capacitance

Hello! I want to automate my Philips 3300 Series LatteGo coffee machine, and ideally without opening it up and voiding warranty. The cheapest, simplest idea seemed to be remotely activating the capacitive touch buttons on the control panel of the machine. It seems remote activation of...

My idea is: If two charged capacitors are connected in parallel so that their positive plates are connected together and their negative plates are connected together. Then, if the capacity of one of them changes, a significant current is created in the circuit. If we put a consumer (such as a...

Hi, I'm a physics student, and I have a small problem for a lab that I have to solve. Here is my problem: I must create a circuit which uses capacitors to gradually close a light, but in addition, we must pass the current from the capacitor which discharges by the base of an NPN transistor. A...

I have a flash gun which runs off 2 AA batteries. They drain very quickly. The flash unit lives in the same spot all day, so I would like to swap the AAs for a plug-in solution (the flash unit does not offer this). I took a chance with some 'dummy AA' cells, which are basically empty shells...

Hi guys, I'm new year and I'm really stuck. I'm doing research about electromagnetic energy harvesting. I have a wound coil and I'm trying to compensate its inductance using a capacitor. The inductance is around 18 H. The coil resistance fluctuates from 150-190 ohms. I tried adding a 562 nF in a...

So I have been playing around with some disposable cameras to make little tasers and that's been all fun and everything but I would like to step it up now to something a little bigger. The only problem is I have no real clue what I am doing and don't have any clue on how to power it in the first...

I am a complete beginner, but I would like to learn how to use Altium Designer. Sorry in advance for the silly questions. I have the following two circuits (pic no. 1) that I want to combine into one circuit and draw in Altium Designer schematic. I tried to draw the mentioned circuit in Altium...

I have a device that works on **3V battery** (2 D size cells) now I want to debug it so that all the devices work correctly. My device consist of **atmega 328p**, running on 08 MHz Crystal which gets readings from ADXL345 for 2 seconds and then store it in 25Q64FVSIG flash memory and then RFM96...

Hi All, This is probably a very easy question, but if I have a 3.7v lipo battery attached to a voltage regulator outputting 3v, and I have a 100nF filtering capacitor to filter out noise, should I put the capacitor before or after the voltage regulator. Also, would I just want the voltage...

I am seeking ideas, or thoughts, on how to make a cable connected touch pen invisible to the capacitive touch screen of a modern smartphone without mechanically lifting the pen (see illustration). This is for a two axis (no lifting!) planer lego robot I am building to teach machine learning, in...

Hello everyone, I have been trying to understand fully the behaviour of the capacitor and over its two plates when exposed to sudden changes in voltage, and I divide my request for help into two questions: 1- How and why when we apply a sudden voltage over a capacitor C1_Plate_1, the C1_Plate2...

$$R_{balance} = \frac{NV_{rate} - V_{bus}}{I_{maxleak}}$$ N is the number of capacitors in series Vrate is the rated maximum voltage for any one capacitor Vbus is the bus voltage (the expected voltage across the whole series of capacitors) Imaxleak is the maximum leakage current Rbalance is the...

I have been struggling with this issue: https://electronics.stackexchange.com/questions/647796/why-doesnt-the-voltage-at-the-resonance-frequency-go-above-the-input-frequency Does anyone have an idea why that is the case

Note: English translation is below. Herkese merhaba, Bu devrede komponentin görevleri nelerdir? Örneğin: - Dirençler ne işe yarar? - Bu devrede diyotlar ne işe yarar? - Toroid sargılarının sayısı artarsa ne olur? - Birden fazla kondansatör paralel bağlanırsa ne olur? - Devrenin verimli...

Hi all, above picture is a ne 555 flip flop circuit (1 off, 1 on) and vice versa. Lets say the red led receives an input (1) that is a constant dc voltage, how do I make the red led to go from dim to bright and then from bright to dim and vice versa with the blue led? Are there any schematic...

Why we are using ferrite bead and bypass capacitor, if both are for removing noise? Can you explain why we are using both in the circuit and difference between using them, and where we need to use and how to calculate it?

Hi All, To realise the below circuit I designed a circuit in MultiSim and tried ti simulate. But I'm unable to do so. I would appreciate any help in this regard.

Hi everyone, I'm trying to design a circuit whose battery can be hot swapped. I have a 3.6V battery connected to a boost converter, outputting 9V. I'm powering a small computer that requires a 9-20V input, and at idle consumes ~10W. I figured that, so that the computer stays on for 10s (with a...

Hello everyone, How can we calculate the voltage rating of an SMD ceramic capacitor. Is it dependent on the package size?.

In one of the article of "All About Circuits" about capacitance and inductance of twisted pair cable i found a set of formulae for computing capacitance and inductance of twisted pair cable based on diameter , spacing and dielectric constant as seen in the snapshot.. Can anybody give me the...