| Electronics > Beginners |
| I keep killing mosfets - what I do wrong? |
| << < (4/6) > >> |
| PMA:
I think that the resistor is needed for reverse battery protection (page 9). So it would be good to have, but not mandatory. According to page 13 (right side) and page 6 (bottom), typical current is only 1mA or so. |
| Jwillis:
--- Quote from: PMA on September 29, 2019, 05:38:47 am ---I think that the resistor is needed for reverse battery protection (page 9). So it would be good to have, but not mandatory. According to page 13 (right side) and page 6 (bottom), typical current is only 1mA or so. --- End quote --- Ok but that mosfet is pulling current from some where. Could always check to see how much current is being drawn with a ammeter. If it more than a milliamp then that chip might be faulty. |
| PMA:
That is a good advice. However, the problem is already solved. My soldering iron was in ungrounded outlet which caused large potential difference between grounded PCB and tip of the iron. |
| Jwillis:
Thanks Ian. Something we all should take into consideration how lucky many of us have been with the old wood burners we've been using. The BTS555 is a class 3 Military spec (4,000 volts and above)ESD device .When you consider that some of the commonly use op amps like the TL082 are a mere class 1( 0 volt to 1,999 volts) or the 555 timer of a mere 500V . |
| Yansi:
and btw, when will people learn, that ZENER diodes are UNUSABLE as analog input protection? |
| Navigation |
| Message Index |
| Next page |
| Previous page |