circuit

Hi everyone I need to make a circuit with the following elements: The output will be a siren connected to a 230 V and 50 Hz network. The control circuit will use a 9 V battery as power supply and an operational amplifier must be used, the siren will be activated with a relay. The alarm will...

Hi, I'm reviewing an Evalboard datasheet and a parallel rc circuit is used in the feedback line, which I can't understand why, what is the purpose of this structure, whose image I have added below? Datasheet Link: https://www.nxp.com/docs/en/user-guide/KT33810UG1.pdf (Page 18)

Hey all, this is an oddity of a request. First, I'm not an electrical engineer; next, I wouldn't know a good circuit if it gave me a lap dance, so...I'm asking the community for help. I'm writing a blog and would like to include some circuit diagrams; it seems like they would be perfect for...

I designed a simple circuit for LEDs with 5V 1A. This is the schematic, all resistances are 8.2Ω. But when everything is ready and power 5v 1A at the input. I catch it is only 0.3A on my multimeter. It should be (5.0-3.3)/8.2*4 = 0.83A. Why is there such a big deviation?

I'm new to electronics and decided to learn something new by trying to put together a small rectifier circuit that converts 24VAC to DC. So I put together a little full-wave rectifier circuit that consists of four diodes and an LED and ran into an issue when I tried to measure the DC output...

I've bought a WiFi Smart Aroma Diffuser in repackaged condition, but as I've tried to use it, it didn't seem to work, as well a spark was visible when I tried to reconnect the power cable. I've disassembled it, and started testing the pcb, and I've noticed that the main power cables are shorted...

I have an RF Explorer to use to scan what RF's are around me. I am curious as I'm am just getting in learning about wireless transmission and propagation. However I can't explain these power levels of -10 dbm all the way to -0. The RF Explorer does seem to be working correctly just based off of...

Hi guys, I am new here. FYI before I get started, I am not an engineer, designer, programmer, or anything of that nature. I’m just a dude who loves a challenge, and I love diy home projects. Now, I hope this is the right forum to ask this kind of question! So let me get started: I have lately...

I've been working on this for the past few hours and I'm at my wits end. Basically, I'm trying to amplify an input voltage with a 100-ish gain using an AD8226 on a breadboard. I'm using a +/- 5V supply to power and op amp and using a 10 mV test for the input. I'm also using an oscilloscope to...

Hi people, It has been quite a long time since I posted anything lately :) Refering to the XOR gate schematic and truth table above from here, I have designed them in LT Spice. Higlighted in green are the 2 inputs and purple is output.However, to my surprise, when A and B are both true (A=5V ...

I'm currently doing my master thesis, and I'm now at a point where I have to control a few AC motors with a microcontroller. From my previous study about the subject, and from previous similar thesis, I've noticed a common practice is to use an optocoupler to separate low voltage from high...

Hi, I am only on my 5th week trying out TinkerCAD for our Logic Circuits course. We are tasked to create a 7-Segment Display Using Logic Gates only. I did all the boolean expressions needed for each segment using K-MAP, and identified the boolean expression needed to create my circuit. I am...

Based on the Jtag stage diagram, before Jtag shifts the bits (Shift-DR) the scan cell needs to capture the bits first (Capture-DR). Where does the bit come from? Is it from some test patterns (which has 0s and 1s) and Jtag loads them via digital pins during the capture-DR stage? How many digital...

Hi All, I am considering ordering some parts for a theoretical circuit, and I am wondering if you think it would work. Basically, it's an induction balance very low frequency metal detector circuit that would use a PAM8403 audio amp IC, a speaker, a battery, and two inductor coils. My theory...

I started the basics of PCB and doing schematics around 6 weeks ago in my Computer Engineering Drafting and Design class. We used EasyEDA online tool to create the SCH and PCB for our assignments/activities. Our project now is to combine the circuits that we have made before into one system so...

We have a project coming up in my Engineering Drafting and Design class and I don't have much idea yet on how to accomplish it. We are tasked to combine different circuits to design one complete device. Then we need to of course make the Schematic (and simulate it), as well as creating the PCB...

Hi there, I am new to this form and new to electronics in general. Apart from occasionally wiring a plug I haven’t really dealt with electronics since leaving school 15 years ago. I am planning on making a “busy board” for my son. It’s basically a 200 x 120 x 50 mm plastic box with holes...

DEC1 is similar to half adder , b<K> is number of the SAR output code ,DEC2 is like binary caculator keep carry , but how to do this circuit ?

Hi, I am having a hard time figuring out how to fix this warning. It says that that symbol '0v' is connected to a net with two different NetNames. It refers to the other symbol located on the upper right which is 'Vpp'. It tells me that I need to change the name or remove the symbol at all. I...

Hello, I have tried to add the schottky diode(spice model from onsem) as you can see on the schematics on LTspice but I keep getting the same errors and I have watched the intro from this link : Adding Third-Party Models to LTspice IV but I still get this error I have saved the same schematics...