| The light barrier system described in this article allows accurate measurement of the absolute speed of model cars, planes and other moving...
| The light barrier system described in this article allows accurate measurement of the absolute speed of model cars, planes and other moving...
| In an earlier article on light intensity measurement using the PC (Elektor Electronics February 1998 Supplement) it was claimed that accur...
| We have reason to believe that this is a unique and novel circuit. It measures ambient light intensity by means of the serial port on your...