19 Threads found on edaboard.com: Opto rs232
if you need industrial standard...
I need industrial standard. I make two isolated power sources, one of them is for rs232 side and other is for RS485 side. Data lines are connected with opto-couplers. I can control both RE and DE pins of RS485 with RTS at rs232 side. But I saw some converters that manage this automati
Hobby Circuits and Small Projects Problems :: 28.11.2006 12:41 :: BasePointer :: Replies: 3 :: Views: 2088
they're mostly used as an electrical isolator (protection circuit), sometimes they're called opto-isolators
Some other optocouplers are 4N25, 4N26, 4N33, etc.
Hobby Circuits and Small Projects Problems :: 13.01.2007 11:17 :: the_risk_master :: Replies: 3 :: Views: 5045
This one was made some time ago - opto isolated, auto direction switching.
PC Programming and Interfacing :: 26.01.2007 15:38 :: umup :: Replies: 19 :: Views: 22075
can any one pls suggest me any opto couplers for rs232 bus with a min baud rate of 115200. i saw a couple of opto couplers but i couldnt find the speed grade in it.
thanks in advance
Microcontrollers :: 19.07.2007 00:27 :: s3034585 :: Replies: 2 :: Views: 1395
it should be small and will be work at any baud rate.
Any opto isolator will work as long as you know the pin assignment. The question is rather if it will fit whatever you plan to measure. There are OI of different sizes and shapes.
Microcontrollers :: 14.04.2008 10:48 :: Prototyp_V1.0 :: Replies: 6 :: Views: 3619
It depends if you need half or full-duplex communication. In one case you will need addressable nodes (like RS485). In the other case you will need to develop an arbitration protocol and use compatible drivers (3-state). No one can be reached using simple rs232 drivers unless, as already stated before, you need not to get an answer (all nodes can h
Digital communication :: 23.03.2009 00:11 :: pauloynski :: Replies: 3 :: Views: 3617
I'm designing an ECG cuircuit.
I need to use opto Coupler to isolate the human body from the electronic circuit and the power supply.
I've got 4N35 opto-coupler. I've the datasheet but still don't know how to connect the 4N35.
Anyone can help...?
Analog Circuit Design :: 15.06.2009 11:26 :: eng_shady00 :: Replies: 10 :: Views: 10261
Solution: opto-isolated balanced line driver/receiver combo, such as IL3585. RS-232 is unbalanced and very prone to noise.
Beware that in the case of opto-isolation every board should have it's own power supply.
Power Electronics :: 02.11.2011 08:45 :: ZASto :: Replies: 10 :: Views: 1561
Is your opto fast enough?
Professional Hardware and Electronics Design :: 11.01.2012 10:36 :: barry :: Replies: 5 :: Views: 919
Cool Morning to all!
I am interfacing My Micro board by max232 to My system.. Micro board consists of 4 relay . Each relay is driving up to 12V 2A current.. Resistive load.. Relays are Isolated by opto-cuopler (MCT6)... Without load total system is working fine. while connecting load System gets hanging problem.. mean
Electronic Elementary Questions :: 27.07.2013 00:40 :: prabhukaran3 :: Replies: 2 :: Views: 507
U can use a non-isolated 485 transceiver and 3 optocoupler (1-rx, 2-tx, 3-Sense)... and a floating powr source for transceiver...
If i have time I'll draw tomorrow a schematic for this...
PC Programming and Interfacing :: 21.01.2003 16:16 :: aNdreiBuuu :: Replies: 7 :: Views: 2418
Here there is a very good intro to IR:
and overview+pinout of most famous opto-devices:
Microcontrollers :: 12.05.2003 16:57 :: Ace-X :: Replies: 8 :: Views: 1497
many years ago there was a consumer product like this. It was specifically designed for the computer. There have been several expensive short wave radios from companies like ICOM that had rs232 ports.
Your best bet is to use opto isolators across the front panel push buttons and trigger them from the computer.
Professional Hardware and Electronics Design :: 03.12.2003 00:13 :: flatulent :: Replies: 9 :: Views: 3137
If your AC line is up 100 % you can make power free conversion like :
use serial ADC instead of parallel , it can be connected to rs232 instead of parallel port .
Supply adc directly from 220V and use ioptocoupler for rs 232 connection . You have to play with rs232 lines to get opto output into 232 voltage range as :
PC Programming and Interfacing :: 18.02.2005 07:29 :: artem :: Replies: 7 :: Views: 1602
If you don't require a lot of data to be transmitted, or very high speeds, I'd reccomend you either use RS-232 or you could use the parallel port on your computer and tie it (via a buffer or opto isolated) to the IO on your PIC.
If you go down the RS-232 path, as eltonjohn said - you CAN use FTDI usb->rs232 converter, or you cou
Analog Circuit Design :: 30.06.2009 01:53 :: BoBtHePlUmBeR :: Replies: 3 :: Views: 1642
Using opto-isolator: Schematics of delabs: rs232 with opto-Isolation
---------- Post added at 15:07 ---------- Previous post was at 15:03 ----------
PC Serial Port Receiver - Freecircuits.
PC Programming and Interfacing :: 02.10.2010 11:07 :: john blue :: Replies: 7 :: Views: 1813
i want optocoupler it's input is 5v that come from microcntroller and Vcc is also 5v.
Microcontrollers :: 15.06.2011 06:49 :: mshh :: Replies: 6 :: Views: 946
opto is always nice for ultimate safety but not really needed. You can send from micro direct to PC but not from PC to micro as this is +-12v. You need to remove the - and clamp 12 to 5v. You can google for simpler circuits rather than MAX232 if you want, but the max is a good option as well.
PC Programming and Interfacing :: 29.09.2011 09:58 :: GrandAlf :: Replies: 7 :: Views: 635
hi thanks for reply, the answer of your question is NO.
the meter doesnt include an irda modul.
it has just one 5mm ir led to receive and one photo diode or phototransistor or whatever to transmit
so i need a similar circuit with ir led and phototrans. to communicate
i think i need some transistors to drive the opto parts. and invert my rs2
RF, Microwave, Antennas and Optics :: 10.07.2013 04:15 :: adnan_merter :: Replies: 2 :: Views: 178