Infrared Photodiode Sensor Circuits - Electronic Circuits Projects Diagrams Free

Leon.h · 20th April 2004, 11:53 AM

Hello,

I was wondering if anyone of the experts can give me advice on the above.

I need to trigger a counter when a beam of IR light is cut, using a photodiode & phototransistor. The timer circuit is done, I would appreciate any help.

Thanks.

Russlk · 20th April 2004, 08:52 PM

You need an IR receiver, such as this: http://www.vishay.com/ir-receiver-modules/

Leon.h · 21st April 2004, 02:12 PM

Got all the components, using a NE555 timer, IR LED's, IR phototransistor etc but its the actual wiring up of the system I am unsure of.

As the beam of light is cut, I want the red LED I am using in the detector, to go out & trigger a timing device, how exactly would I go about this?

Russlk · 21st April 2004, 05:25 PM

Try this:

daviddoria · 21st April 2004, 10:07 PM

russlk, with the voltage divider like that on pins 6 and 7 isn't that astable mode? wouldn't he want monostable and pin 3 (output) connected to the 7-seg display controller?

i could be wrong...

Russlk · 21st April 2004, 11:04 PM

No, I did not show the output connection. Astable mode is when pin 2 and 6 are connected. The pulse width is very short when pin6 and 7 are connected, this arrangement widens the pulse width.

daviddoria · 22nd April 2004, 12:21 AM

ahh yes 2 and 6 are indeed not connected

what do you mean the pulse width?

Russlk · 22nd April 2004, 02:57 AM

Good question, I was confused; should refer to the data sheet more often.

alvin_lee · 22nd April 2004, 08:00 AM

Hi everyone,
I have a problem here. I am currently working on a project. It requires me to transmit data from one end to the other using Infra-Red. I've got a 38kHz signal generated using a 555 timer, an IR diode and a receiving module IS1U60. From what i understand, the IS1U60 should allow me to get a High output when theres no signal received and a Low signal where theres a 38kHz waveform. I tried to transmit the 38kHz over to the receiving module but fail to get the desired output as stated. Please help me......its urgent. Thanks

Leon.h · 22nd April 2004, 10:11 AM

Thanks for the assistance guys, much appreciated!

Russlk · 23rd April 2004, 12:05 AM

Alvin-Lee: Here is a quote from another website:
Sharp IS1U60 (available at RS, it seems that this IC draws much more current than the others)
Warning: Some users have reported problems with the IS1U60 receiver. It picks up ambient light and is nearly unusable with fluorescent lamps. If ever possible get a different receiver.

Check this URL for other receivers:
http://www.lirc.org/receivers.html

However, does your circuit work if you get the transmitting LED close enough? Post your circuit if you want more feedback.

Electric Rain · 23rd April 2004, 05:50 AM

Quote:

Originally Posted by Russlk

Alvin-Lee: Here is a quote from another website:
Sharp IS1U60 (available at RS, it seems that this IC draws much more current than the others)
Warning: Some users have reported problems with the IS1U60 receiver. It picks up ambient light and is nearly unusable with fluorescent lamps. If ever possible get a different receiver.

Check this URL for other receivers:
http://www.lirc.org/receivers.html

However, does your circuit work if you get the transmitting LED close enough? Post your circuit if you want more feedback.

Haha! :lol: That's no surprise. RS selling a junk IC. :lol: They're no good anymore. :x

alvin_lee · 23rd April 2004, 12:25 PM

I cant get anything transmitted even if I get the emitter to touch the receiver. The circuit is pretty simple. I attach one leg of the Infra-Red to a 38khz signal generated from a 555 timer. On the receiving end, I power up IS1U60 and attach a probe on the output. I get a constant high which means the receiver is not receiving any signal at all.

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20th April 2004, 11:53 AM	(permalink)
Leon.h	Infrared Photodiode Sensor Circuits Hello, I was wondering if anyone of the experts can give me advice on the above. I need to trigger a counter when a beam of IR light is cut, using a photodiode & phototransistor. The timer circuit is done, I would appreciate any help. Thanks.

20th April 2004, 08:52 PM	(permalink)
Russlk	You need an IR receiver, such as this: http://www.vishay.com/ir-receiver-modules/ __________________ see my website: www.geocities.com/russlk

21st April 2004, 02:12 PM	(permalink)
Leon.h	Cheers Russlk, but....... Got all the components, using a NE555 timer, IR LED's, IR phototransistor etc but its the actual wiring up of the system I am unsure of. As the beam of light is cut, I want the red LED I am using in the detector, to go out & trigger a timing device, how exactly would I go about this?

21st April 2004, 10:07 PM	(permalink)
daviddoria	russlk, with the voltage divider like that on pins 6 and 7 isn't that astable mode? wouldn't he want monostable and pin 3 (output) connected to the 7-seg display controller? i could be wrong... __________________ thanks, david

21st April 2004, 11:04 PM	(permalink)
Russlk	No, I did not show the output connection. Astable mode is when pin 2 and 6 are connected. The pulse width is very short when pin6 and 7 are connected, this arrangement widens the pulse width. __________________ see my website: www.geocities.com/russlk

22nd April 2004, 12:21 AM	(permalink)
daviddoria	ahh yes 2 and 6 are indeed not connected what do you mean the pulse width? __________________ thanks, david

22nd April 2004, 02:57 AM	(permalink)
Russlk	Good question, I was confused; should refer to the data sheet more often. __________________ see my website: www.geocities.com/russlk

22nd April 2004, 08:00 AM	(permalink)
alvin_lee	Need circuit in Tx and Rx data through InfraRed Hi everyone, I have a problem here. I am currently working on a project. It requires me to transmit data from one end to the other using Infra-Red. I've got a 38kHz signal generated using a 555 timer, an IR diode and a receiving module IS1U60. From what i understand, the IS1U60 should allow me to get a High output when theres no signal received and a Low signal where theres a 38kHz waveform. I tried to transmit the 38kHz over to the receiving module but fail to get the desired output as stated. Please help me......its urgent. Thanks

22nd April 2004, 10:11 AM	(permalink)
Leon.h	Thanks! Thanks for the assistance guys, much appreciated!

23rd April 2004, 12:05 AM	(permalink)
Russlk	Alvin-Lee: Here is a quote from another website: Sharp IS1U60 (available at RS, it seems that this IC draws much more current than the others) Warning: Some users have reported problems with the IS1U60 receiver. It picks up ambient light and is nearly unusable with fluorescent lamps. If ever possible get a different receiver. Check this URL for other receivers: http://www.lirc.org/receivers.html However, does your circuit work if you get the transmitting LED close enough? Post your circuit if you want more feedback. __________________ see my website: www.geocities.com/russlk

23rd April 2004, 12:25 PM	(permalink)
alvin_lee	Infra-Red I cant get anything transmitted even if I get the emitter to touch the receiver. The circuit is pretty simple. I attach one leg of the Infra-Red to a 38khz signal generated from a 555 timer. On the receiving end, I power up IS1U60 and attach a probe on the output. I get a constant high which means the receiver is not receiving any signal at all.