IR USB Adapter Multimeter

The digital multimeter series UT71 from UNI-TREND provides a cheap measurement solution with reasonable accuracy. The set includes an USB Interface Cable and a Windows based software. Unfortunately the USB Interface doesn't work with Mac OS X. But the optical interface can be easily soldered for less than 5.00 €.
More detailed description you will find here (http://tech.rbulla.de/doku.php?id=tech:ut71)
Of course one may also use a 3D printer to print the adapter.