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Author Topic: help nmn po about Infrared as a switch..  (Read 10543 times)

Offline hectorskie---

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help nmn po about Infrared as a switch..
« on: August 19, 2008, 04:10:24 PM »
meron po ba d2 may alam kung panu po gawin switch ung infrared?? ung tipong pag naputol ung light nung infra saka mag ON ung circuits??  ??? mayroon po kayang schematic un?? tnx!
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help nmn po about Infrared as a switch..
« on: August 19, 2008, 04:10:24 PM »

Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #1 on: August 19, 2008, 04:49:26 PM »
opo.. kailangan ko din po un ung infrared as a switch s iniicp kong parking lot system.. thank you po!

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Re: help nmn po about Infrared as a switch..
« Reply #1 on: August 19, 2008, 04:49:26 PM »

Offline mArKhAo

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Re: help nmn po about Infrared as a switch..
« Reply #2 on: August 19, 2008, 05:43:07 PM »
hehe, madali lng po yan.. search nyu si google.
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Re: help nmn po about Infrared as a switch..
« Reply #2 on: August 19, 2008, 05:43:07 PM »

Offline 0b00000111

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Re: help nmn po about Infrared as a switch..
« Reply #3 on: August 19, 2008, 06:13:19 PM »
yung kinuha kong detector para sa IR is galing sa remote control receiver ng isang sirang DVD player ;D ;D ;D ;D ;D
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Re: help nmn po about Infrared as a switch..
« Reply #3 on: August 19, 2008, 06:13:19 PM »

Offline kinyo

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Re: help nmn po about Infrared as a switch..
« Reply #4 on: August 19, 2008, 08:13:10 PM »
madami nga info nito sa net ... dito ko rin nakuha ang info nung gumawa ako ng infrared remote control extender

yung mga receiver na ginagamit ng mga devices, meron na silang built-in na 38kHz filter kasi yung transmitter sa remore control ay 38kHz ang base frequency

meron sa alexan both transmitter at receiver ... the transmitter is plain inrared diode, while the receiver is a 3-terminal device (5V,gnd, & Vout)

you may, of course, opt to use the basic infrared photodiode/phototransistor as reciever

howwever, i think it is better to use the infrared receiver module with built-in filter so that you would not have to worry about false triggering, and just need usual 5V supply ... the transmitter can be easily built with 555 timer ic to provide the 38kHz drive ... when the 38kHz infrared beam is interrupted, the output of the receiver will be 0 volt logic level

good luck  ;D

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Re: help nmn po about Infrared as a switch..
« Reply #4 on: August 19, 2008, 08:13:10 PM »

Offline underprezzure

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Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #6 on: September 16, 2008, 05:33:31 PM »
hi po!!

ask ko lng po bout infrared emitting diode.. or the photodiode..

pnu po b xa magagamit as switch for the 74ls190.. gagawa po kasi kme ng counter..

Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #7 on: September 16, 2008, 05:38:19 PM »
gnito po kasi un.. may 7segment display.. tas 74ls47  n driver, then connected po sa 74ls190 decade counter.. gagawin po hanggang 10 lng ang count.. and then every pass dun sa ir diode eh mag increment sa 7 segment n display..

san ko po kaya icoconect un IR n un? nun ginawa po kasi nmin,, random po ang labas nya sa 7segment.. hindi po un increment lng ng by 1..  ???

Offline 0b00000111

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Re: help nmn po about Infrared as a switch..
« Reply #8 on: September 16, 2008, 05:54:06 PM »
gnito po kasi un.. may 7segment display.. tas 74ls47  n driver, then connected po sa 74ls190 decade counter.. gagawin po hanggang 10 lng ang count.. and then every pass dun sa ir diode eh mag increment sa 7 segment n display..

san ko po kaya icoconect un IR n un? nun ginawa po kasi nmin,, random po ang labas nya sa 7segment.. hindi po un increment lng ng by 1..  ???

tie nyo sa ground ang pin 4 at 5. yung PL lagyan nyo ng pull-up resistor (10K) plus switch para magserve as reset...

tapos sa input nyo sa pin14 clk. lagyan nyo muna ng switch tapos pull-up(10K) + capacitor for debounce muna. pag napagana nyo na, doon nyo na ipasok ang IR ckt nyo...
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Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #9 on: September 16, 2008, 06:04:46 PM »
ah thanks po, try ko po maya sa bhy pag uwe ko..

so, un po b ung RC circuit? sbe po kasi dpt may filter bgo ang IR circuit??

Offline 0b00000111

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Re: help nmn po about Infrared as a switch..
« Reply #10 on: September 16, 2008, 06:13:09 PM »
yung capacitor is para lang sa bounce ng mechanical switch. pero kung IR tapos phototransistor, pwede na pull-up resistor na lang...
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Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #11 on: September 16, 2008, 06:16:43 PM »
yung capacitor is para lang sa bounce ng mechanical switch. pero kung IR tapos phototransistor, pwede na pull-up resistor na lang...

ah ok po.. thank you po..

so gnun po un kpg increment..

pnu nmn po ung pag decrement nun?? same p din po b?

Offline 0b00000111

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Re: help nmn po about Infrared as a switch..
« Reply #12 on: September 16, 2008, 06:27:18 PM »
naka high yung pin5 pag decrement... nasa datasheet ang truth table :) :)
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Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #13 on: September 16, 2008, 06:30:00 PM »
opo. hehe.. kita ko nga po un..

ah, dun p din po b sa same n IR ang daan para magdecrement or hiwalay po ang circuit nun? i mean, 1 para sa entry then another for the exit??  ???

Offline 0b00000111

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Re: help nmn po about Infrared as a switch..
« Reply #14 on: September 16, 2008, 07:17:31 PM »
pwede din doon dumaan para magdecrement. lagay na lang ng switch doon sa pagtoggle ng U/D
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Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #15 on: September 17, 2008, 09:00:17 AM »
ok po.. thanks po.. hehehe... pero hindi ko p po napagana kgbe eh..  ???

bka po mali mga ngawa kong connection..   ;)

Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #16 on: September 17, 2008, 09:06:06 AM »
tsaka po. do i have to connect the photo transistor sa isang 74LS04 (inverter) ?? kasi po un ang pinakita smin ng prof eh.. ang + nun phototransistor sa pin1 ng 74LS04, then pin2 is connected to pin3.. then ung sa pin4 ang output papuntang 74LS190??

Offline maldihtah13

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Re: help nmn po about Infrared as a switch..
« Reply #17 on: September 17, 2008, 11:49:15 AM »
usually ang ginagawa ko eh may nakaseries na 10k sa between the power supply (usually 5V) at collector ng phototransistor tapos ung emitter sa ground. tapos ang output eh sa collector pin ng phototransistor. if wla ir present near to 5v ang output, then if IR is present near to ground ang output. To invert the logic I use an inverter.

Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #18 on: September 17, 2008, 01:40:39 PM »
ah ok po..un nga po ang gagamitin eh. ung IR emitting diode.. ahm.. wer ko po connect un output nun sa inverter n pin4 sa 74LS190?? dun po b sa pin14??

may mbibigay po b kau sample schematic bout counters using 74LS190 and IR diodes??

Thanks po! un n lng po kasi ang dapat ausin nmin sa project eh..

thank you po!

Offline Lenjei

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Re: help nmn po about Infrared as a switch..
« Reply #19 on: September 17, 2008, 02:07:39 PM »
pls nmn po oh. un phototransistor n lng..

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Re: help nmn po about Infrared as a switch..
« Reply #19 on: September 17, 2008, 02:07:39 PM »

 

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