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Author Topic: LED Strobe for mechanical Movement  (Read 7869 times)

Offline marcelino

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Re: LED Strobe for mechanical Movement
« Reply #60 on: July 22, 2009, 09:34:46 PM »
Quote from: Tolits on July 21, 2009, 01:43:42 PM
Here is the Flash Rate Max (FPM) of our stroboscope for reference

http://www.maintsys.com.au/images/products/measure-test/brochures/Checkline%20Strobes.pdf

hmm...

2-12500FPM, flash per minute ba?

mababa lang pala...
12500/60 ~208flash per second or like 200 Hz lang.

i am actually designing my own strobescope using CCP ng PIC. overkill na pala yung at pangit ng design ko. 100,200,300...1000 yung ginagawa kong presets. ;D
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Re: LED Strobe for mechanical Movement
« Reply #60 on: July 22, 2009, 09:34:46 PM »

Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #61 on: July 22, 2009, 10:16:50 PM »
sis,
pwde ka naman gumamit adc input(pot vary)  para mavary mo freq...fixxed 5% duty cycle...
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Re: LED Strobe for mechanical Movement
« Reply #61 on: July 22, 2009, 10:16:50 PM »

Offline marcelino

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Re: LED Strobe for mechanical Movement
« Reply #62 on: July 22, 2009, 10:43:13 PM »
Quote from: RaffT on July 22, 2009, 10:16:50 PM
sis,
pwde ka naman gumamit adc input(pot vary)  para mavary mo freq...fixxed 5% duty cycle...

yeah... was thinking bout that. gagamitin ko pa nga yung digital potentiometer, i2c ang interface. pero sa ngayon, iniinsist ko munang magawa sa pic16F628. kapag ok na, madali naman lumipat. medyo may mangilan-ngilan pa kasi ako nito. konti nalang yung may mga adc. at nasasayang ako sa number of pins. 28 pins ang pinakamaliit ko nang may adc eh. anyways, just doing it to learn. experiment kung baga.
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Re: LED Strobe for mechanical Movement
« Reply #62 on: July 22, 2009, 10:43:13 PM »

Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #63 on: July 23, 2009, 08:42:10 AM »
hhmmmm pwede naman ADC 10bit(1023) then yung value eh i-KABIT sa freq gen.. then gawa kana rin LCD display to show the freq from the ADC.. hhehehhehe



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Re: LED Strobe for mechanical Movement
« Reply #63 on: July 23, 2009, 08:42:10 AM »

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Re: LED Strobe for mechanical Movement
« Reply #64 on: July 25, 2009, 04:18:15 PM »
....parang tama si Tintophack, nakagamit rin ako ng strobe para sa firing timing ng sasakyan, kung parehas yung strobe freq at water drops freq parang hihinto ito o nakalutang itong tingnan, pagmasmabilis ang strobe freq kaysa water drops freq babaliktad ang direksyon ng  water drops.

yong period lang ng strobe freq ang hindi ako sigurado, dapat ba parehas ang On at Off time ng strobe?!

@Martin****

bat kailangan pa ng multiple flash during On time? para saan ba ito?


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Re: LED Strobe for mechanical Movement
« Reply #64 on: July 25, 2009, 04:18:15 PM »

insomartin

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Re: LED Strobe for mechanical Movement
« Reply #65 on: July 25, 2009, 05:44:12 PM »
^ayun yung pwm para kumain nang extra "mA" short burst lang naman... kasi kapag nasa 1khz medyo dim na, unlike flash bulbs bright pa din.

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Re: LED Strobe for mechanical Movement
« Reply #66 on: July 25, 2009, 07:47:37 PM »
^^^ah okay
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Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #67 on: July 25, 2009, 09:10:52 PM »
EPE July 1999

may simple strobo doon..im making one now... using LF351

current fed to LED is 2A @ 1% duty cycle = 20mA on LED  ;)
fpm range of 17-100 = 1020RPM - 6000RPM
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Re: LED Strobe for mechanical Movement
« Reply #68 on: July 25, 2009, 09:58:55 PM »
@ Rafft

Papano ba mag-compute ng water drops freq?

Sampol:

Nakaset yong dropper ko sa 98 drops/sec tapos yong height ng dropper ay 3 meters high mula sa floor? derekta bang 98 drops/sec ang waterdrop freq ko? o kailangan pang e consider yong heigth at G na 9,8 m/sec-sec para sa freefall ng waterdrops?
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Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #69 on: July 25, 2009, 10:20:51 PM »

 ^ pag mas mataas ang height na bababaan ng drops, mag iiba na ang RATE nun starting from the TOP and the BOTTOM... mas mabilis sa bottom ang speed...

kung maglalagay ng STROBO, i-seset mo siya same freq of drops *at that point* where mo gusto tingnan ang FROZEN image nun...

bakit, 3 meters ba ang total hieght na IILAWAN mo ng strobo? ;D  AYOS yan tingnan pag ganun... out of synchronousITY , lets say yung strobo mo is SET for freq = 1.5Meters from bottom (or sa gitna) yung top will look like SLOW FORWARD movement, the center will FREEZE and the bottom part will look like SLOW BACKWARD movement...
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Re: LED Strobe for mechanical Movement
« Reply #70 on: July 25, 2009, 10:50:00 PM »
ah okay Rafft thanks...

white LED rin lang kasi ang gusto kung gamiting strobo, yong flashlight ng tsina nakabili kasi ako ng 5watts nito, baka okay na ito gawing strobo.

teka, paano dapat ang posisyon ng strobo, naka focus ba siya pababa in-line sa drops o nakatingala sa waterdrops?


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Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #71 on: July 26, 2009, 09:04:07 AM »
^experiment nalang for best viewing angle :)

btw, here is my LED strobo.. naTEST ko na ito using PC PS fan... nasa mga 2Krpm yung FREEZE image nya... FPM(flash per minute range is 17 - 300Hz , im using 220k pot)




eto binaklas ko ang 12Vdc xenon strobe ko(i-reverse ko to para ma-inteface yung trigger part nya) ....
pag OK na, eh gawan nalang ng PIC prog as freq counter to monitor the FPM

like this:
fpm = 17
rpm = 1020 //freq * 60

;)
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Offline kinyo

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Re: LED Strobe for mechanical Movement
« Reply #72 on: July 26, 2009, 04:15:12 PM »
ito kayang LED flashlight ng Maglite pwede kaya gawing stroboscope?



balak ko lang gawin transistor ang switch nya (pwede ko isingit sa pwet nya, negative side ng battery) ... mabilis din kaya yung electronic driver nung ultrabright LED nya? ... pwede kaya 1ms pulse lang?

 ;D
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Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #73 on: July 26, 2009, 04:21:55 PM »
eto yung ginawa ko..prototype nga lamang...

 I interfaced it to a 12V xenon flasher(modified it to have FASTER flashing tapos may input na for pulses)

medyo mahina lang ang output nito(supply for the strobo is @9V only.. baka masira ang maliit na xenon bulb..  :(



replaced the 10uF/400V elcap to 120nF 400V.. for faster charging at the expense of lesser FLASH output


eto naman front.. xenon bulb assembly taken from a discarded camera... buti ito kasi may reflector na




the whole setup.. in my workbench, cluttered ;D


photo taken while unit in operation   NOTE:walang CAMERA FLASH yan...  :)



strobo
and here is the video.. wait nyo nalang.. processing pa...

OK na pala.. hehehe


 ;)
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Offline Mayalin22

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Re: LED Strobe for mechanical Movement
« Reply #74 on: July 26, 2009, 04:22:54 PM »
opss double post  :D :D :D
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Offline Mayalin22

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Re: LED Strobe for mechanical Movement
« Reply #75 on: July 26, 2009, 04:23:49 PM »
@ kinyo
maganda yan ah? makabili nga din he he he  :D

bypass na lang cguro ang driver  para walang sagabal ;)


sir rafft nice!
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Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #76 on: July 26, 2009, 04:24:03 PM »

[/quote]
Quote from: kinyo on July 26, 2009, 04:15:12 PM
ito kayang LED flashlight ng Maglite pwede kaya gawing stroboscope?



balak ko lang gawin transistor ang switch nya (pwede ko isingit sa pwet nya, negative side ng battery) ... mabilis din kaya yung electronic driver nung ultrabright LED nya? ... pwede kaya 1ms pulse lang?

 ;D

pwede mo BUKSAN yan? ;D tingnan ko nga kung 2Watt LED talaga ang nasa loob nyan...
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Re: LED Strobe for mechanical Movement
« Reply #77 on: July 26, 2009, 04:28:43 PM »

ayoss Rafft a!! full stop talaga.... :)
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Offline RaffT

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Re: LED Strobe for mechanical Movement
« Reply #78 on: July 26, 2009, 04:30:44 PM »
^yes :)

 my initial ckt using LED only, also works... pero mas maliit nga lang ang light output nito... :)
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Offline kinyo

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Re: LED Strobe for mechanical Movement
« Reply #79 on: July 26, 2009, 05:17:41 PM »
@Tolits
maganda nga sya ... pasalubong lang sa akin ng mabait na kamag-anak nagbalikbayan, nag-sale daw ito sa States bago sya umalis dun, diko na natanong kung magkano  ;D

@RaffT
eto yung LED nya


maliwanag naman, kinunan ko kanina lang sa mesa with flash, nakasindi ang 20W cfl room light at yung circular fluro sa magnifier pero kita pa rin ang beam nya  ;D


btw 3W talaga ang electrical consumtion nya ... 3V, 1A
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Re: LED Strobe for mechanical Movement
« Reply #79 on: July 26, 2009, 05:17:41 PM »
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