Merlin garage door opener with blue LED lamp
3,141 views · Published 11 April 2010 · 3:00 · Indexed 10 November 2026
Channel: RODALCO2007 · 2010 · Science & Technology
The 25Watt interior pilot lamp had failed, and as you know those jobs often get left to:'' I do it later, or haven't got the right size lamp''. My lamp failed about ½ year ago and I decided to sort it out for once and for all, hence the LED option was chosen. Instead of white led's I opted for the blue led's as it looks very cool and gives plenty of light in the garage to find my way around. The resistors are set up 3 sets in series of (6k8 1 Watts in parrallel). Totals a 10k2 ohms 6 Watt resistor. From U=I*R therefore 240 / 10200 = 23.5 mA. Power rating I²R yields 5.6 Watts. As the lamp is only on for 10 minutes max. there is no overheating issue here.
