Author Topic: 24v ac power pack help  (Read 1661 times)

0 Members and 1 Guest are viewing this topic.

Offline pillsburry

  • Newbie
  • Posts: 3
  • Country: gb
24v ac power pack help
« on: May 27, 2016, 12:24:25 pm »
hi all i'm in need of a 24v ac power pack for a old jvc ptz cctv camera i got a 34v ac one but was wondering is there a easy way i can convert this to 24v ac insted of 34v ac any help would be great thank you all

 

Offline danadak

  • Super Contributor
  • ***
  • Posts: 1875
  • Country: us
  • Reactor Operator SSN-583, Retired EE
« Last Edit: May 27, 2016, 12:31:12 pm by danadak »
Love Cypress PSOC, ATTiny, Bit Slice, OpAmps, Oscilloscopes, and Analog Gurus like Pease, Miller, Widlar, Dobkin, obsessed with being an engineer
 

Offline pillsburry

  • Newbie
  • Posts: 3
  • Country: gb
Re: 24v ac power pack help
« Reply #2 on: May 27, 2016, 12:31:22 pm »
thank will take a look now
 

Offline Richard Crowley

  • Super Contributor
  • ***
  • Posts: 4310
  • Country: us
  • KE7GKP
Re: 24v ac power pack help
« Reply #3 on: May 27, 2016, 12:42:40 pm »
A variac is a handy tool on the workbench, but it isn't very suitable as a long-term solution.  It is large, heavy, expensive, and vulnerable to mis-adjustment unless you tie-down the knob somehow. 

Line-lump (or wall-wart) power supplies are pretty inexpensive and quite possibly available for free if you are a savvy recycler.

Perhaps beyond your current ability to evaluate, but it is possible that the gadget could tolerate the 34V without significant trauma.

Remember, however, that in addition to matching the VOLTAGE, you must also have a power source capable of at least as much CURRENT as the load requires.
 

Offline Shock

  • Super Contributor
  • ***
  • Posts: 2869
  • Country: au
Re: 24v ac power pack help
« Reply #4 on: May 27, 2016, 04:46:51 pm »
Buy the correct power pack. As mentioned check the maximum current draw of either the original or look at what the camera uses and then allow plenty of headroom (say 20%). Consider if you need to power more than one camera before buying. Avoid buying a cheap Chinese knockoff off Ebay as they can be junk and dangerous.
Soldering/Rework: Pace ADS200, Pace MBT350
Multimeters: Fluke 87V, 117, 27/FM     >>> Fluke 51/52 Thermometer Parts Required <<<
Oscilloscopes: Rigol DS1054Z, Phillips PM3065
 

Offline jitter

  • Frequent Contributor
  • **
  • Posts: 804
  • Country: nl
Re: 24v ac power pack help
« Reply #5 on: May 28, 2016, 05:17:14 am »
hi all i'm in need of a 24v ac power pack for a old jvc ptz cctv camera i got a 34v ac one but was wondering is there a easy way i can convert this to 24v ac insted of 34v ac any help would be great thank you all

I wonder if this camera might also work off a DC adapter. If it takes the AC and does nothing else than convert it into DC, it should. If it also needs the mains frequency for some reason, it probably won't.
 

Offline pillsburry

  • Newbie
  • Posts: 3
  • Country: gb
Re: 24v ac power pack help
« Reply #6 on: June 02, 2016, 07:45:49 am »
pos but dont fancy frying it though as expensive camera and a 24vac power brick is loads of pennys lol

considering i got the 34vac one just wont to hack it and drop volt to 24v

 

Offline christopher iles

  • Regular Contributor
  • *
  • Posts: 85
  • Country: gb
Re: 24v ac power pack help
« Reply #7 on: June 02, 2016, 11:14:47 am »
The JVC cameras will work on 24v ac or 12v dc. If you have a "wall wart" 12v dc 1Amp, that will run it.
It is not polarity conscious as there is a bridge rectifier inside the camera.
I would not suggest putting 34v ac across it as the maximum voltage they will tolerate is about 28v ac.
Hope this helps.
 

Offline CJay

  • Super Contributor
  • ***
  • Posts: 3404
  • Country: gb
  • M0UAW
Re: 24v ac power pack help
« Reply #8 on: June 02, 2016, 03:03:10 pm »
hi all i'm in need of a 24v ac power pack for a old jvc ptz cctv camera i got a 34v ac one but was wondering is there a easy way i can convert this to 24v ac insted of 34v ac any help would be great thank you all

I wonder if this camera might also work off a DC adapter. If it takes the AC and does nothing else than convert it into DC, it should. If it also needs the mains frequency for some reason, it probably won't.

Yes, well worth checking.

Quite a lot of the CCTV cameras I've worked with would use 12VDC as well but JVC do seem to have a number of cameras that only specify 24V AC, would of course be worth the OP checking specs.
M0UAW
 

Offline Shock

  • Super Contributor
  • ***
  • Posts: 2869
  • Country: au
Re: 24v ac power pack help
« Reply #9 on: June 03, 2016, 06:58:41 am »
OP is not listening, he just needs to look a little harder. There is one on Maplin I found for only 10 pounds. Sometimes it's just best to spend a few dollars than burn down your house on imaginary ideas that you are saving money.


Soldering/Rework: Pace ADS200, Pace MBT350
Multimeters: Fluke 87V, 117, 27/FM     >>> Fluke 51/52 Thermometer Parts Required <<<
Oscilloscopes: Rigol DS1054Z, Phillips PM3065
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf