IR lighting control

[rdmwc]

hey guys, im trying to build a project but cant seem to figure out the electronics part. i need to build a circuit so that when an object passes a certain point, it shut off a couple leds and flash other leds for a couple seconds and then turn the original leds back on. i was thinking about using an IR beam sensor. could anyone help me out? i know a bit about electronics and components, but to put it all together is

 

[rdmwc]

nobody has any ideas?

 

[ericgibbs]

nobody has any ideas?

hi,

Over what distance will the TX to RX beam cover.?

 

[rdmwc]

Hi Eric, thank you for your response. it will be below a 6inch hole. i need it to trigger if anything passes through the 6inch hole. so up to about 10inches depending on mounting of the sensors.

 

[ericgibbs]

Hi Eric, thank you for your response. it will be below a 6inch hole. i need it to trigger if anything passes through the 6inch hole. so up to about 10inches depending on mounting of the sensors.

hi,
A IR emitter diode and detector will work over a 10 inch range.

You can also buy TSOP dedicated TX and RX modules

Look at this link:

Infrared Emitters | Farnell United Kingdom

 

[rdmwc]

yes, i was looking at a vishay component that had the emitter and reciever all in one. it would be a passive system working off of reflected ir. i dont know the range on it though. i need some help with the rest of the circuit though. i know i can use a transister to flash the leds, or use a 555 timer circuit, but i have no idea what cicuitry i will need for the ir components and how to get it to shut off the leds for a time so the others can flash for a few seconds and then turn the other ones on again.

 

[ericgibbs]

yes, i was looking at a vishay component that had the emitter and reciever all in one. it would be a passive system working off of reflected ir. i dont know the range on it though. i need some help with the rest of the circuit though. i know i can use a transister to flash the leds, or use a 555 timer circuit, but i have no idea what cicuitry i will need for the ir components and how to get it to shut off the leds for a time so the others can flash for a few seconds and then turn the other ones on again.

hi,
You need to specify the leds, the sequencing and the power supply before we can suggest a circuit.

 

[rdmwc]

lol, thank you eric, it looks like i left out valuable information. well, the leds that will be on before and after the flashing takes place will be between 1 and 4 leds. they will either be red, blue, white, or green. ( i believe if i stick with about 3v @ .20ma it will be fine for all) As far as the flashing leds go, if i were to be able to make the previously stated leds flash for a few seconds when triggered by the ir sensor. then the leds go back constant. if not, then i would use more of the above stated leds as the flashing leds, whichever would be easier. as far as the flash rate, one or 2 times per second. the power supply would be either 6 or 9volt battery pack. if you need more specific information, please let me know and i will post it. thank you again!

 

[rdmwc]

ok, i have a little more specifics. it will be one led. i need it to be on constant, then when the IR sensor is triggered, that led will flash for 3 to 5 seconds. then it will go back on constant. i will be using a 9volt dc source. any help is much appreciated!! thanks.