Accessories - do they need a .........?

can any one help me with the wiring for that? A basic drawing that I could follow:

Its 12v dc power supply to power 12v leds. the led's will be wired to a terminal block. can any one advise how to wire the relay? switch? to rx? and finally to terminal block?

thanks
billy

Quote:

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mosfets would be a bit trickier as you have to match up the right voltages.

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On the low current side or the business side?

If you want it RC then you will have to use an RC relay. The method that I described earlier in the thread will keep the lights lit for the whole time that the robot is powered. Second method easier to do and cheaper.

thanks for the help guys.

next question
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I'm going to make a siren for the bot using a high and low 12v car horn( non air type). How would I be able to create a dealy between each horn for example.

The switch is on ( ie power goes along the cable) but i would like the power to go to the high tone horn first for one second and then go to the low tone horn for one second and then it starts over again ( making a siren ). How would i be able to make this work? would i need a delay unit?

I can't think what they're called, but the thing that makes Indicator lights on switch on and off in a car (some sort of relay) would do it I think......

how do these work?

http://www.ebay.co.uk/itm/DC-12V-Del...item23125e8116

If I were to set this for a minute would this delay the power/current? - I mean would it wait a minute before my LED's would get turned on?

or is it the opposite? it would keep the LED's on for a minute? then turn off?