Timeline for Why does water damage low-voltage microelectronics so easily?
Current License: CC BY-SA 3.0
7 events
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| Jan 22, 2016 at 15:04 | history | edited | endolith | CC BY-SA 3.0 |
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| Sep 5, 2013 at 13:11 | comment | added | Danny Staple | Bear in mind even a couple of AA batteries can deliver damaging and dangerous currents if shorted across the wrong pins. Reverse biasing, scr latching on a 5v device, with a 5v supply, may cause permanent damage to the part. | |
| Sep 5, 2013 at 12:21 | comment | added | user3624 | @AlvinWong It depends on what you mean by CMOS. Technically, almost every modern chip is CMOS, the the Intel i7 will die from 2v to the wrong pins. Although the 4000 series are certainly more robust in this regard. | |
| Sep 5, 2013 at 10:11 | comment | added | Anindo Ghosh | @AlvinWong That depends on which chips you are referring to. Most 1.8 Volt ICs will be destroyed even with 5 Volts, let alone 9. | |
| Sep 5, 2013 at 9:43 | comment | added | Polynomial | Corrosion is another issue. Water tends not to be exactly pH 7, but rather somewhere in the range 6.5 to 8 depending on your mineral content. The various salts in the water start to oxidise solder joints and other component surfaces, leading to increased wear and damage. We used to see this a lot in mobile phone repair - the fix involved using a vibration bath and solvents to clear off the residue, then manually touching up any corroded joints. | |
| Sep 5, 2013 at 5:45 | comment | added | Shamtam | Additionally, try sticking two probes from a multimeter into a glass of tap water and measure the resistance. Distance between the probes will affect the measurement slightly, but you may be surprised at what order of magnitude the result comes out to be | |
| Sep 5, 2013 at 3:37 | history | answered | user3624 | CC BY-SA 3.0 |