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DIY Motosikal Forum Index -> Elektrik/Elektronik

Guna LED sebagai lampu isyarat
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xpthrone
Pomen D.I.Y


Joined: 18 Jan 2007
Posts: 149
Location: gopeng, perak

kalau dah siap depan blakang, bleh tambah variable resistor...

test sampai brape ohm baru die berkelip... lepas tu baru tambah perintang...

slalu nye di panggil load resistor...

Post Fri Feb 09, 2007 3:43 pm 
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racingnerd



Joined: 20 Jan 2007
Posts: 47

quote:
Originally posted by xpthrone:
quote:
Originally posted by racingnerd:
saya perlukan bantuan. Embarassed

saya sambungkan sebijik perintang 1k kepada sebijik led10 mm. lepas tu sambung pulak wayar positive untuk signal tu dan negatifnya macam biasa.

lampu hidup, tapi tak kelip. macamana nak buat ye?


LED tak berkelip sebab tak cukup watt... cube tengok kat signal relay...

biase nye ade tulis bape watt...

kalau mentol biase 5 watt, LED tu mungkin tak sampai 1 watt...

care nak bagi berkelip, kene la same kan watt ngan mentol asal...

atau pon, cari signal relay elektronik yang watt kecik...


oh..macam tu rupanya. nak bg sama watt tambah perintang je boleh ke?

saya pun cam bro camar jugak, hampeh pasal kira2 ni.

Post Fri Feb 09, 2007 9:43 pm 
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milo
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Joined: 18 Jan 2007
Posts: 92
Location: Utara

hmm aku teringin sangat nak bantu korang..
projek LED signal aku version-2 dah berjaya..

racingnerd : aku rase, maybe relay signal moto ko tu, takleh nak 'drive'
LED 10mm tu ke tahap lebih terang.. tapikan aku rase LED ni tak makan
banyak Watt..

camar : sblm letak kat moto, cube check connection tu kat Batt 12V dulu.
mane tau tertukar +ve / -ve. sbb LED ni sambungan polarity kene betul.

info : kekadang akan terjadi satu fenomena yg aku tatau nak ckp mcm
mane.. fenomena tu akan menyebabkan +ve signal korang berubah
'jantina' menjadi -ve sekejap sblm lampu signal di-ON kan.

nak elak perkara ni terjadi, korang taruk la satu DIOD 4001. supaya
arus tak mengalir berlawanan arah.

atau, maybe ade +ve yang terkena kat body so, lampu tak nyala /
tak kelip.
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Post Sat Feb 10, 2007 9:43 pm 
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racingnerd



Joined: 20 Jan 2007
Posts: 47

bro tgh memberi bantuan le ni, jasamu dikenang Very Happy

lagi satu yg saya perasan, diagram yg bro post semua sambung perintang kat kaki negatif, saya sambung kat kaki positif.

ada beza ke tu?

Post Sat Feb 10, 2007 10:39 pm 
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milo
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Joined: 18 Jan 2007
Posts: 92
Location: Utara

perintang tu.. takde beza. tu yg aku experimen la.
letak kat -ve atau +ve ok je. tapi aku suke letak kat +ve..
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Post Sat Feb 10, 2007 11:54 pm 
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racingnerd



Joined: 20 Jan 2007
Posts: 47

oh, ok Very Happy

quote:
Originally posted by milo:
racingnerd : aku rase, maybe relay signal moto ko tu, takleh nak 'drive'
LED 10mm tu ke tahap lebih terang.. tapikan aku rase LED ni tak makan
banyak Watt..




jadi apa solution prob ni? tambah perintang?

Post Sun Feb 11, 2007 12:14 am 
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milo
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Joined: 18 Jan 2007
Posts: 92
Location: Utara

okeh.. utk kes racingnerd ni:-

aku assume ko ade 12volt, LED 10mm 3volt.
jadi, aku rase, kalo ko gune resistor 1K = 1000Ohm,
LED 10mm tu hanya akan di 'drive' sebanyak 10mA shj..
kirenye.. 10mA ni malap je.


===================================================

cube ko pakai resistor 150 Ohm, 1Watt.
ko akan drive LED ni sampai 60mA. so, terang la LED ko
tu. make sure 1W resistor.. (saiz fizikal lagi besar dari 1/4W nye)


p/s: 10mA ni aku buat utk Running Light (SSH) aku, meanwhile
aku guna around 60~70 mA utk Signal aku.
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Post Sun Feb 11, 2007 12:42 am 
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racingnerd



Joined: 20 Jan 2007
Posts: 47

encik milo memang minuman tenaga! terima kasih banyak. Very Happy

saya sudah paham sikit. sebelum ni relay tak fungsi sebab watt terlalu rendah, jadi macam ni, watt tinggi sikit, relay akan fungsi balik.

gitu ye?

jadi kalau drive kan led tu 1A, lagi terang lah? atau blow?

Post Sun Feb 11, 2007 2:41 am 
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milo
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Joined: 18 Jan 2007
Posts: 92
Location: Utara

err.. relay tak fungsi kalo takde volt..
aku rase la, relay ko tu fungsi.. cume ko taruk resistor tinggi
sangat kot. aku rase la.. maybe encik harimau leh tolong..

kalo resistor tu rendah sikit, baru terang LED tu.

JANGAN drive LED anda 1amp.. meletup. boleh masuk mata woo..
aku dah try.. hahahah..

LED max aku rase dalam 0.07Amp je.. @ 70 miliAmpere.

p/s: cube tanye kedai, kadang2 LED yg diorang jual ni ade spec sheet.
mintak spec sheet tu.. ade tulis brape volt, brape milicandela (kecerahan)
bagi setiap mA..
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Post Sun Feb 11, 2007 5:05 pm 
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racingnerd



Joined: 20 Jan 2007
Posts: 47

ohoo..tenkiu! Very Happy

memang betul lah mendalami ilmu ni macam masuk laut, makin dalam kita masuk, makin banyak kita tak tau. Laughing ha ha ha

oh gitu, ok. lepas ni beli perintang, test lagi. kalau jadi, saya post gambau, tak jadi, saya tanya lagi Very Happy ha ha

Post Sun Feb 11, 2007 5:21 pm 
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