0
votes
1answer
38 views

CX-20 Quadcopter Part

One of the ESC's on my quadcopter is missing a component. I am unsure what this component does or where to find a new part. Is it a sort of resistor?? What size? it features no markings that I can ...
0
votes
1answer
70 views

Code on capacitors

I accidentally let the magic smoke out of two (tantalum?) capacitors, one on an Arduino-based board and one on an RF reciever. Apparently they don't like being hooked up backwards. :-) For the ...
1
vote
1answer
125 views

What are those “cheap” parts kits made of

I hope this will not be categorized as buying related question because my question is not really on should I buy this or this. I usually find some parts kits, usually resistor/capacitors/trimpots, ...
7
votes
2answers
374 views

What if you put a capacitor betwen the plates of another capacitor?

Based on: Is there a dual of the transformer? The picture of the capacitor inside another capacitor seems viable to me. If a transformer is two inductors with a common magnetic field, its dual ...
1
vote
3answers
319 views

What components can an FPGA replace/emulate?

I've been under the impression that FPGAs were merely, well, field-programmable gate arrays, but I've seen some example schematics with resistors, capacitors, and such in them. As such, can an FPGA ...
6
votes
6answers
581 views

Basic Electronics - I want to learn the “why”, not just the “how” [closed]

I have been looking for a very basic book on electronics, but many of them explain what the components do (and how they are made) and then go into designing circuits that do stuff. They tell you to ...
-1
votes
2answers
187 views

Capacitors in RFID reader

I'm trying to understand a schematic of an RFID reader. Circuit: What capacitors are used - electrolytic or ceramic capacitors? I've seen schemes of RFID readers that use electrolytic capacitors, ...
1
vote
3answers
947 views

How to implement and tune a LC band-stop filter?

I have designed a simple LC band stop filter with a center frequency of 433MHz. The schematic looks like: The caps are NP0 0603 and the inductors are from the Coilcraft 0603HP series. The values ...
6
votes
1answer
243 views

What are suggestions for resistor and capacitor substitutions?

When thinking about substituting components, I know that resistors are easily substituted within their 10%/5%/1% tolerances. But what about wattage on a resistor? Is it safe to do substitutions, say ...
3
votes
2answers
316 views

Need help identifying a capacitor

I have a ceramic disc capacitor that got cooked in a power surge due to a faulty generator. The capacitor was between the fuse and transformer of a circuit board for a pellet stove. It is RED ...
14
votes
1answer
2k views

Why shouldn't electrolytic capacitors be short-circuited?

In the answer to another question, I read that it's bad to short-circuit electrolytic capacitors. Why is that? What happens if I do?
19
votes
8answers
6k views

Organizing electronic parts?

I've got one of these cabinets, which I intend to use for storing electronic components: It has 24 drawers (each 175 x 69 x 37mm). Every drawer can be subdivided into up to six compartments by ...