Timeline for 74HC595 overheating problem when controlling NPN transistors
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 4, 2016 at 21:15 | comment | added | Fabian Fahrenholz | I think I did not get what you mean. Could you be a bit more specific? Especially at the part with the inductor? | |
| Dec 4, 2016 at 20:52 | comment | added | Spehro 'speff' Pefhany | All I can suggest is to follow the current path and imagine an inductor + resistor in series and look at what harm that could cause. | |
| Dec 4, 2016 at 17:02 | comment | added | Fabian Fahrenholz | Could it make a difference to connect the leds to the usbs gnd and the ics to the aruinos gnds? | |
| Dec 4, 2016 at 17:02 | comment | added | Fabian Fahrenholz | Tested it already and it worked well. This is the point I don't understand. It was able to work and then suddenly without any warning got damaged. | |
| Dec 4, 2016 at 16:59 | comment | added | Spehro 'speff' Pefhany | Test it without the LEDs connected or reduce the LED current by 10:1 without changing anything else. It will not fail (my prediction). You will then have your answer. | |
| Dec 4, 2016 at 16:55 | comment | added | Fabian Fahrenholz | Btw the circuit worked for about 10 minutes per test and about 1 hour in total (about 6 tests) | |
| Dec 4, 2016 at 16:54 | comment | added | Fabian Fahrenholz | If it's what you said shouldn't the error occure everytime the led is on or under certain condition instead of occuring randomly? | |
| Dec 4, 2016 at 16:33 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 3.0 |