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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
hello, i've been trying to diagnose and fix an oddly behaving panasonic TX-50DX802B. i would greatly appreciate anyone's help or guidance!
the voltage drops to zero every minute or so. i'm currently battling with just a steady red LED that only flashes when a button on the remote is pressed. no...
I'd like to solder the ceramic capacitor for decoupling across GND and VCC of U1/U3. I don't know what the best placement would be on this circuit, so help with visual markings on the photo would be helpful!
Detecting a failed capacitor is easy sometimes just by performing a visual inspection, but there are many cases in which you would need an LCR meter to spot any failure. In this article, I covered the most common failure cases of electrolytic, polyester (MKT), and ceramic (MLCC) type capacitors...
I tend to overthink and find simple concepts diffcult. I understand the charging of cap C1 in figure “A”. My question is in figure “B”. With the switch there, cap C1 discharges thru R2 back into + plate of C1. Why doesn’t current get pulled from battery thru R1 and R2 as well? Doesn’t it...
I want to make a capacitive dropper and i have a 203 film capacitor that i will use for it. What will be the voltage drop on it. I tried to use an online calculator but it doesn’t work.
In this video, I talked about 3 types of failure in the electrolytic capacitors and how to detect them. You might need a benchtop multimeter or an LCR meter to detect all failure types.
Okay. I found other similar posts, but in them I haven't found the kind of answers I need.
I am building a very simple low amperage 300vdc power supply using a 115vac source, to a switch, to a 370vac 80uf single Run Capacitor, to a 500v bridge-rectifier, to 300+vdc output cord and connectors to...
Hi, Im trying to fix a remote for a gas fire but I'm quite inexperienced, I think I've narrowed down the problem to a capacitor, Im not sure what capacitor it is or where to get a replacement, the chip the capacitor is connected to gets hot when I attach a battery to the circuit but nothing...
Hi all,
I have a question regarding modifications to a "standard" plate-capacitor with plate area A, plate distance d and filled with a dielectric.
The equations for capacitance and electric field in this case are well known.
I found examples for what happens when inserting a thin conductor...
Hello Friends,
I'm new to the forum and rather a noob in relation to electronics math.
I own a Siemens Induction Hob model number: EX675JYW1E/01, which recently raised plastic smelling smoke while I used it.
After opening the device's enclosure with an electrician, we found that one...
Hi Guys,
One of the tests that i have been requested to do by my manager in order to validate a capacitor is to measure the voltage loss across the capacitor,
does anyone have an idea how to do that?
thank you in advance
I have old electronic devices from 1990 saved What is your recommendation for the storage period without the electrolytic capacitors failing due to disuse? I asked manufacturers and they didn't answer or they were confused
I've built a few tesla coils before, one solid state coil and one flyback tesla coil, however I'm looking to build a new one. I have (as mentioned in a previous post), a surplus of old tubes. I also found a bunch (20-30) of old vacuum capacitors rated for 20kV, they are the adjustable/tunable...
Experimenting with 10mm mini motor w/linear screw, 4 wire, 5VDC & wondering if a bypass capacitor is feasible for direct drive, no controller? If yes, what size cap is appropriate? Here's the unit: https://www.ebay.com/itm/383717016058
I'm coming from a programming background and although I'm doing more electronics recently I'm still very much learning.
I'm using a bluetooth module (this one **broken link removed**)
It has an LED function but it's really annoying. It blinks quickly when bluetooth is not connected, and blinks...
Hello everyone,
I'm searching for help since electronics are not my field of study...
I'm trying to build a simple project that requires an LED with a constant light output (the LED must be wired to a coin battery cell i.e. CR2032).
When reading the LUX from the LED I can see the LUX decreasing...
Hey guys,
I have just been introduced to time constants and I'm having some trouble with this question.
What frequency value do you plan to use to obtain the correct time constant for a 22 kΩ resistor? (Hint: It takes five time constants for a capacitor to go through the full charging...
Greetings! I've run across a very strange terminal type for a capacitor, that I've never seen before. Anyone able to help identify the terminal style? It will get me closer to finding out if it's a source able part.
Thanks!
Sorry that I don't have a picture from the bottom. This is what I...
I have an old accelerator board used in the PDS slot of an Apple Macintosh SE/30. The board was manufactured around 1994. I want to replace the electrolytic capacitors but I'm not sure how to decode the numbers printed on the caps. Here's a photo:
As you can see the numbers are:
22
6 A...
I provided a circuit which should discharge at a specific time. But this circuit is not working as an oscillator. How should I make circuit which will give me oscillation?
I'm working on a flat screen tv it had 7 capacitor blown i replaced 6 of them already but the 7th one i dont have on hand (680uf 25v 105*c VENT) can i use a (1000uf 25v 105*c VENT) instead?
My college professor asked us to take a real life problem/device and design and solve its circuit using transient response and Laplace transforms. It has to be a simple circuit, maybe just some capacitors, power source, switch and resistors... My biggest problem is finding a connection to a real...
I constantly read that capacitors provide reactive power. So how are they used instead of a battery? I mean in a battery the voltage and current are in the same phase. How is the phase change between the voltage and current in a capacitor eliminated without using an inductor, to use capacitor as...
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