motion sensor/computing

kdawg | 15:46 Mon 14th Mar 2005 | Home & Garden

3 Answers

HI,

I am trying to wire a domestic motion sensor for a house to trigger a small 6v motor. Thing is the motion sensor thing runs off of a normal socket, and i wnat to attach the motor to this except this would blow the motor. Does anyone know, in basic electrical terms, what i need to regulate the current so that the motor doesn't blow?

thanks

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Tweed

It will be the voltage that needs lowered, not the current, as that is determined by the load (motor). It sounds like you need a step-down transformer, so if you know what voltage the motor expects (and whether AC or DC), you can buy a transformer to do the job.

kdawg

Question Author

The motor is 6v DC. Would you have any idea what type of transformer i might need and is it easy to connect?Thanks for your all help.

Tweed

You can get a range of step-down transformers that plug into a wall socket (via your motion sensor). They're like the mobile phone charger, or power supply to games etc. something like this

http://www.maplin.co.uk/Module.aspx?ModuleNo=226&TabID=1&source=15&WorldID=&doy=15m3

You can set the output voltage on it, but I'm sure you can get a fixed voltage unit cheaper. It's rated at 300mA, which can power loads of up to 1.8 watts at 6 volts.

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