Comments on: 40V dual power supply

By: DUAL POWER SUPPLY | Quality Products Blog

DUAL POWER SUPPLY | Quality Products Blog — Thu, 14 Jul 2011 13:16:20 +0000

[...] dual power supply circuitstoday.com [...]

By: keith

keith — Wed, 02 Mar 2011 11:50:21 +0000

hi seetharaman, so if I want to change this power supply to a variable one, potentiometers at the output are not enough ?

By: admin

admin — Mon, 28 Feb 2011 09:01:05 +0000

For using this power supply to power two 150W amp modules slight modifications are required

Transformer must be raised to 350 VA.
Current rating of the bridge must be raised to 12 or 15 A.
Fuses must be changed to 12A.

By: segzy

segzy — Wed, 24 Nov 2010 21:40:19 +0000

u’re jst xcelent.u tak d pain 2find soln 2peopls prblems.u’re a ist clas engr and mentor. thanks and kep it up

By: Seetharaman

Seetharaman — Wed, 29 Sep 2010 17:07:43 +0000

Hi Mounica you require a maximum current limitting of 30% of the rated battery capacity that is 30amps (for flat battery of less than 11volts terminal voltage)and normal charging current of 1/10 of the rating that is 10 amps at 12volt.

By: mounica

mounica — Wed, 29 Sep 2010 16:26:06 +0000

can you give me that external charging circuit

By: Seetharaman

Seetharaman — Wed, 29 Sep 2010 10:05:11 +0000

Hi Mounica you can use 100AHbattery for operating the UPS but it is not rated to charge it, hence you have use an external charger.
Hi Adnan When you bridge two identical amplifiers into the speaker of same impedance, then it will give 4 times the rated power. i will email you the details

By: mounica

mounica — Wed, 29 Sep 2010 08:40:53 +0000

Hello seethraman i have APC ES-500 UPS it has 12v 7Ah battery
can i use 12v 100Ah battery instead of 7Ah
this 100Ah battery will spoil the ups?

By: Adnan

Adnan — Tue, 28 Sep 2010 19:24:28 +0000

what changing will i have to do for increase or decrease the voltage?

By: Seetharaman

Seetharaman — Tue, 28 Sep 2010 17:13:12 +0000

Hi Adnan Use a power transistor like 2N3055 with 12 volt zener in the base collector circuit and connect collector emitter to filter capacitor. the following site will give you the idea and design of shunt regulator
http://www.tpub.com/content/neets/14179/css/14179_212.htm