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Author Topic: Bulbs  (Read 2082 times)

Gopher

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Bulbs
« on: October 21, 2016, 05:24:36 PM »

Good evening all, can anyone tell where I might be able to buy some of these? they run on 6v
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ian-mccaffrey

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Re: Bulbs
« Reply #1 on: October 21, 2016, 06:27:17 PM »

they are called grain of wheat / grain of rice bulbs ... ebay will have them

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ian-mccaffrey

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lets just hope this one floats !!
fire at will ! ... which one is will ?

Gopher

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Re: Bulbs
« Reply #3 on: October 21, 2016, 06:47:51 PM »

I have grain of wheat/rice bulbs, this one is a different shape, the gow don't seem to throw as much light out
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Klunk

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Re: Bulbs
« Reply #4 on: October 22, 2016, 08:05:43 AM »

If the wiring is already in place why not look at replacing the old bulbs with led bulbs and changing the voltage to cope.
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Gopher

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Re: Bulbs
« Reply #5 on: October 22, 2016, 09:30:02 AM »

I have been thinking about that I have found some 6v fisheye led's, I have also found those bulbs it appears I have been putting too much voltage through them they are 3v and I have been puttin 6v, being new to the hobby I am still learning
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Klunk

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Re: Bulbs
« Reply #6 on: October 22, 2016, 09:44:49 AM »

Lol. Ho with bright white leds.
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Gopher

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Re: Bulbs
« Reply #7 on: October 22, 2016, 07:31:40 PM »

just ordered 10x5mm wide angle led's and as a back up a voltage reducer and some of the proper bulbs, we shall see how that plays out
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malcolmfrary

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Re: Bulbs
« Reply #8 on: October 23, 2016, 07:32:59 PM »

Now might be a good time to search for and learn the rules about LEDs, the top two of which are connecting them the right way round and limiting the current.  They are diodes, as such they can be damaged by reverse voltage and they do not limit the current that they carry, something else has to do that job.
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Gopher

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Re: Bulbs
« Reply #9 on: October 23, 2016, 08:29:24 PM »

Cheers for that, where would be the best place to look? I know they have to be wired the right way but after that have not got a clue, I was just going to try various options and see what happens, they were only a couple of quid for 10 so I have a few to play with
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Colin Bishop

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Re: Bulbs
« Reply #10 on: October 23, 2016, 09:05:42 PM »

Have a look at this simple guide provided by Component Shop.

http://www.componentshop.co.uk/led-exp/

Colin
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Gopher

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Re: Bulbs
« Reply #11 on: October 23, 2016, 11:18:05 PM »

Had a look and if I have worked it out right I need a 33ohm resistor, I want to use a 7.2v pack and use 2 white led"s, please let me know if I am wrong
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malcolmfrary

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Re: Bulbs
« Reply #12 on: October 24, 2016, 08:12:40 AM »

Not knowing the exact requirements of the LEDs, but assuming two in series and 7.2 volts, 33 ohms looks reasonable.  Using the TSAR method there. (That Sounds About Right)
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Gopher

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Re: Bulbs
« Reply #13 on: October 24, 2016, 11:29:54 AM »

According to the component shop website the led's I have ordered require 3.3v times 2 =6.6 from the 7.2 batt = 0.6x50=33, I think that's right
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Stan

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Re: Bulbs
« Reply #14 on: October 24, 2016, 01:31:52 PM »

Hi gopher p/m sent.

Stan.
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Gopher

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Re: Bulbs
« Reply #15 on: October 24, 2016, 03:21:42 PM »

Hi Stan thanks for the pm, if I get chance I will give you a ring only my wife is ill in bed and I am babysitting grand children so I grab time when I can
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