Author Topic: patulong po sa smoke sensor project (Read 2297 times)

zzune · « **on:** September 17, 2009, 06:01:01 PM »

idea ko po is gumamit ng phototransistor with led, pahinge naman po ng circuit. wala talaga akong idea kung pano gagawin

is pa po is heat detector... may circuit po ba kaung alam para sa ganitong sensor?

Philippine Electronics Forum · « **on:** September 17, 2009, 06:01:01 PM »

zzune · « **Reply #1 on:** September 17, 2009, 08:01:09 PM »

mejo magulo ata ung pagasabi ko nung una

ang need ko po sana kung pano po mag act as a switch ung phototransistor at thermistor...ung simple lng po, ung phototransistor mejo may idea na ako kasi transitor cya, pero ung thermistor wla akong maisip na circuit para gawin siyang switch na magdedetect ng heat

Philippine Electronics Forum · « **Reply #1 on:** September 17, 2009, 08:01:09 PM »

SpongeBob · « **Reply #2 on:** September 17, 2009, 08:06:44 PM »

Yun phototransistor tumataas ang collector to emitter current proportional to light received, yun namang thermistor tumataas ang resistance kapag mataas ang temperature.

Philippine Electronics Forum · « **Reply #2 on:** September 17, 2009, 08:06:44 PM »

zzune · « **Reply #3 on:** September 18, 2009, 12:38:16 PM »

thanks sa info

tanong ko lng po kung ano ung nasa tabi ng diode sa pic na to

http://1.bp.blogspot.com/_zLj1Mx-ENMA/SqNn1igBteI/AAAAAAAAAUY/6M0Wd2hfQpk/s400/Untitled-1.jpg

Philippine Electronics Forum · « **Reply #3 on:** September 18, 2009, 12:38:16 PM »

insomartin · « **Reply #4 on:** September 18, 2009, 01:19:03 PM »

^ relay.
get a good basic electronics e-books. ok yung evil genius series kung konti pa yung alam mo sa electronics. madaming sample circuits dun.

Philippine Electronics Forum · « **Reply #4 on:** September 18, 2009, 01:19:03 PM »

-albert- · « **Reply #5 on:** October 07, 2009, 12:19:18 PM »

tama po ba ung pag connect ko?

d ko kasi ma simulate dahil walang phototransistors sa workbench ko...copy paste lng ung circuits

plano ko kasi pag na block ung ilaw sa isang sensor mag on ung LED ( yung box sa output ng or gate) ...simple lng na smoke detector with logic gates

Mayalin22 · « **Reply #6 on:** October 07, 2009, 10:21:45 PM »

ito adjustable ang trigger

carlsfootprints · « **Reply #7 on:** October 07, 2009, 11:28:44 PM »

@zzune,

kapag bibili ka na ng thermistor mo, get the highest ohm rating na meron.. nung gumamit kasi ako nun ng thermistor, hindi naaactivate agad.. perhaps may mali ako sa computation ng voltage divider pero gumana kasi nung malaki ma ung ohm

ultrasonic™ · « **Reply #8 on:** October 08, 2009, 01:19:17 AM »

subukan nyu ito:

HEAT DETECTOR subok ko na kasi noon pa

TDR = 5k ohm NTC thermistor
R2 = 50k ohm trim..
Q1 = 2N3904 / 2N2222A
K1 = SPDT relay 6V

adjust lng kayo sa trimmer to improved der sensitivity

(^_^)

insomartin · « **Reply #9 on:** October 08, 2009, 01:34:19 AM »

PIR Sensor nang egizmo. i lit a lighter nag on! yun nga lang... kapag may sudden movement nagtritriger din. but sensitive sya sa ir.

carlsfootprints · « **Reply #10 on:** October 15, 2009, 01:23:01 AM »

^

sir martin, may working schematic po ba kayo for the PIR sensor ng egizmo? TIA

insomartin · « **Reply #11 on:** October 15, 2009, 02:01:21 AM »

^ meron.

carlsfootprints · « **Reply #12 on:** October 15, 2009, 02:03:27 AM »

ok lang po ba pashare? hehehe

insomartin · « **Reply #13 on:** October 15, 2009, 02:45:45 AM »

(of course i PM mo ako diba?!)

ultrasonic™ · « **Reply #14 on:** October 17, 2009, 01:53:19 AM »

Quote from: Martin on October 15, 2009, 02:45:45 AM

(of course i PM mo ako diba?!)

pwde maki-ambag din (^_^)

carlsfootprints · « **Reply #15 on:** October 18, 2009, 10:07:40 AM »

PM sent sir Martin

Philippine Electronics Forum · « **Reply #15 on:** October 18, 2009, 10:07:40 AM »

Author Topic: patulong po sa smoke sensor project (Read 2297 times)

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