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Happs Illuminated Pushbuttons...Hot!
Brax:
24 incandecent bulbs are going to produce heat no matter what you do IMHO.
If you truly want no heat than go with LED's. Simple as that. The initial cost will be more but you won't ever have to replace them, you don't need a transformer and they produce zero heat. The Pro's easily out weigh the cons.
Ted_Striker:
LED's are the way to go. Happ sells LED replacement bulbs that will fit all of their stuff (buttons, coin doors etc etc). But if you don't want that huge expense you could possibly try a small pc fan in the control pannel... a chipset fan or something similiar to blow across the lights... you probably have one of those laying around.
Just an extra suggestion to get you thinking... I personally would go the LED route.
liche:
Hate to burst your bubble Brax, but LEDs do produce heat. Take a white LED and drive it with about 30mA current (usually the maximum rated continuous current for the device) and after a few minutes that LED will be pretty warm if not hot.
There are one to five watt LEDs available now (made my Luxeon) which are finding there ways into high performance flashlights and even automobile headlights. These LEDs actually have a built in heatsink because they get so hot.
Brax:
Sorry to leave loopholes. I was assuming he knows he doesn't need 1000 footcandles coming out of his buttons.
low powered leds will work fine for his application and will produce imperceptible heat. White leds are more expensive too so if you have red buttons you can use the cheaper red leds.. etc.
Wienerdog:
--- Quote from: Brax on November 26, 2002, 12:36:32 pm ---Sorry to leave loopholes. I was assuming he knows he doesn't need 1000 footcandles coming out of his buttons.
--- End quote ---
I was just searching for the current thread on putting LEDs inside Happs pushbuttons and thought this was a funny comment. I don't know, I like the idea of 1000 footcandles/button.