Interfacing Optocoupler |
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56 Threads found on edaboard.com: Interfacing Optocoupler
HI boys,
please, can you help me?
To this day I use optocoupler PC817 to interfacing atmel or pic input with other devices - switches, relay contacts, etc.
Now I make redesign of pcb and need smaller size. pc817 is very big. I need some another circuit such as transistor, zener diodes etc. Connection will be same - switch NO NC, or contact of
Microcontrollers :: 01.08.2012 22:50 :: darksir :: Replies: 3 :: Views: 387
The ring detection circuit is working perfectly. I checked the output of the opto-coupler.
I am having quite a few problems with interfacing the 56k modems to the microcontroller. In the past, I had some old 9600 baud modems that worked perfectly with the micro-controllers. Now I had to swithover to 56k modems but operate them on the same 9600ba
Professional Hardware and Electronics Design :: 11.09.2004 14:42 :: techie :: Replies: 14 :: Views: 2506
how do we go about interfacing an analog input into the microcontroller ADC pin?
- current limiting? (depending on the max current allowed at the pin)
- capacitors to filter out noise?
- i've seen a circuit that before going into the pin, the analog signal goes through a resistor (quite small about 22 Ohm). THe resistor is said to provide "dampi
Microcontrollers :: 29.12.2004 05:24 :: banh :: Replies: 8 :: Views: 1496
Hi.
I do ZCD for AC Power lines.
I read application note of Microchip AN521. This application note explain for interfacing AC Power lines directely connect with Microchip I/O Pin.
My Problem is they told Phase connect with I/O pin of microchip but they cannot mention what about connection nutral.
Is it required to connection of Nutral .?
Microcontrollers :: 07.04.2005 10:16 :: rahul_sanghavi :: Replies: 1 :: Views: 1378
Your post says that this is a "Sensor interfacing circuit" but I actually don't know where is your sensor !!!
If I'm correct then I guess the sinusoidal function generator represents the sensor, that's why you mentioned it's voltage changes from 0.6V to 40V.
The only thing I couldn't figure is how may the sensor change with a frequency of 100Hz?
Hobby Circuits and Small Projects Problems :: 01.06.2006 09:23 :: Ahmed Ragab :: Replies: 9 :: Views: 1268
give me the idea about isolation circuit
i mean any means to isolate the main circuit while interfacing with power line
normally for power line communication to transmit/receive data
isolation circuit may be any form of transformer
Other Design :: 13.07.2006 10:02 :: Suraj Shrestha :: Replies: 2 :: Views: 1043
hi all, i'd like to find out more about this and would appreciate any help. the ignition (rpm) signal is at 12v and is a square wave signal.
what would be the best way to interface this signal to a microcontroller? do i have to use a comparator or adc or some other way?
thanks for any help.
Analog Circuit Design :: 12.12.2008 00:54 :: 4eftefj :: Replies: 4 :: Views: 964
Hello,
I am using "ADC0804 with optocoupler" and 8051 for measuring Analog Voltage.
Now I want to use MCP3202 which is SPI Protocol Based, Becasue is required
Less pins to interface with 8051 Microcontroller.
I have read from datasheet that It required ?Anti-Aliasing Analog"
which is MCP601".
My Question is that How I know MCP601 i
Analog Circuit Design :: 06.04.2009 19:50 :: karan123 :: Replies: 2 :: Views: 1658
Hello,
I am using "ADC0804 with optocoupler" and 8051 for measuring Analog Voltage.
Now I want to use MCP3202 which is SPI Protocol Based, Becasue is required
Less pins to interface with 8051 Microcontroller.
I have read from datasheet that It required ?Anti-Aliasing Analog"
which is MCP601".
My Question is that How I know MCP601 i
Microcontrollers :: 06.04.2009 19:53 :: karan123 :: Replies: 0 :: Views: 1575
I have car with CDI type ignition system. I need to detect the rpm of the engine through electrical means. How do I interface a microcontroller circuit with the engine's spark coil.
regards
Microcontrollers :: 13.06.2009 14:20 :: Faizan Jawaid :: Replies: 18 :: Views: 5127
Dear all,
I am doing a project using LPG detector. I need to interface the LPG detector to 8051. can Anybody help me, how to interface the LPG dector to 8051 and send me the circuit digram also.
and guide me, which sensor is best for this, which also available in tamilnadu.
Best Regards,
R. B. Raju
Microcontrollers :: 09.11.2009 06:50 :: Raju_epigon :: Replies: 3 :: Views: 1676
Hello!
I want to turn on and turn off LED which is connect on RS232, COM, Serial Port on computer from Visual Studio 2005. I tried with DTR and RTS.
I used code in Visual Studio 2005
Code:
SerialPort1.Open
SerialPort1.RtsEnable = True
SerialPort1.BreakState = True
And for turning off
Code:
SerialPort1.Open
SerialP
PC Programming and Interfacing :: 19.12.2009 10:37 :: 78L05 :: Replies: 5 :: Views: 1661
Dear friends,
I want interface the mechanical relay with FPGA. Can any body help me. Please send me the circuit. I want use the following things: MCT2E, SL100 and IN4007. I am waiting for ur response.
thank u.
with
regards
raj
PLD, SPLD, GAL, CPLD, FPGA Design :: 06.12.2010 05:40 :: rajnaren5 :: Replies: 3 :: Views: 652
Hi everybody,
I'm new in avr programming, and here is my problem:
I would like to sample a dc source who varies from 0V to 15 Volts, and we know that the adc of most mcu don't accept a voltage higher than 5V. The question is how to interface this voltage to my ATmega16.
Second problem: Is it possible to isolate this dc source from the mcu lik
Microcontrollers :: 30.01.2011 23:09 :: yokohama :: Replies: 14 :: Views: 2147
Hello,
I am trying to interface some 5V TTL signals through an optocoupler to a microchip PIC16C55A microcontroller. I need to calculate the current to drive my opto with so that I won't damage the input of my micro.
When I went to the datasheet for the PIC, I found that:
Max. current into an in
Electronic Elementary Questions :: 08.06.2011 16:32 :: droseman :: Replies: 4 :: Views: 329
I've done some experiments with linear optocouplers. Although Perkin-Elmer, not Vishay, but results weren't actually that good. The signal coupled drifted heavily with temperature. Also reaching steady state took quite a long time.
If you are looking for something easier, i'd suggest getting some standalone ADC or a small microcontroller which ha
Analog Circuit Design :: 15.09.2011 18:25 :: poorchava :: Replies: 12 :: Views: 3664
If you just want to send from the 5V to the 3.3V, then use a potential divider.
The first method on this page:
---------- Post added at 19:32 ---------- Previous post was at 19:28 ----------
To
Electronic Elementary Questions :: 12.05.2012 20:32 :: FoxyRick :: Replies: 10 :: Views: 543
please tell me how to interface single phase energy meter with 16f73 via optocoupler
Microcontrollers :: 02.07.2012 08:36 :: uett :: Replies: 1 :: Views: 363
If you only want to connect the output to your microcontroller,
you do not need to worry about the current. The current specification
is for those designer who want to drive a load directly.
A pull down resistor will be more than enough to interface to your microcontroller.
Some standard ways of interfacing npn or pnp transistor.
w
Electronic Elementary Questions :: 05.12.2012 15:27 :: siongboon :: Replies: 1 :: Views: 199
Hi everyone
i am working on project in which i have to fetch data from a 3 phase ac power supply and monitor it and correspondingly control a water pump depending upon the power supply status. Please guide me about the sensors and the controllers that i can use .
Thanking you in advance
:)
Hobby Circuits and Small Projects Problems :: 30.05.2013 09:01 :: shiven :: Replies: 4 :: Views: 128
interfacing digital devices like DA's with optocoupler's is sometimes a little bit tricky if you want to realise high data throughput. in order to save current, you normally have to make a compromise between the rise-time (fast with lowest value of pullup resistor, where optocoupler transistor output doesnt saturate) and power dissipation (...)
PC Programming and Interfacing :: 16.09.2002 19:53 :: tiwag :: Replies: 8 :: Views: 2033
Two Transistors Form Bidirectional Level Translator:
interfacing the 3-volt DataFlash with a 5-volt System:
Professional Hardware and Electronics Design :: 11.05.2004 16:27 :: ME :: Replies: 40 :: Views: 38851
Let´s try it now.
The opto is very expensive and I had some problems, maybe a good selected capacitor with the 680K resistance could improve the circuit.
thanks
insteed of simple opto why not you used MOC3020 or MOC3040 the 3040
come with built in zero cross and suitable for interfacing and controlling 220vac direct fr
Hobby Circuits and Small Projects Problems :: 28.06.2004 15:43 :: Fragrance :: Replies: 17 :: Views: 5487
interfacing between micro and ac 220 V you need optocoupler ang try controlling the motor using phase ship method
Microcontrollers :: 29.12.2004 07:25 :: e_eja :: Replies: 10 :: Views: 4948
You're not the first person to ask questions like this here - is this a lab project by any chance?
Anyway, see this thread for Java libraries for parallel port access:
Check here for a parallel port doc:
And here for some basic parallel port in
PC Programming and Interfacing :: 03.02.2005 23:11 :: FoxyRick :: Replies: 7 :: Views: 1402
The ratio of this CT is 1:2500, so does that mean if i feed 5 Amperes i'll get 2mA current?
and what does these mounting pin means....does it mean only ffor mounting on pcb and no interfacing with circuit?
Analog Circuit Design :: 10.01.2006 09:37 :: lats :: Replies: 34 :: Views: 12009
Hi
First of all, it would be good to analyze the signal you have, I mean does it only take values of 5.8V and 5.2V? doesnt it take values such as 5.4, 5.5 or 5.6V? If the answer for my second question is yes, then you need to define a threshold of your signal for which it can be represented by "0" or "1" by the TTL circuit. The reason for this,
Electronic Elementary Questions :: 02.02.2006 08:32 :: Sal :: Replies: 6 :: Views: 785
Hello again
The ICD2 clone works fine with pic18Fs (5V). It should work with 3.3V pics but it doesn't.:cry:
It has 74HC/HCT125 3-state buffer/line driver and I'm interfacing it right.
With a scope, I can see activity on DAT and CLK lines, but I always get the same:
Invalid target device id (expected=0x445, read=0x0)
I'm trying to program a PIC
Microcontrollers :: 19.08.2007 13:26 :: elec_gu :: Replies: 1853 :: Views: 470512
do u want to measure the voltage and frequency of the supply using microcontroller and display it in LCD or computer. Better you use a step down transformer. I had given some tutorials how to do it using parallel port of computer in my book
MY EXPERIENCE IN PARALLEL PORT interfacing
you can get it from yahoo group-booksbybibin
groups.yah
Microcontrollers :: 08.05.2006 17:22 :: yogi :: Replies: 15 :: Views: 1637
Hi Izua
You would definetly need buffer ICs for the interfacing. The LPT port cannot give current more than a few milli amps. So it cannot drive the 7seg leds direct.
You can connect the bcd to 7seg converter( 4 pins) and use a 3 to 8 demux or 4 to 16 demux to do the scanning of the 7 segments.
in any case the 8 digital outputs can be comfort
Hobby Circuits and Small Projects Problems :: 02.11.2006 10:58 :: kannan.k :: Replies: 8 :: Views: 1217
I am quite interested in your topic..Could you post the schematic? I have done microcontroller interfacing to 7-segment led display n control using assembly language...I feel like want to try control through my pc...how? Can teach me...Thanks
Professional Hardware and Electronics Design :: 12.04.2007 17:13 :: conchunchun :: Replies: 10 :: Views: 2415
hi. the paralle port is very limited as a current source. It you overload it, you will damage your motherboard. try using an isolation circuit to prevent loading. The ULN is good motor driver but you have to ensure proper isolation. interfacing problem is a common in this kind of setup. better check the data sheets for the parallel port and your de
Electronic Elementary Questions :: 16.07.2007 03:58 :: bbgil :: Replies: 10 :: Views: 1732
:D
Hi,I am also working with stepper motor(Bi polar) interfacing with dsPIC30f2010.
To use optocoupler, first connect the output of MCU/logic CKT to optocoupler (MCT2E)through inverter and then the collector of opto coupler to input of ULN2003.
Robotics and Automatics Forum :: 24.02.2008 13:53 :: Kinjalti25 :: Replies: 6 :: Views: 7770
Hi,
There is quite a lot on this topic in the PC Programming and interfacing section of this board headed as a C++ Question by Licifre, in my post here is a listing of how to drive a 4 phase stepper motor from the parallel port of a PC, it would only require minor mods to the state machine logic to drive a 5 phase device. The parallel port actual
Hobby Circuits and Small Projects Problems :: 20.06.2008 01:02 :: DrBob13 :: Replies: 43 :: Views: 8922
I am wondering about that small oscillation too. Is there a website that you can recommend when it comes to interfacing the circuit with the PC through a USB cable and the use of ADC? By the way since all ECG signal has some negative peaks ... how should I do my ADC?
In addition to that I was told that I could use a comparator and after getting
Hobby Circuits and Small Projects Problems :: 01.08.2008 16:19 :: aredhel :: Replies: 119 :: Views: 20020
Hi...
Im in a project where i hv to interface a finger print sensor and GSM module with 8051 controller. Can anyone gv me an idea hw to do the interfacing of both of these things simultaneously? Im using finger print sensor-FIM3030N. indivually im able to do the interfacing bt i want to do both simultaneously. When a unrecognized finger is detecte
Microcontrollers :: 11.11.2008 07:41 :: engg.embedded :: Replies: 22 :: Views: 5524
Posted: Mon Nov 17 2008, 05:33PM
Hello,
I have Successfully Operate to ON/OFF 220V AC Devices with 8051,ULN2803 and Relay.
My Question is that ...
Is there a Need of interfacing Opto-coupler for operating 220 AV Devices?
Suggest me any Opto coupler IC No.
any other Advantage of Opto-coupler..
Gurpreet Singh
Microcontrollers :: 17.11.2008 13:01 :: gurpreet312 :: Replies: 2 :: Views: 1891
See AN521 interfacing to AC power lines
and
TB3013 Using the ESD Parasitic Diodes on Mixed Signal Microcontrollers
Analog Circuit Design :: 19.02.2009 16:22 :: max0412 :: Replies: 9 :: Views: 970
Hi,
I didn't see the earlier post. Guess I missed it.
Check this for tutorial:
For interfacing to LCD, look under the help menu in the LCD part. Details are given there.
Say, if you have a variable that stores the value of the duty cycle(255 for 100%, 0 for 0%, 128 for 50%), this is in 8-
Microcontrollers :: 26.02.2010 06:02 :: Tahmid :: Replies: 24 :: Views: 5567
Hii guys,
Need your help and suggestion
First I'm making Project for controling Speed of AC Motor using Visual Basic 6.0 and
AVR, I use bascom avr or codevision avr as my compiler. I don't have problem with
interfacing microcontroller to PC.
For controlling speed of the motor I used MOC3021 and TRIAC for Drive the motor.
I wan
Microcontrollers :: 04.02.2010 13:24 :: the_balistic :: Replies: 9 :: Views: 8183
salam to all. i need your help regarding interfacing 6 pin optocoupler with 8051 this optocoupler is further conneted to powermosfet?
the question is i am using hex power mosfet to form 3 phase inverter so i am using ir2102 gate derive ic it has 8 pins but i dnt understand 8th and 6th pin how it is used?
also tell me 2 and 3 pin here 2 of (...)
Microcontrollers :: 03.12.2011 15:18 :: hafizahmad :: Replies: 10 :: Views: 1511
For my final year project i wish to design something that incorporates the following things.
1. 5 devices can be turned ON/OFF using the wall switch (230v AC input).
2. the same 5 devices can also be turned ON/OFF using relays interfaced to a micro controller.
The same micro controller should also be able to detect if a device has been turne
Microcontrollers :: 28.02.2011 09:23 :: 2bengg :: Replies: 9 :: Views: 314
Microchip's document "interfacing to AC Power Lines" showed a series 5M ohm resistor from 120v AC power line to PIC External Interrupt port. Peak current calculation-
Ipeak = 162V/5 M Ω = 32 ?A
This 32 ?A current has been said as a safety margin of the PIC16C5X. But I want to know why such extremely low current is used here. Max current
Microcontrollers :: 19.01.2012 19:41 :: sam781 :: Replies: 136 :: Views: 8551
Hi,
Yes, I recommend series controller with PWM. I haven't found any complete document with circuits and stuff with PWM and microcontroller. I'm developing mine on info I'm getting from various sources. For PC interfacing, it should be easy if you use RS232. If you use USB, it's more user-friendly but it gets tougher for you as the developer. I thi
Microcontrollers :: 23.07.2011 18:27 :: Tahmid :: Replies: 16 :: Views: 2029
What are the hardware precaution to be taken for interfacing a PC serial port (rs232) with a microcontroller ? , is there a need for using an optocoupler for isolating the micro from the serial line ?
PC Programming and Interfacing :: 29.09.2011 13:53 :: varunme :: Replies: 7 :: Views: 554
See how to interface with mc : Microcontroller interfacing
The general idea is like this:- (see above link to
Hobby Circuits and Small Projects Problems :: 16.12.2011 07:55 :: papunblg :: Replies: 39 :: Views: 3817
hello
amplitude (level) of the signal could be very low if the speed is low. Amplitude=f(frequency)
Maybe you have to amplifie by 10 or 100 the signal before to use a trigger to get square vave.
Some industrial inductive sensor can deliver a ON:Off status in front of teehs of gear
I use it for my appart's bike.
Even with an hall effect sensor
Microcontrollers :: 30.03.2012 20:25 :: paulfjujo :: Replies: 1 :: Views: 741
Thanks Adnan Merter i tried CD4010 Buffered IC for that work and its working on the parallel port with an interfacing card having 7812 and 7805 regulators for the power source and only ground matched with the parallel port. What do u suggest is there a better option or Opto Isolation is more better.
Analog Circuit Design :: 14.05.2012 22:18 :: Syed Sarfraz Ali Rizvi :: Replies: 3 :: Views: 232
Good choice. Zigbee would be perfect, and you can poll at any time for the status.
You may need some microcontroller knowledge to use this however (I'm only familiar
with the Jennic modules - maybe there are some that require less 'interfacing'?).
Digital Signal Processing :: 28.05.2012 11:50 :: sky_123 :: Replies: 28 :: Views: 520
The following appnotes discusses a similar technique for the implementation of a zero crossing circuit:
PICDIM Lamp Dimmer for the PIC12C508
interfacing to AC Power Lines
Although it should be mentio
Microcontrollers :: 08.06.2012 10:14 :: bigdogguru :: Replies: 6 :: Views: 387
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