Voltage amplifier designงาน

I am looking for freelancer who can design sheet metal enclosure for charger designed to be used for Cellphone and laptops. Output wattage of the charger is 100 W and input voltage is 90-260 V AC. Size of the enclosure will be 45 mm X 85 mm x 26 mm . Product will be premium quality and needs to be well engineered. All the 8 corners will have some metal or plastic covers to protect sharp side of the charger woo have 2 USB A connectors and one type C connector and Polycarbonate sticker and on the rear side it will have 3 pin mains female connector. Trying to make it water resistant.

A startup company based in Africa. Am looking for an experience designer. 1) Stop button (general stop for all applications) 2) Cooking. Manual Start button (for cooking for rice with temperature s...minuets and stop. Motor to stop when overheating. 4) Auto. Start Button ( this to start the rice cooking, wait for a period of 5-10 minuets and start the mixer. 5) Buzzer. (when power is on. when rice cooking is complete and when mixer is complete. 6) Appliance inner chamber should have a temperature sensor of 120 degrees) 7) Indicator lights to show when cooker and mixer is on. 8) Output voltage for cooking and mixer is 110vac/ 20amps (2 Relays might be required ) 9) Cables to the cooker heaters, temperature sensors, control buttons, motor and sensors should be plug i...

Design a speed controller PCB for controlling the speed of a 500W BLDC Motor for e-bicycle. Voltage Range 24-48V. Current Rating - 20 A. Circuit should include 6 MOSFETS, a microcontroller, 3 gate drivers and associated electronics for it to work.

I am looking for someone to help me with 5 ways audio intercom system using STM32. The communication will happen over 2000 feet wire. We need signal amplifier to transfer data long distance wire. Please bid if you understand and know how to do this project.

using HFSS which is an Emag software, to create a system where we can transmit power wirelessly in an indoor room. a simulation of the room that has 3 or 4 transmitters (the sources of power that are made up of an amplifier and a horn antenna) and then sees how the power is distributed in the room. Also to see how moving the transmitters affects the distribution of power in the room.

I have an LLC that I own and operate. Need someone to run my social media and eventually control my website that is currently being made and will be done within a week. I’m also having a logo designed and will be completed in a few days. My company is a Low voltage landscape lighting installation business. We install low voltage lighting fixtures for homes, pathways, trees and other specific areas. I’m willing to have the right person work with me long term. I’m an off Duty First Responder here in the DFW area and would love to give someone the opportunity to work with me. Thank you, Micah Bernardy Bernardy Lighting LLC

The mask would be designed such that there will be a small mic connected at the inside bottom part of the mask(just below our mouth), the design of the mask would be such that it would be comfortable to wear and also breatheable through N95 respirator, the weight of the mask would be as low as possible. There would be an external speaker which will be connected via bluetooth with the mic. KIndly refer this link:-

I am working on a project. After doing mathematical modelling I have differential equation,I have intial conditions for that and other required values for the solutions .The differential equation is describing the relation between charge and time .can any one help in solving this equation and find out the plot for charge vs time,current vs time, voltage vs time .I also provide you a paper in which all theoretical steps are given along with the answers for the plots. You have to solve the equations using MatLab and the validate the graph with the exact plots given in the last of paper which I attached.

Hi, I wanted a buck converter design using TL594 or similar IC . Specification:- IP :- 60 to 40vdc Output variable from 0 to I/P current variable from 0 to 5A simple buck with pot to adjust current and voltage

Measurement and control of power system Components involved : ESP 32/8266 , SIM 800L or Equivalent , ACS 712 current sensor , Z series Voltage sensor , 16 A relay Job : Development of hardware layout . development of software for the board . Communication of the board to be via MQTT

Please contact me for a work simulation as soon as possible. Really need to fix many things. The system i study have: 1- a PV generator which delivers a power of 8280W working with a voltage of 48Vdc 2- a battery of 48Vdc 3- a bidirectional full bridge DC-DC boost converter with dual outputs which takes 48Vdc to 180V 4- a fault tolerant 5 - level inverter which takes 360Vdc to 220Vac 5- Frequency response 6- Fault diagnosis by Support vector classification The two first are already done, 3 and 4 are blocked for SPWM generation, and the other not done. So let me know what is required. With thanks and regards,

You know all details of project

...We have custom conditions, The product can only be a technical item which means that it should not be a consumer good but a industrial good. It can be a consumer good too somehow but should remain in the branch of technical items. It can fall in automotive category too. Below are some of the examples of such products, 1 Valves (Ball Valve, Gate valve , solenoid valve etc) 2 Pumps 3 Voltage meter 4 Voltage transformer/coverter 5 Conveyor belts 6 Sensors 7 Actuators 8 Circuit breakers. Other conditions, We want you to pick a product in which slight changes can be done on the baiss of improvement and a demand of improvement from customer side. The candidate will figure out how we can improve it with all the estimated costs after reading and analysing reviews of customer...

The front of the house is tired and needs some help. We want to have more usable patio space. To do t...while widening the door space. Ideally, this opening will be 10-12 feet, but does not go all the way to the east side of the structure. Cement seating can be built in to the support walls. We would like a fire pit located some place on the patio. The existing iron railings will be replaced with clear glass and attached to the vertical walls of the balconies and the stairs. There should be low voltage lighting in various places on the patio and the vertical portion of the stairs. The grade slopes downward toward the west. Please feel free to comment in my feed if you have any additional questions. I will be monitoring this project on a daily basis to provide you with timely...

A given BLDC motor, being run with MOSFET based BLDC driver draws current when running free or when under load. We need a system to: 1. Vary input voltage using digital settings. 2. Measure current drawn at a particular given voltage and display data accordingly. More details on subjected matter shall be provided to interested candidate.

Hello, we are developing a Bluetooth Stethoscope to improve listening to internal body sounds. Below are some of the design ideas & constraints for our device. Design ideas and constraints PCB: Dimension would be max 20mm x 80mm. Microphone on one end of the PCB and the Mini USB on the other end. On/Off Button roughly centered. Device will be connected to a stethoscope on one end, same as mic side. PCB should have 4 small screw holes for assembly to housing, holes may be used for pin holes. Bluetooth: Bluetooth classic may be one of the only options for this device because Bluetooth LE is not yet capable of streaming high quality sound. This is not a heartrate monitor device, but rather a higher quality sound streaming device for internal body sounds. Bluetooth LE w...

I want some to help me to suggest component for Hbridge for DC motor 12V 15 amp continuous current. operate on TTL logical voltage

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I have been testing several small Bluetooth boards from inexpensive earbuds and adding amplifiers. I would like to create a gerber file to send out to jclpcb that accomplishes the same tasks in a single small, inexpensive board

Design IR LED and Photo Diode/Photo Transistor Based Proximity Sensor Circuit for Daylight/Outdoor Application. Need to design proper Analog/Digital filter which allows the sensing of hand/object from at least 10 cm distance even in bright sunlight. Supply Voltage 5V DC. Please note that TSOPs are not to be used for this application. Scope is to provide schematic, BOM, calculations for Filters etc. We would create the prototype based on the provided schematic to evaluate the result.

FPC meter with Arduino to check voltage and diode

Need to combine a converter of sound to ultrasound with a microphone and amplifier;

Hi, The task is very small to design and make a small report of a DC-DC voltage converter. MutiSIM should be used. A good regulation be doe

power system information .system with all the inputs and outputs also at what voltage the switch change from what battery to another. what are the voltage wattages, amps from each input and output. also specify where the fan its connected in fact where everything is connected in the drawing. also in a different spreadsheet give all the specificatios of the system in this formahttps://www.freelancer.com/users/l.php?url=https:%2F%%2Fspreadsheets%2Fd%2F1XUqNhFswBtmArQ6B

I need audio amplifier to work up to 1Mhz and to deliver around 170W of power. I will need only simulation done in LT spice nothing else

Looking for circuit for a 4 feet LED baton tubelight with battery backup of min 3 hrs. LEDs to be configured in min 100 lm/w. Supply voltage 100-300 volts ac with 20watts, 50-60hz. 3KV surge protection. Will also need over/under voltage protection 8watts on battery and will last for min 3 hrs Will run on ac electricity on 20w and in case of power supply going off it will run on backup batteries. When ac supply resumes it will run on ac and also charge the batteries and cutoff after charging. THD less than 15% Will need Schematic, Gerber files, BoM for project to be complete

I need to do program work (software) for different types of excitation system (Ac, Dc, and Static ) with synchronize generator connected to the infinite bus, Every type has 2 models and compares them in the terms of: 1- time response 2- ceiling voltage. 3- Settling Time 4- CCT(critical clearing time ) The requirement: 1-Electrical engineer 2- Expert person in Matlab or Pscad 3- Analysis person 3- deadline will be in a very short period

full-service electrical contracting firm for ... in general construction, manufacturing, healthcare, education and information ... voltage work, design-build services, award-winning sign design & installation, and more.

Using the Simulink diagram and algorithm attached, I am looking for a professional MATLAB programmer who can optimize the PID controller with MOPSO (Multiobjective Particle Swarm Optimization) to control the AVR (Automatic Voltage Regulator) system. The objective functions to be considered are Integral Absolute Error, Absolute Steady State Error and Settling time. I expect to receive the code and Simulink so I can run it on my Matlab. I will appreciate the description of how you link the Simulink and codes

I am urgently in need of swift help in recoding and editing the program of an Arduino-powered egg incubator project to perform two different functions. To begin with, I have garnered two different sets of coding from two sources - Arduino projects library and also a YouTube video tutorial. I have revised and overhauled the incubator project to my personalized needs and design by cross-incorporating some functions, winnowing them out, and synthesizing the required functions I am aiming for into a single project I am currently working on. Well, the two tasks that I want to add or must have in the workings of the incubator are:- 1. Make the buzzer sound when/if the humidity and temperature sensor is not working. 2. Replace the assembly of the normal LCD 1602 display and separate thre...

I hava a Li-Po Battery charging PCB project designed in Altium, i am looking for a PCB designer to add over discharge protection to that PCB such that battery voltage doesn't fall below 3.0V on use.

I need a voltage divider circuit design that can work with input voltages approx 300VDC. The desired voltage divider ratio is 50:1. I have various working sample designs to give you an idea about the scope of the task. Please contact me if you are interested in the project. After the project completion, I require a circuit schematics and a PCB board design to create a working prototype.

...SMS in the slot should be replace with a command to delete all sms. - Optional: can you write the code in a way that in the same time it execute a command (like 'start') it can execute other commands (like 'Voltage', 'temperature') even if will do it after the first command, before it will be done? (Maybe not using delay, but millis? ) 2. Any other SMS received, but not the commands in the code should reply a SMS ('Bad command') 3. Add a function that will send a SMS ('low battery') if the Voltage drops under a certain value (11.5V), but it should be send only once each time the voltage drops from 12V to 11.5V 4. I want to replace the SIM800l module with SIM7600E module. I am not sure if the commands are differe...

Mesh Current calculation and voltage

I am running Audio through an LRA through the 2605 chip and also directly with an amplifier and would like to find someone that knows how to match LRA design with the design of the device it's a genuine work.

Hello, I am driving several LRAs in series with an amplifier and need to design a system that will maximize the force of the actuator and minimize power usage. I also want to echo the audio to another bluetooth device. Have tried many variations. Need some expertise from someone who understands this and has worked with bluetooth, LRAs, amplifiers

USB to UART board utilising FTDI's FT232RL with galvanic isolation. RX to be pulled up to 3.3V TX to be shifted to 0-12V range without need for additional external power over the supplied USB 5V and inverted (signal, not voltage). (Signal Inversion *can* be done on the FT232RL but would prefer hardware method) Power, TX and RX Leds required. Additionally the board will require 3 mini SPDT switches that toggle 3 inputs between gnd and 3.3V. Ideally fitting within the attached enclosure.

Hi, I am looking for a 3 phase induction motor controller with following specifications: Input: 96volts DC through LFP battery O...controller with following specifications: Input: 96volts DC through LFP battery Output to Motor: 5.5kw, 50Hz, 3 phase 100 volt induction motor in delta connection, Poles:4, Controller should have circuit breakers for over temperature (motor + controller), over and under voltage and over current/current limitation Forward/Reverse control Speed control On/Off control Motor will start on load and load is dynamic Regenerative braking LCD Display for Speed, Battery, Temp etc. Note: I will need Schematic, PCB design (Gerber file & BoM) and code for the above project. I will also need a working prototype (payable by me) for the project to...

Budget: 50usd I need to individually control 64 input voltages on a chip in the range from 0V to 200V. I have an external power supply that can provide this voltage. Ideally, I would like to control everything from a PC using Arduino. I need someone to create a design for the extension board that is needed, ideally using as many off-the-shelf components as possible.

Budget: 50usd I need to individually control 64 input voltages on a chip in the range from 0V to 200V. I have an external power supply that can provide this voltage. Ideally, I would like to control everything from a PC using Arduino. I need someone to create a design for the extension board that is needed, ideally using as many off-the-shelf components as possible.

I need someone who is able to design a PCB with the following parameters: - 2x mic input (dynamic) -> mic preamp (controllable via Digipot or optocoupler via Arduino board) -> mono line output - 1x signal out -> splitted into headphone amp and speaker amp (~3-5W@4Ohms) (also both volumes controllable via Arduino) Operating voltage: 12V, schematics are attached. Every IC is free to choose by the PCB-designer, as long as it is highly available and low-noise with good quality.

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I am running audio through an LRA through the 2605 chip and also directly with an amplifier and would like to find someone that knows how to match LRA design with the design of the device.

Lua Scripters with Ardupilot coders and developers only. 2 x scripts We have a generator that is currentl...a servo PWM output. We currently have it running with MOT_BOOST which outputs throttle based on our total quadcopter throttle. This allows us to vary the mot boost and PWM max and minimums to vary voltage. 1) We would like code written to vary the MOT BOOST value when the voltage drops bellow a certain level for a set amount of seconds. 47V low to 49V high, keep it in there by varying MOT_BOOST by .1 (0-5 total range) for every 5 seconds the voltage is either above or bellow this range. 2) Otherwise we would also like a code written to output a SERVO6 PWM value and vary it according to voltage to keep it in that range.

ESP 32 creates square wave with adjustable duty cycle, frequency and amplitude which amplifies to max 24 V and modulates audio signal via a differential amplifier Amplification level is set by front panel potentiometer and displayed with 2 digit LED or LED bar graph Amplitude, Frequency and duty cycle should be set from a small App I would prefer a Chinese developer or one with strong experience on how to get this produced in China. Please make a fixed quote so you do not need to ask me "WHAT IS YOUR BUDGET'" - if this little project works out well I will have many follow up projects for you. Audio signal shall be used for light and electric therapy.

We have a ready medium voltage single line diagram 8kv with multiple transformers. We need to check it by an experienced HV engineer. Check, comment errors and if possible implement it in an automatic calculation tool like ETAP HV or other to confirm functionality, short circuit, protection relay settings etc....

El trabajo consiste en hacer que una placa NodeMCU ES...especificaciones del sensor provistas en el manual son las siguientes: - Wind Speed Sensor Anemometer Three Cups Aluminium Alloyed pulse signal output with 3m. cable - Output signal: pulse signal output - Start-up wind speed: 0.4-0.8 m/s - Resolution: 0.1 m/s - Measuring range: 0-30 m/s - Transmission medium: Cable transmission - Connection mode: three-wire system - Supply voltage: DC 12-24 V - Max. Power consumption ≤0.2 W (pulse); ≤0.3 W (voltage), ≤0.7 W (current) El link del sensor donde se podrán ver mas características es: :g:ITwAAOSwmi1evLTe Datasheet (imagen) de la NodeMCU v3 adjunta.

...using the HX711 amplifier. I want the output to be displayed on an LCD in real-time and be able to generate a log file into an Excel sheet and the graphs/plotter too. **I want the load cells input to be read independently, as each load cell is subjected to a different weight and the log file should display the output of each load cell separately** A function for calibration is a must and units of weight in grams are acceptable (other units are welcome too) The wiring diagram can be a simple drawing with description of each pin for easy hookup It is possible that I would add more sensors such as an RPM counter and Temp sensor later on I have the following components (Not sure If all is needed): 2 Arduino boards (UNO and Mega) 4 load cells (100g) 1 Load cell (1kg) 5 HX711 amp...

I need a complete drawing of low voltage single line diagram with appropriate wire choosing.

Necesito el esquema y el listado de mínimos componentes electrónicos necesarios para que una placa NodeMCU ESP...especificaciones del manual del sensor son las siguientes: - Wind Speed Sensor Anemometer Three Cups Aluminium Alloyed pulse signal output with 3m. cable - Output signal: pulse signal output - Start-up wind speed: 0.4-0.8 m/s - Resolution: 0.1 m/s - Measuring range: 0-30 m/s - Transmission medium: Cable transmission - Connection mode: three-wire system - Supply voltage: DC 12-24 V - Max. Power consumption ≤0.2 W (pulse); ≤0.3 W (voltage), ≤0.7 W (current) El link del sensor donde se podrán ver mas características es: :g:ITwAAOSwmi1evLTe