voltage

I have an inverter that has blown 3 SMDs i have narrowed it down to either caps or resistors. Is there any way that you guys can help. These components blew when the client ran their inverter off the car battery when the car was running. So I'm guessing over voltage.

Hello everybody, So I can't seem to figure this one out. I have a card reader (Nayax Onyx) with a constant 9v on pulse cable. I have a 12v relay switch. https://www.otronic.nl/nl/relais-module-12v-2-kanaals.html Connected 9v pulse cable to IN, 12vdc and -12vdc to power the relay coil...

Hi all, I need your ideas again. I am trying to convert a trusty 8 year-old device (Braun Face) from an AA battery into a rechargeable. (they make rechargeable versions of this now). (It is too much hassle opening and closing the battery compartment on these. You need a coin to twist the base...

Apologies if this is in the wrong thread but can someone explain Kirchhoff's current and voltage laws to me. I cannot seem to remember. It is all slipping my mind. Even Calculus which I understood eventually with no issue is basically leaving my mind. I'm not sure why. I feel ashamed to have to...

How can I find resistor values form voltage drop across the resistor I needed? 5V DC supply will get convenient into 2.3 V and goes GPIO of Controller and LED is connected to indicate the supply is on I want find value of resistor if the voltage drop is 1.9V and 0.7V for R1 and R2

Hello I have a DC voltmeter and I would like to design a simple circuit to that can allow measuring the RMS AC voltage on the same meter. I was wondering if using a bridge rectifier is good practice or does it have any drawbacks? The voltage range is 0-20Vrms, so: Vmax = Vrms/0.707 Vmax =...

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 designing a constant 5 volt output switching regulator that bucks 12 to 24 volts down to 5 volts while supporting 5 amps. It is used to boot up a Raspberry Pi with a 10 inch screen. At 12 volts, the Pi will boot up fine. At 24 volts, around halfway through the bootup, the regulator will...

Which electrical signal is better for industry among the following? Why? 1. 0 to 10 volts signal. 2. 0 to 20 milliamps signal. 3. 4 to 20 millimeters signal.

Hey all! :) I was looking for a solution to protect the analog pins of the ESP32 microcontroller. My circuit can produce voltages up to 5V and the analog pins of the ESP32 can only withstand 3.3V max. I found a solution online (picture attached) but I don't understand how the circuit works. I...

$$R_{balance} = \frac{NV_{rate} - V_{bus}}{I_{maxleak}}$$ 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...

Hi Everyone I have designed simple P-Channel MOSFET Circuit! it works well. However, when low Source power is applied(1V), glitch occurs in the output signal. I tried R,L,C component, But it didn't work What can I do to get rid of this? Circuit...

I am trying to build a circuit to emulate a lipo battery. Basically the circuit consists in a power supply to emulate the discharge behaviour and a variable load to eulate the charge behaviour. This is the circuit in a simplified way This basically generates 2 circuits...

I asked chat GPT, and it said TCRT1000 and TCRT5000 are not suited for ops above 5V. But interestingly I have read a research paper where TCRT1000 has been used at 9V. I would like help decoding these datasheets and understanding whether its safe to use these sensors at 12V, I don't really trust...

Hi, I am trying to replace a battery powered circuit with a AC to DC adaptor circuit. I have a 5V adaptor but the device requirement is 1.5V. So, what is best way to reduce this voltage? Is using a resistor good enough? If so can you help me in understanding how to choose the value of resistor...

I want to protect my LED TV from low and high voltages and also from voltage surges. Required output voltage range 200 - 250 V AC (RMS). I want to make it simple and effective one. Which one of these two options work best and please recommend other solutions 1. Just use V275LA40BP to protect...

I'm an automotive mechanic that specializes in electrical/drivability diagnosis. I like helping other techs get a better grasp on this aspect of our trade. Now imagine I'm with another tech and I have a battery and a multimeter in front of me. I measure the battery's voltage and get 12V. Me...

0-5 V to 4-20 mA linear conversion from voltage to current signal transmitter, this is the circuit I want to make. Materials used in the circuit: XTR101 BAT249 BD243 Level transmitter I am setting up the circuit, I get 5 V at the output without connecting the level transmitter. When I...

I want to play music from dfplayer mini with an rfid card reader. When I set up the circuit on the plate, I get a voltage drop, I don't know why, very meaningless ı use 5vto3v3 ams1117, entry 10uf exit 10uf and normally I was going to feed it with tp4056, I would switch my circuit with a...