I often run my laptop in the caravan - how do you think that I print badges at events.

It depends on what input voltage your laptop needs. Some will work straight from 12v - in which case you just need to make up a lead with the correct plugs on each end. If the voltage is higher than 12v (mine requires 14v), Maplin will sell you an adaptor for £19 - see here - my toshiba runs fine on the 15v setting.

You can also buy adaptors which will reduce the voltage - but do make sure that it's a regulated one and can supply the neccessary current (you can find this out from the handbook or by reading the details on the mains adaptor/charger.

Most adaptors come with a series of different plugs to fit most laptops, but check that you've got the polarity (+/-) the right way round.

You could also use an inverter to convert 12v dc to mains voltage (240v ac) - these are useful if you want to run a printer which is mains only. Maplin sell these for about £30 - although they keep doing special offers on them - I've seen them at £19.


Incidently if you wish to make up a lead to electrify your banjo, I suggest a 1/4 inch jack on the instrument end and a 13a three pin plug on the other.   ;-)