lei29
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« on: October 08, 2008, 01:17:30 AM » |
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is there any rain sensor existing?...
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The Philippine Electronics and Technology Forum
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« on: October 08, 2008, 01:17:30 AM » |
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mArKhAo
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point and shoot
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« Reply #1 on: October 08, 2008, 01:26:13 AM » |
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hmmm... search mo po ung AWMS ng UPd....
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cut my heart out, for a souvenir....
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Ate Shey
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« Reply #2 on: October 08, 2008, 07:46:45 AM » |
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is there any rain sensor existing?...
do you mean "rain gauge" yung nag-mi-measure ng amount of rainfall or something that tells you kung umuulan na? .. |
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- Oh Lordy, troubles so hard. Don't nobody know my troubles but God
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defcon1
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« Reply #3 on: October 08, 2008, 07:59:04 AM » |
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merom rain guage! this one installed in mt. banahaw (2003)  |
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lei29
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« Reply #4 on: October 08, 2008, 08:18:50 AM » |
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rain sensor na pwd i install sa automobile for powered window...
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SpongeBob
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« Reply #5 on: October 08, 2008, 08:22:02 AM » |
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kung sensor pwede na yun pcb na nakaetch parang suklay kabilaan
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lei29
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« Reply #6 on: October 08, 2008, 08:25:06 AM » |
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d ko poh mavisualize... anung meron dun n pwede makadetect as rain sensor?
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defcon1
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« Reply #7 on: October 08, 2008, 08:50:50 AM » |
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baka naman water sensor kailangan mo!  |
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maldihtah13
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« Reply #8 on: October 08, 2008, 01:01:17 PM » |
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Dalawa ang most common rain sensor na ginagamit.
1st - water resistance - may two conductor na nagmemeasure ng resistance inbetween ngaun if may water sa pag-itan tataas ang resistance.
2nd - optical - may ir emmiter ka at ir reciever na nakatutok sa windshield. kung wla rain maganda ang reflection ng IR pero if meron refracted ang IR kya konti lang marerecieve.
Simple lang un una at di mo na kailangan ng MCU. 555 timer lang ginamit ko.
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lei29
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« Reply #9 on: October 08, 2008, 10:36:10 PM » |
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panu poh ba ang setup or construction ang una?... using water resistance?
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maldihtah13
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« Reply #10 on: October 09, 2008, 11:38:22 AM » |
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panu poh ba ang setup or construction ang una?... using water resistance?
PCB lang ginamit ko. Isipin mo dalawang suklay na magkaharapan. ung isang suklay connected sa isang terminal tapos ung isa sa isa. Alternate ang conductor kya kung may water in between tataas ang resistance. |
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Pads
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« Reply #11 on: October 09, 2008, 02:50:08 PM » |
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PCB lang ginamit ko. Isipin mo dalawang suklay na magkaharapan. ung isang suklay connected sa isang terminal tapos ung isa sa isa. Alternate ang conductor kya kung may water in between tataas ang resistance.
Kaso very inefficient ito. Magcocorrode yung anode in time. Pero pwede ring gawing replaceable yung anode. Palitan na lang pag nagcorrode na. |
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lei29
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« Reply #12 on: October 09, 2008, 03:31:44 PM » |
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i got the idea. pero anu po b ang materials n ginagamit dun s dalawang suklay?..
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SpongeBob
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« Reply #13 on: October 09, 2008, 04:55:50 PM » |
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i got the idea. pero anu po b ang materials n ginagamit dun s dalawang suklay?..
sabi nga ni sir nomad nakaetch sa pcb parang dalawang suklay naka interlace, yan ang magiging probe, kapag may resistance in between mag cocontact sya, gumamit ka ng op amp as amplifier para super sensitive para kahit talsik ng laway madedetect |
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58543266
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« Reply #14 on: October 09, 2008, 06:30:30 PM » |
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panu po ba gawin yan??? ehehehe suklay??  |
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Pads
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« Reply #15 on: October 09, 2008, 08:52:47 PM » |
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Here's your suklay:  Mag-etch ng ganyan sa PCB, one suklay connected to the positive; the other suklay to the negative. Pag napatakan ng tubig, the PCB shorts out & it will work as a closed switch (provided na dadaloy ang kuryente dun sa tubig). |
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maldihtah13
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« Reply #16 on: October 13, 2008, 11:45:23 AM » |
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Kaso very inefficient ito. Magcocorrode yung anode in time.
Pero pwede ring gawing replaceable yung anode. Palitan na lang pag nagcorrode na.
Yes magcocorode talaga cya kya mas mainam kung tin coated sya. |
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Pads
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« Reply #17 on: October 13, 2008, 08:27:01 PM » |
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Yes magcocorode talaga cya kya mas mainam kung tin coated sya.
I'm not familiar with tin coating. Hindi ba mababawasan ang conductivity kasi hindi naman kasing conductive ng copper ang tin? Parang kung ulan kasi ang usapan, you'll need the most conductive material available, syepre yung kaya ng budget kaya tanggalin na sa usapan ang silver, kasi hindi naman gaanong conductive ang tubig. Yung demo nga namin about our rain sensor, dinugas ko na lang eh. Nilagyan ko ng asin yung tubig na binubuhos namin sa sensor para todo conduct sya.  |
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1110000
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« Reply #18 on: October 13, 2008, 10:12:11 PM » |
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I'm not familiar with tin coating. Hindi ba mababawasan ang conductivity kasi hindi naman kasing conductive ng copper ang tin? Parang kung ulan kasi ang usapan, you'll need the most conductive material available, syepre yung kaya ng budget kaya tanggalin na sa usapan ang silver, kasi hindi naman gaanong conductive ang tubig. Yung demo nga namin about our rain sensor, dinugas ko na lang eh. Nilagyan ko ng asin yung tubig na binubuhos namin sa sensor para todo conduct sya. heheheheh meron nabibiling copper clad board ngayon na silver plated na dito samen meron hehehehehehe mas mabilis lang masira yung ferric chloride  hehehe PCB lang ginamit ko. Isipin mo dalawang suklay na magkaharapan. ung isang suklay connected sa isang terminal tapos ung isa sa isa. Alternate ang conductor kya kung may water in between tataas ang resistance.
actually baliktad po ang nangyayari pag walang tubig high resistance pag nagkaroon ng tubig bababa ang resistance  |
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maldihtah13
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« Reply #19 on: October 13, 2008, 10:36:38 PM » |
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actually baliktad po ang nangyayari pag walang tubig high resistance pag nagkaroon ng tubig bababa ang resistance tama ka bata salamat sa pag-tatama. |
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The Philippine Electronics and Technology Forum
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April 16, 2008, 09:32:11 PM
MOVED: help about rain sensor
