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Author Topic: 50$ robot> PC motherboard protection  (Read 3509 times)

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Offline razvanc_roroTopic starter

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50$ robot> PC motherboard protection
« on: May 07, 2007, 12:28:42 PM »
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!
Try do your best without doing anything! Possible?!?

Offline Admin

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Re: 50$ robot> PC motherboard protection
« Reply #1 on: May 07, 2007, 01:15:56 PM »
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

Offline JonHylands

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Re: 50$ robot> PC motherboard protection
« Reply #2 on: May 07, 2007, 02:12:35 PM »
I fried a $500 PDA by connecting +5 volts to the ground line on the TTL level serial port.

- Jon

Offline Admin

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Re: 50$ robot> PC motherboard protection
« Reply #3 on: May 07, 2007, 02:25:30 PM »
ouch.

Offline ed1380

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Re: 50$ robot> PC motherboard protection
« Reply #4 on: May 07, 2007, 02:34:49 PM »
been doing a bit of   ;)
« Last Edit: May 07, 2007, 02:35:54 PM by ed1380 »
Problems making the $50 robot circuit board?
click here. http://www.societyofrobots.com/robotforum/index.php?topic=3292.msg25198#msg25198

Offline JonHylands

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Re: 50$ robot> PC motherboard protection
« Reply #5 on: May 07, 2007, 02:51:24 PM »
No, just a case of using a 3-pin molex connector to plug into a 4-pin connector. I had a momentary lapse of reason, and plugged it off-by-one.

So, after that I decided I would never again be lazy - even if I didn't need the fourth pin, it would be on the connector anyways...

Some lessons you have to learn the hard way.

- Jon

Offline razvanc_roroTopic starter

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Re: 50$ robot> PC motherboard protection
« Reply #6 on: May 08, 2007, 11:33:12 AM »
Thank you all for replying my message! Your answers replyed my questions.
Keep in touch!

Bye!
Try do your best without doing anything! Possible?!?

 


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