Just bought one of these from maplin


http://www.maplin.co.uk/Search.aspx?...source=15&SD=Y

£30, and has an RS232 interface so you can connect it to a pc/laptop and use it to monitor electronic circuits in real time.

I appreciate it's probably not got the best resolution, etc... but could be a useful cheap data logging tool for fault finding in cars

You can download the manual (not much use) and the software (inc. PDF with screen shots) from here http://www.uni-trend.com/UT60A.html#