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Q&A What are these mystery components (one of wire coil, another labeled "100-10L A9")?

The component with the coil of wire is an inductor. Judging from the small size, it is probably only a few µH. There are lots of uses for inductors, like for filters, switching power supplies, tu...

posted 1mo ago by Olin Lathrop‭  ·  edited 1mo ago by Olin Lathrop‭

Answer
#2: Post edited by user avatar Olin Lathrop‭ · 2024-04-04T12:22:24Z (about 1 month ago)
  • The component with the coil of wire is an inductor. Judging from the small size, it is probably only a few &micro;H. There are lots of uses for inductors, like for filters, switching power supplies, tuned oscillators, and others. I would not try to guess the use from this scant information.
  • The component to the left of the inductor in second picture looks to be a diode. It only has two terminals. The stripe at one end probably marks the cathode.
  • The component with the coil of wire is an inductor. Judging from the small size, it is probably only a few &micro;H. There are lots of uses for inductors, like for filters, switching power supplies, tuned oscillators, and others. I would not try to guess the use from this scant information.
  • The component to the left of the inductor in second picture looks to be a diode. It only has two terminals. The stripe at one end probably marks the cathode.
  • <h2>Added</h2>
  • Lundin has pointed out that the black component on the left is probably a tantalum cap, not a diode. In retrospect and given the markings, I agree that it is a definite possibility that I just didn't think of earlier.
#1: Initial revision by user avatar Olin Lathrop‭ · 2024-04-03T15:24:19Z (about 1 month ago)
The component with the coil of wire is an inductor.  Judging from the small size, it is probably only a few &micro;H.  There are lots of uses for inductors, like for filters, switching power supplies, tuned oscillators, and others.  I would not try to guess the use from this scant information.

The component to the left of the inductor in second picture looks to be a diode.  It only has two terminals.  The stripe at one end probably marks the cathode.