX Power Supply but + 12 V 19 A, and also +12 V 8A. Can I use this kind of combination and how.
DC 12V 10A Switching Power Supply Regulated Transformer can be use for charger bike battery?
Nice I did this method with more than 8 pc supply but not success all of supply china made when I connect it with 100 watt bulp in series that work from 4v to 15 but when I connect it with series lamp it shutdown even 12.9v
Muchas gracias, he podido sacar 15v antes q la protección se active. El integrado de mi fuente fue sdc 7500.
Hello
Yes, my friend, this is the way to do it right.
I can not tell you how many power supplies i have thrown away, the computer
Without series lamp pc supply shutdown at around 12.9v