6 ms·
That is ghetto fabulous (heat-shrink tubing with diode). Nice juxtaposition with the SMD stuff. Well, the diode did as it was supposed to, and prevented the r
by chopsueyar 15y ago
That is ghetto fabulous (heat-shrink tubing with diode). Nice juxtaposition with the SMD stuff.
Well, the diode did as it was supposed to, and prevented the reverse-polarity from damaging anything of vital importance.
Nice write-up.
- kragen 15y ago> Well, the diode did as it was supposed to, and prevented the reverse-polarity from damaging anything of vital importance. I don't think so. If the diode were being used to prevent reversed polarity, it would simply have not conducted. If it were a normally-reverse-biased shunt across the power supply, then blowing it would have left the laptop unprotected but otherwise functioning (and it would have had to blow something else in the process, like a fuse). So I suspect it was intended for something else.
- chopsueyar 15y agoWhat do you suspect it was intended for (keep in mind it is DC at that point)?
- DSpinellis 15y agoAccording to the data sheet http://datasheets.maxim-ic.com/en/ds/MAX1908-MAX8765A.pdf http://datasheets.maxim-ic.com/en/ds/MAX1908-MAX8765A.pdf "D2 protects the MAX1908/MAX8724/ MAX8765/MAX8765A when the DC power source input is reversed. A signal diode for D2 is adequate because DCIN only powers the internal circuitry."
- kragen 15y agoI guess I was wrong. Thanks!