Dejan Levec

April, 2009

Old mobile phone, RS232

A few days ago a friend send me an old mobile phone for using in a project about weather information in a remote location. On the internet I found which pins on telephone are TX, RX, GND. I simply connected them to USB -> RS232 cable, when I found out that I must destroyed it […]

H-bridge and transistors

[center][img]/media/someone16/uploads/BipolarHBridgeSchematic.png[/img][/center] For a couple of days I was building a robot … not really a robot, just a simple car, that I could controll by my laptop. Today I got the wheels spinning, but only in one direction. I intended to use H-bridge but I didn’t have both types of transistors (PNP and NPN) so […]