I have two L293D chips which are not behaving as expected. My setup is as in the diagram which is attached. Everything seemed to be working fine till I powered the Arduino Uno R3 through the Jack with a 9v battery. using this setup: http://playground.arduino.cc/Learning/9VBatteryAdapter
Works as expected for about 30 second then stops
Sometimes makes high pitched ‘squeek’[/li][/list]
Pretty much normal functionality but can move the motors without their separate battery supply
Can I have damaged these chips in any way? How can I test if the chips are damaged? What damages chips? Is my Setup ok?
Thanks for the help,
Robot2.fzz (6.48 KB)