does anyone have any of these I can buy? only need 4 cant seem to find them in the uk
Pinball info
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Wanted 4 white #86 LED bulbs
- Thread starter RudeDogg1
- Start date
Sorry, not in the UK and I'll be buggered if I can find shipping costs on the website but 4 of these would only cost $9:
http://na.suzohapp.com/all_catalogs/lighting/91-5WB-61W2
From SUZO-HAPP, purveyors of fine arcade stuff and joysticks
http://na.suzohapp.com/all_catalogs/lighting/91-5WB-61W2
From SUZO-HAPP, purveyors of fine arcade stuff and joysticks
OP
OP
Not bad ty dude
I'm assuming they need to be 6V? If not, maybe some T5 car LED bulbs? I found them as cheap as £1.99 for 10 on eBay, posted in the UK!
I'm linking this auction because it has a good photo:
http://www.ebay.co.uk/itm/2x-White-LED-T5-286-12v-Dashboard-Light-Bulbs-/351050054179
They're for 12V but all you'd need to do is change the small resistor inside for 6V. You an see in the photo above each bulb has a resistor (pale brown with blue, red and brown bands - 620 Ohms) and a diode. The resistor limits current for the desired voltage (12V on cars) and the diode stops the LED from being destroyed if the lamp is inserted the wrong way (LEDs only work one way around so the + and - need to be the right way).
I'm linking this auction because it has a good photo:
http://www.ebay.co.uk/itm/2x-White-LED-T5-286-12v-Dashboard-Light-Bulbs-/351050054179
They're for 12V but all you'd need to do is change the small resistor inside for 6V. You an see in the photo above each bulb has a resistor (pale brown with blue, red and brown bands - 620 Ohms) and a diode. The resistor limits current for the desired voltage (12V on cars) and the diode stops the LED from being destroyed if the lamp is inserted the wrong way (LEDs only work one way around so the + and - need to be the right way).
OP
OP
Not bad wander what kinda mission it would be to take apart
Wonder no more! I've already done it as I was curious to see what was inside the test LEDs I bought for my VECTOR:
http://www.pinballinfo.com/community/threads/bally-vector.11719/#post-69421
I had to nibble the edges off with pliers to get it open but some of the frosted domes LEDs I bought just came apart once the wires had been straightened.
http://www.pinballinfo.com/community/threads/bally-vector.11719/#post-69421
I had to nibble the edges off with pliers to get it open but some of the frosted domes LEDs I bought just came apart once the wires had been straightened.
OP
OP
might have a go no idea what resistors I need to buy tho
Just use a calculator like this Single LED one here: http://www.hebeiltd.com.cn/?p=zz.led.resistor.calculator
Ideally you need to know the exact specs of the LED, but for a white LED it is reasonable to assume a Forward Voltage Drop of 3.5V (Volts) and an operating Current of 20mA (milli-Amps) the resistor should be 425 Ohms. But it's not an exact science so just use the nearest common value, 470 Ohms. At 6V this drops to needing just 125 Ohms, so nearest common value is 150 Ohms (and rated at at least 0.05W). So, if you're desperate and have a local Maplin to save postage these will cost you 36p each: http://www.maplin.co.uk/p/metal-film-06w-150-ohm-resistor-m150r
Ideally you need to know the exact specs of the LED, but for a white LED it is reasonable to assume a Forward Voltage Drop of 3.5V (Volts) and an operating Current of 20mA (milli-Amps) the resistor should be 425 Ohms. But it's not an exact science so just use the nearest common value, 470 Ohms. At 6V this drops to needing just 125 Ohms, so nearest common value is 150 Ohms (and rated at at least 0.05W). So, if you're desperate and have a local Maplin to save postage these will cost you 36p each: http://www.maplin.co.uk/p/metal-film-06w-150-ohm-resistor-m150r
OP
OP
cheers m8 I took the plunge and ordered 10 ebay ones for £1.77 only thing im never sure about is how do you know what way around the resistor should be?
Resistors aren't polarised, they work either way. You only need to worry about diodes and electrolytic capacitors, but they are always clearly marked (usually a band on diodes and - negative sign on caps). You'll just need to unfold the wires and pull the LED out of the plastic T5 base, unsolder the existing resistor and solder on the new one.
I feel I ought to buy some of those car LEDs myself to test that what I'm telling you is true and actually works! I would hate to give unfounded advice but am confident that my theory is sound!
I feel I ought to buy some of those car LEDs myself to test that what I'm telling you is true and actually works! I would hate to give unfounded advice but am confident that my theory is sound!
Resistors aren't polarised, they work either way. You only need to worry about diodes and electrolytic capacitors, but they are always clearly marked (usually a band on diodes and - negative sign on caps). You'll just need to unfold the wires and pull the LED out of the plastic T5 base, unsolder the existing resistor and solder on the new one.
I feel I ought to buy some of those car LEDs myself to test that what I'm telling you is true and actually works! I would hate to give unfounded advice but am confident that my theory is sound!
Your theory is indeed sound.
Its also fairly easy to make your own LEDS if you so wish. You can smash old bulbs and use the two prongs inside to solder LEDS onto. Good for messing about:
OP
OP
Resistors aren't polarised, they work either way. You only need to worry about diodes and electrolytic capacitors, but they are always clearly marked (usually a band on diodes and - negative sign on caps). You'll just need to unfold the wires and pull the LED out of the plastic T5 base, unsolder the existing resistor and solder on the new one.
I feel I ought to buy some of those car LEDs myself to test that what I'm telling you is true and actually works! I would hate to give unfounded advice but am confident that my theory is sound!
Cheers dude
RudeDogg1, are these LEDs that you are after going to be put in a TZ clock? If so I think I might have some. I ordered 8 from Germany and have used 4, so by rights there should be 4 lying around in one of the many boxes under my machines.
OP
OP
Yes they are indeed
I can't take a look till next weekend I'm afraid, but I'll let you know if I find them.