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| Is it safe to use a meter to test jamma pinouts whilst powered on? |
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| eggedd2k:
i want to check the voltage of the pins on the jamma connector in my cab. is it safe to do this without frying myself? |
| RayB:
Let me ask you something, ... if the power were OFF what kind of readings would you get? OK OK, partial answer to a mis-worded question. I guess the real answer is it depends if you know what you're doing... |
| Navmaxlp:
Voltage on most PCBs are so low that even if you take a shock it won't hurt or be anything to worry about. Trust me on this one hehe. As RayB said, you need to have voltage on to get a reading. Use the "one hand rule" where you place the black lead on a ground and only use one hand to test the voltage. This way, if there are any larger voltages on the board, you'll be safe. If you do take a shock this way, it will only go across your hand or arm and not across the heart which is the big concern with electrical shock as it can disturb heart beat patterns. Hope that helps. |
| SirPoonga:
--- Quote from: Navmaxlp on June 21, 2005, 01:54:58 pm ---Voltage on most PCBs are so low that even if you take a shock it won't hurt or be anything to worry about. --- End quote --- Right, your typical jamma psu does +5v 15A, +12v 2A, -5v 1A You will feel those but shouldn't be too bad. Ever touch your tongue to a 9v because someone dared you, we are tlaking shocks like that. Of course, it depends on what side of the transformer you are "touching" too :) it's odd ones like my asteroids psu that has stuff like 24v and 36v. |
| monkeybomb:
--- Quote from: SirPoonga on June 21, 2005, 02:04:02 pm ---You will feel those but shouldn't be too bad. Ever touch your tongue to a 9v because someone dared you, we are tlaking shocks like that. --- End quote --- A dare? that's just part of my morning ritual. |
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