design help

Hello! I am trying to reverse engineer a motor driver and here is my design thought process so far: ESP32-S3 as my MCU DRV8320 Smart Gate Driver CSD88599Q5DC 60V Half-Bridge NexFET™ Power Block Where I'm currently stuck is figuring out how to power the above devices with a variable 24V/48V...

This is the first PCB I've ever designed, if anyone could look over it and let me know what I could add, something I should fix, or a more clean way to organize the design that would be awesome! I used decoupling capacitors near the power entry for the board, and also near the power for each of...

Hi all, I'm designing a Power Distribution and Controller PCB for a Clock/LED Display frame and I'm looking for some guidance on the best combination of power supply and PCB layout. I've designed a PCB with 21 WS2815 LEDs and will have a 3D printed frame panel that will hold the boards in the...

Hi guys, I'm really stuck and have been trying to figure this out for hours. I can't seem to understand what I'm doing wrong. I need to build a 3-bit Gray counter with an input x that controls the counting order as follows: When x = 0, the counter works in descending order (e.g., 000 → 001...

How to SafeGuard against EMP/High Frequency Attacks, Forced System Reset and Force System Failure IMPORTANT: I cannot use a microcontroller because of my living conditions whatever electronic that I own which contain firmware/software is vulnerable to re-programming attacks hence I can only...

I have been tasked to design a multistage amplifier with the following specifications: Gain(V/V) = 30, Rin = 20 kohms, Rout < 25 ohms, Power supply = Dual +12V -12V, Max Symmetrical Swing > 9Vpp (peak-to-peak), lower 3dB down point < 200 Hz, Upper 3dB down point > 5 kHz, Rload = 200 ohms. I...

I am trying to create a device that dispenses water. I want the device to be as cheap as possible, while still being able to dispense a specific volume of water. The amount it dispenses should be based on time if I use a 555 timer. I thought I could run a relay off of the timer so it could...

Okay so, currently wanting to set up a test for some rechargeable batteries, and developing a lower power mode for a system. The goal is to connect fully charged batteries to my devices to see how much current they actually drain. I have an estimate how long they should last, but its not exact...

Hello everyone, I'm currently having some trouble over a lab practice in which I was required to build an op-amp based function generator. The primary requirement is to generate square and triangle waves (varying their frequencies through potentiometers) using LM-741 IC's. Initially, our...

Hi, I have a PCB layout for which I need schematic design. Can someone create it?

I wanted the MCU I'm using, samd21g, to detect when USB is connected on the board. The USB is used to power some other things on the board and currently isn't connected to the MCU. Also, the MCU can only handle 3.3V. I have a pin open on the MCU that I can connect the power of the USB to it...

Hi everyone, I am relatively new to designing schematics and PCB's and have only ever done simple circuits up until now. I have tried my hand at designing my very first ESP32 based Dev board. I know that these can be bought for fairly cheap already, but wanted to have a go at actually designing...

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...

Greetings, I've been in a design for a while for my university. It's a security system based on sound(a glass break detector) but the point of the question is not the functionality of the circuit but the EMC issue. I've tried to reduce the EMI but I would like to ask to any expert any kind of...

Hello partners I come to you to help me determine what resistance values or what other components I need to be able to design a crowbar circuit that protects my sensor against overvoltages. My intention is to take care of my sensor for voltages above 40V. So I started to design this crowbar...

Hello partners The design that you are going to see next belongs to a sensor that I am building, this sensor will be capable of measuring voltages between 25-40 volts through the ADC of a microcontroller and at the same time feeding on these voltages. A fundamental part of every sensor is to...

So I recently purchased a 285W western electric transmitter as I'm trying to more or less make a microphone that can plug into a computer which uses a carbon button microphone from the early 20th century. I have little education in circuit design, though I know enough to know I probably made...

Hi All, Hoping that someone can put me out of my misery. I have been searching the internet for the past 5days for an answer to this question and feel like I am starting to lose my mind. Can anyone explain why the attached schematic has a 1N4148 on each of the SDI_5V, SCLK_5V and CS_5V lines...

I need help with these questions especially the third one is a bit hard to understand for me. You don't need to solve it. Just a little explanation

Hi guys.. I have to design a voltage amplifier.. The first task is to develop a voltage amplifier with an open loop voltage gain (with no attenuation due to source resistance and no loading effect) of about 10 to 15 V/mV where 1 V/mV = 1000 V/V gain. The input resistance of your amplifier should...