When building microcontroller projects it’s often desirable to connect them to a computer. Most RS232 computer ports are able to read 0 and 5 volt TTL data levels however there are some computers that require voltage levels that are closer to the true RS232 spec. Most people use a MAX 232 chip when there is a need to follow the spec. correctly, but it’s possible to build your own circuit.
Warning, DIY Pneumatic guns can be dangerous. Be very careful if you attempt to build your own.
Congratulation to all of the winners last week. The prize this week will be useful to anyone who needs to do presentations. It has a laser pointer, LED light, ball point pen and extendable pointing rod. This contest will run for this weekend only (June 23 – 24, 2007) . Ending time is based on central standard time. To enter, identify the item pictured above and give an example of
