help on voltage isolator

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alec82

Joined: 25 Oct 2006
Posts: 215
Helped: 65

12 Apr 2009 13:11 voltage isolator

hi guys
i need to make voltage isolator via optocopler .
anybody have idea to do that?
appreciate in advance

venix

Joined: 20 Mar 2008
Posts: 86
Helped: 9

13 Apr 2009 7:27 hcpl7510 application notes schematic examples

Hello!

Look at the following datasheets.You will find the circuit you need for and also the schematic.

http://rapidshare.com/files/220699769/Data_Sheets_-_Infra-Red___Optical_Devices_01.rar

Best regards!
Venix

alec82

Joined: 25 Oct 2006
Posts: 215
Helped: 65

13 Apr 2009 20:40 il300 isolator

hello
i want to isolate a signal that varied from 0 to 5 volt ? how i can do this?
regards

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13 Apr 2009 20:40 Ads

FvM

Joined: 22 Jan 2008
Posts: 5154
Helped: 766
Location: Bochum, Germany

13 Apr 2009 20:52 volt isolators

Vishay IL300 with a feedback circuit as suggested in the datasheet can do.

hakeen

Joined: 16 Jun 2005
Posts: 153
Helped: 16

15 May 2009 21:48 hcpl 7520 schematics

Or you can use a voltage sensor optocoupler like HCPL-7510/7520

The input range can be adjusted to +-320mV with resistor bridge. Output is given with a good linearity.

Cheers
Hakeen

smxx

Joined: 18 Aug 2005
Posts: 188
Helped: 8
Location: iran(ahwaz)

16 May 2009 4:16 voltage isolator 4

Hi
at 1st you need to convert the signal to Pulse by VCO,then use an OPTO coupler,and again convert the OPTO coupler OUTPUT pulse to voltage.
THere is many prefab circuit for this purpose.

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kender

Joined: 19 Jun 2005
Posts: 1231
Helped: 88
Location: Stanford, SF Bay Peninsula, California, Earth, Solar System, Milky Way

16 May 2009 4:35 iso4 opto

Look-up LOC110 made by Clare. It will need feedback amplifiers. The datasheet for the chip has good application circuits. Keep in mind that most linear optocouplers have a limited bandwidth. I have not seen a linear optocoupler with BW > 200kHz. What kind of signal do you want to isolate? What's you application, if it's not a secret?

Last edited by kender on 16 May 2009 18:44; edited 1 time in total

alec82

Joined: 25 Oct 2006
Posts: 215
Helped: 65

16 May 2009 6:59 induction isolator

hi friends
i'm going to use voltage isolator(actually signal isolator ) for sensing output voltage and current in smps circuits that have different ground .
i'm using pic mcu as controller and i want to isolate input analog signals.
best regards .

sunyuan

Joined: 18 May 2009
Posts: 15
Helped: 1

18 May 2009 2:46 voltage isolator 12 volt

Hi, you don't have to do it yourself.
Sunyuan ISO A(U)-P-O or ISO 4-20mA series will do. They have been making this part for years and you can count on them. Small, precise and inexpensive.

Check
http://www.szsunyuan.com/sy/pro_more.asp?Productid=508

http://www.szsunyuan.com/sy/pro_more.asp?Productid=537

alec82

Joined: 25 Oct 2006
Posts: 215
Helped: 65

22 May 2009 9:31 linear optocoupler isolator

dear sunyuan
above link is dead
r u sure the link typed correctly?
regards

sunyuan wrote:

Awarapunshee

Joined: 11 Jul 2007
Posts: 455
Helped: 60

22 May 2009 10:14 hcpl-7520 schematics

Following may help you:

http://www.smps.us/12volt-powersupply.html

ENJOY!

hakeen

Joined: 16 Jun 2005
Posts: 153
Helped: 16

27 May 2009 15:14 hcpl7510 as voltage isolator

Hi

This is what I used in the past. Just resistor bridge, with one of them is shunt for isolation amplifier.

Hope it helps Smile

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darling67

Joined: 29 May 2009
Posts: 4

29 May 2009 10:56 diy linear optocoupler circuit

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