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12v To 19v

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12 Threads found on 12v To 19v
I have a asus router with a power rating of 19v @ 1.58A max for which I need battery backup for 1~2 hrs daily because of power outages. Now I have 12v 7AH exide battery of an old ups which still works. I also have a 12v 2A power adapter and a universal laptop charger which provide variable voltage from 15V to 18V at 4A and from 20V to (...)
Depends greatly on your heatsink thermal resistance how much current and heat rise to say 70'C I succesfully use 4S on 12v on AWG18 with 30AWG drops for Rs equalization of 0.1Ohm or 6S on 18 or 19v or 8S on 24V or 24S on 48V. So no loss on regulator and adjust supply drop with long wire suitable guage for 100% voltage matched between supply an
If using prewired Molex then 12v and 5V is correct. 19v will burn out some components. go to BIOS to check CDROM is present and jumpered correctly on drive if using ribbon cable.
Your 14 VAC transformer puts out 19v peaks. This is sufficient amplitude to provide bursts of current to a 12v battery. This simulation shows a charging session (theoretical). Battery voltage starts at Time has
I would like to reproduce using a 24V battery in order to test a device a solar panel that delivers 18-19v with a maximum current of 300mA. I have built a regulator using the L200 IC with both voltage and current regulation: when the load required more than 300mA the output voltage dropped to 12v. I have also built a current limiter using two PNP t
pls can 0.33uF as input, CI and 0.1uF, Co, output capacitors withstand a 12v 5A DC SUPPLY! IF NOT, is there a calculator or formular for determining the values of input and output capacitors to be used in any DC supply circuit!
Convert to use laptop in car. Thanks a lot
You will need a DC/DC converter like the one in this link Unfortunately a 12v/7Ah battery will be not enough to power your laptop for about 12 hours. Let's assume your laptop will require 3A at 19v: it is 57Wh. Multiplied for 12 hours it will be 684W/12h Your 12v battery capacity is 84Wh, so ass
Hi, Basically i have 19v 4A laptop PSU, i have want to use it for my IDE->USB converter as is orignal PSU unit gives 1 amp on both 12v and 5v, i know that i can use 7805/7812 directly but there output is 1A, is there any way i can get 2A on both out using simple schematic ? please help me
I think the item you require is in-car dc-dc converter (12v to 19v). It is sold in computer shop & used to charge Laptop in a vehicle. If you're thinking of building one yourself there's quite a number of projects available in the Net. One using the MC34063 or the TL494 are quite common.
Hi, i need to build a step-up converter which has an input range about 12v to 13.8v. The input needs to be step-up to 18.5/19v. The problem lies with the output current as it must be able to generate a max of 3.5A to the load. This is for typically laptop purpose.thx. Any schematics or suggestions?..
Hi! Elektor have done an easy-to-build 12v car battery in/19v 5A '3524-based Laptop Adaptor with PCB layout that can be adapted to give you suitable outputs by amending the 56uH series chopper inductor - I'll post the article as soon as I can find it - is it any use? Chris Williams PS! Eurocircuits can supply old Elektor PCBs - I got on

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