Electronics > Electronics

50$ robot> PC motherboard protection

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razvanc_roro:
I've understand that if something is going wrong in the circuit, I could do the "smoke test" on the PC's motherboard. Also found out that there is some components that I might use to save "my precious" from being turned into ashes  :D :
ST202EC or ADM3202
If anyone knows about this, let me know. Or this circuit it's too easy for making a foolish mistake.

Thank you!

Greetings from Romania!

Admin:
hmmm thats a good question.

I believe both recommended AVR programmers have a built in protection circuit (especially the more expensive Atmel one) . . . but I could also be wrong . . . does someone know for sure?

Worst case scenario you will only end up damaging your serial port.

If you are using a serial to USB converter, it is almost guaranteed to have a safety buffer built in.

Anyway, before plugging in your circuit to your PC, you should always use a multimeter to make sure all the pins are doing what they are supposed to do. :P

JonHylands:
I fried a $500 PDA by connecting +5 volts to the ground line on the TTL level serial port.

- Jon

Admin:
ouch.

ed1380:
been doing a bit of   ;)

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