"Chris Holmes" wrote
| I have purchased a "Kojak light" (orange unfortunately) from CPC ...
| Now for the question, this thing contains a low wattage motor and a
| 21W inditator bulb, so I presume it's drawing about 2A at 12V. It
| could do with being controlled from the opposite end of the church (by
| the guy who is also doing the sound effects).
| If I made up a suitable cable to feed the 12V down one or the other of
| a. Would it work?
| b. Would the cable go bang?
| c. Would it b*gger up the sound system?
a. There would be a lot of voltage drop in the cable, so it might not work.
b. Probably not
c. Could well cause clicks when you switch on and off
You could either:
1. Use a relay with 2A contacts near the power supply and Kojak light,
reducing volts drop, and have a low-current feed through the sound multicore
to work the relay coil off a battery.
2. Plug the mains PSU into a remote control switch and use a radio keyfob to
work that, twenty quid from Maplin, switch 10A mains so would do a lot of
If you wanted a blue light you can get them from Gadget Shop or Maplin, but
they use a mains pygmy bulb so don't reflect as much.
PS are you sure it's 21W bulb, my Kojak light is a 55W