Multistage transistor amplifier trabalhos
I am trying to read 4 output values from a quadrant photodiode (S4349) and use them for further digita...trying to read 4 output values from a quadrant photodiode (S4349) and use them for further digital calculation through SPI connection. Currently, I made the schematic shown in the picture below with operational steps as follows: -Light is detected by the active area of the 4 cells of the photodiode -Signal from each cell is amplified separately using a trans-Impedance amplifier (OPA381) -The analog output signal from each amplifier is the input of a channel of the ADC (Analog-to-Digital Converter MCP3912A1-E/SS) -Finally, the digital data will be further forwarded through the SPI interface from the ADC to the SPI Master device (All the components can be changed except the ...
I would like to build a powerful Bluetooth speaker running on batteries. Looking into a class D amplifier with could power two 10" speaker or a 12" speaker with tweeters. The power could be around 1500W.
Looking for mechanical engineer with experience in consumer product design to create unique look and then mechanical design ready for production. All electronics components will be provided, this is only for mechanical and visual design with high pressure on aesthetics and luxury look. See the attached file for more details
Searching for software engineers/designers to develop a custom software using API data/instructions to control an audio amplifier.
Looking for an embedded engineer to design an IR remote control receiver to adjust the volume, select different inputs, power on/off ,tone control bypass for an audio amplifier / preamp Please read complete attached scope of work before submitting your quote Will be helpful if you can share reference of past experience of similar projects
We need an electrical engineer designer or relevant qualifications working in ELV to design SMATV, MATV, and IPTV in G+8 hotel apartments. The Task includes the following Preparing all tv system equipment and headend selection (televes is preferred) Calculate the distribution loss selection of the proper amplifier
i have 60 12v motors (they have own board with some protection) , which i try to control from arduino im doing now with a 679 darlington transistor but there are lot of cables, i try to make things simple and i need to design a pcb like this in image (atachment) i want to add there RJ 45 port and add motor wires to it for simple connection. i need to do it via any cheap online platform like JLPCB or similar
Need a sound engineer to come to my bar/lounge to connect 4 speakers and require rewiring from all speakers to the amplifier
...project). The system should consist of two kinds of devices: “node” and “weather station”, both devised for outdoor installation. Overview We are asking for the design and development of both the hardware and software according to the following requirements: The “node” device will take data from a sensor list and it will stream video (with infrared camera) and then play music (sound speakers and amplifier). It will have wifi to communicate with a router. The device will be able to start and end irrigation through an electro valve thanks to an API (with the info about the time of irrigation). The power supply connected to the device will be backed by a solar panel and a battery. It is essential to estimate the daily consumption of all device...
...Lightweight compact device for portability The gesture based speaker takes Bluetooth speakers to the next level of modernization. The device makes use of 6 watt speaker with subwoofer along with arduino, battery charging board, Lidar sensor, audio amplifier IC, Bluetooth module and Battery Set. The system uses Bluetooth module to allow phones to connect to the speaker foraudio input. The speaker also allows for an AUX connection for audio input and a separate charging input connector for battery charging. The audio signal received is amplified by the amplifier IC for boost the signal without any data loss. This signal is now passed on to the speaker module to be converted to quality sound. The Lidar sensor is mounted on top of the Bluetooth speaker. The input from sensor...
I require an electrical engineer with a background in audio tube valve technology to design a guitar amplifier.
I want to modify my TIP122 switching circuit for high speed operation. Attached old circuit.
...points spread across 512 sub-carriers. A quadrature modulator (QM) is used for further modulation. The modulated signal and a 40 GHz RF pulse are combined after passing through the mixer. In a Mach-Zehnder modulator (MZM), the signal is optically modulated after which it is broadcast across several HG modes into the FSO channel. The signal is initially amplified using a semiconductor optical amplifier when it reaches the receiver (SOA). To separate dissimilar modes, a mode filter based on the non-interferometric modal decomposition concept is employed. After that, a PIN Photodiode converts optical signals into electrical signals. To retrieve the original data stream, this signal is demodulated using an OFDM and QM demodulator. Different weather conditions like rain, fog, ...
Hi I want a whole house speaker wiring diagram for speaker installation in 2 storey house, 4 zones with 2 speaker and an amplifier in each zone.
Audio installation for restaurant including cable and amplifier
It is a very small project. I have Systemline system installed, but its Sonamp amplifier started buzzing very loudly, so it needed to be changed. I bought a new one, and thought that I would be able to connect it to the system, but it is a bit too complex. So, I need someone to come and connect it back to the system. Thank you! We are based in NW1.
Only a hardware development is required. No code. Time for project development: max 6 days. Sensor used for input: piezoelectric Microcontroller used to receive the amplified sound: ESP32. Output voltage range: 0-3.3V. Midpoint Bias near V=1.65V (half of 3.3V) Operational Amplifier model will be defined before start the project. We have some circuits tested but with problems as clipping and sensitivity signal. Signal amplification should be the higer possible. In oder to avoid the noise, a 10-15Hz filter can be used. We can cut any input or output signal above a specific voltage threshold Battery used: 1x3.7V (voltage used as input for sensor = 3.3V) Software to use: KiCad for schematic and any other software for simulate it (for example LTspice). Project files will be pr...
Please see the chat and amplifier that you quoted on. The understanding is that you complete the rask for a fixed price although you asked that a hour rate project is to be made. We both agree that when the design is done that the fee of 450 is to be paid for the task, irrespective of the time spent to complete the task. My engineer will review the schematics and consult if he sees any possible problem on the design. Then you can complete the pcb. Please take care of the component that is to ne used as not to become obsolete.
I have done three year diploma in Electronics. And lots of small projects made at home like Amplifier, Night circuit, Security Alarm and many more.
I need an RF amplifier. The modulated signal has a fundamental between 0.1 and 23MHz, and the carrier wave is 3.1MHz. Input signal is 500mVpp, and output must be 50Vpp. The load is 300 ohm. The power supply is 18 V VDC Heat must be managed with a small heat sink and no fan.
Hi Muhammad S., I noticed your profile and would like to offer you my project. We can discuss any details over chat.
A hardware development is required. Sensor used for input: piezoelectric Microcontroller used to receive the amplified sound: ESP32. Output voltage range: 0-3.3V. Midpoint Bias near V=1.65V Operational Amplifier model: we will define it before start the project. Battery used: 1x3.7V or 1x9V Software to use: KiCad. Any other software for simulate it (for example LTspice).
o Using the provided data, draw the AM/AM, the AM/PM and the output power vs. input power characteristics of the device under test. o Build a look-up table based model of the device under test (AM/AM and AM/PM) behavior. o Apply the input signal to the designed model, and compare (in time and frequency domains) the model output to the measured output. Quantify the error between these two signals. What can be the origins? o Using the device under test model, synthesize a suitable digital pre-distortion lookup table.
...supplier, and because we are in the need of operating in multi-channel our own SDR PCB. Currently there are Low-Cost + High Quality SDR's that have one FPGA and one Transceiver. The Software Defined Radio must have its own PCB. It need to operate on both GSM, EDGE, 4G LTE, 5G simultaneously using one FPGA. We understand it would need 4 transceivers, with each one TX + one RX and on-board a strong amplifier. The power though the board for long-range connectivity via the TX + RX amplifiers need to be 15W+. The BOM should be similar to the X115 - however this operating on only one channel within the cellular spectrum. We would need 4 channels: 4 x LTE or mix of GSM, EDGE, 4G LTE, 5G. We would need someone with broad experience with Software Defined Radios, PCB Design, PCB a...
We are searching a people who having experience with Linear sensor and displacement measuring sensor developer with sound knowledge in MCU and Sensors. m18,m30 analogue output sensors with 0.25% accuracy with amplifier unit ..
to test functionality and determine problem with control4 amplifier. 2. Determine repair or replacement 3. Replace and program
...engines exceeds that of the high performance SSME's. This means the payloads of both the Delta IV and the Ariane 5 not only can be improved over their current values using adaptive nozzles but can even exceed that of the case where the engines were replaced by the high performance SSME's. So this allows us to at least put a lower bound estimate of the payload possible both as an SSTO or multistage vehicle by comparing to estimates using fixed nozzle SSME's. That is to say, if you imagine replacing the engines in the Ariane 5 core or Delta IV core with SSME's then you can get reasonably accurate estimates of what the payload would be by using the rocket equation or a payload estimator such as on SilverbirdAstronautics.com. But this is only appropriate for ...
...project). The system should consist of two kinds of devices: “node” and “weather station”, both devised for outdoor installation. Overview We are asking for the design and development of both the hardware and software according to the following requirements: The “node” device will take data from a sensor list and it will stream video (with infrared camera) and then play music (sound speakers and amplifier). It will have wifi to communicate with a router. The device will be able to start and end irrigation through an electro valve thanks to an API (with the info about the time of irrigation). The power supply connected to the device will be backed by a solar panel and a battery. It is essential to estimate the daily consumption of all device...
Looking for a Power supply designer for an amplifier. An AC-DC converter with two power outputs ___100v DC | AC ---| 230V |___20v DC People with some experience on Power supply is preferred.
Electronic skin (e-skin) is an artificial skin that mimics the sensing capabilities of human skin, which brings many potential applications in robotics, artificial intelligence, prosthetics, and health monitoring technologies. Many attempts associated with various mechanisms/approaches and materials...e-skins. Significant progress has been made in recently years. This paper firstly reviews the most recent progress on nanomaterial- based e-skins according to four major sensing mechanisms, with an emphasis on the effects of various materials on the sensitivity and stretchability of e-skins. Then the paper updates the progress and effort with respect to multifunctional e-skins and organic-thin-film-transistor based large-area e-skins. Further development possibilities are also briefly ...
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Objectives: Create a circuity and electrical diagram with the code for an Arduino temperate monitoring system Components: LCD 2X16 IC Green, Red, and Yellow LED Alarm system Type K thermocouple with MAX6675 Amplifier Communication port between Arduino and S7 PLC Peltier Component to cool down an electrical contractor PID Control system for the Peltier cooler The system is to monitor the temperature of an electrical component (contactor) with a Type K thermocouple, this will send information to the Arduino which will use a PID controller system to increase or decrease the current going to the Peltier system such that the temperature remains at a constant 45Degrees C, the system will allow the user to see if the temperature of the electrical component is within the allowed range....
Looking for an experienced designer to develop RF and Microwave components and we required design and prototype support for our projects. This contract includes multiple projects. Must be experienced with RF and Microwave. We have specifications available for applicants to review upon request Required experience Filters and Filter banks Power combiner Log Am...experienced designer to develop RF and Microwave components and we required design and prototype support for our projects. This contract includes multiple projects. Must be experienced with RF and Microwave. We have specifications available for applicants to review upon request Required experience Filters and Filter banks Power combiner Log Amplifiers Quadrature hybrid coupler Low noise amplifier and driver amplifier Wa...
I need an audio amplifier built for a project. The design and parts listed are in the attachment below
Create a small example to help me start with STT on raspberry in python ( or c++ ) with following features: Start Coqui STT Engine directly after boot and play mp3 on 3,5mm output when Engine ready for listen STT on usb mic. Python example ( Micr...following sentence of user Depending on appearence of two keywords in whole string after hotword do the following Play mp3 over 3,5mm jack invisible on both hdmi Play mp3 over HDMI1 ( with visual player and simple bar visualisation instead of cmdline visible on hdmi1 ) Play mp3 over HDMI1 ( without visual player still seeing cmdline to catch sound only by hdmi video/sound splitter to other amplifier ) Play Video on HDMI1 / on HDMI2 / on both ( after video stop hdmi1 return to cmdline, hdmi2 show static sample jpg ) Play video mute...
Please, only bid if you have an access to an actual 3D Scanner. I'd ship the items via mail for precise 3D Scanning and Modeling. These are amplifier/cabinet corner protectors. Thank you in advance!
...have: 1) What hardware to use to host HA 2) Ajax alarm integration: - SIA Alarm on HA - Ajax UART Interface 3) Underfloor heating - Smart switches controlled by HA - Room thermometer + presence sensor - Room thermostats to control? 4) Sabiana A/C - Sabiana ModBus integration - Same thermostats integration 5) Audio - Microphones integrated in the BTTicino - Control lighting and other events - Amplifier connected to speakers 6) Water meter - Find smart water meters (how many?) and integrate 7) Energy Management - Tesla battery - Solar Panels 8) Ubiquiti Protect - Remote backup for cameras In you proposal please confirm your experience with the above systems, and suggest the best way to work on this. I don't have a fixed timetable, moving in the hou...
I am looking who helps in my research work Design and Analysis of CMOS Class E Power Amplifier using Harmonic Reduction Technique for 5G Application". There are four objectives of the work and each should submitted as seperate results for the above said title Amplifier type Cascode design Harmonic reduction technique: upto freelancer feasibility and helps in increased power efficiency compared to previous works Expecting Deliverables: any article refered for implementation, results of each stage, mathematical equation and values(softwares can be used for design stage) For detailed objective , once i got connected will discuss
My son requires a schematic to follow for building a working example of switching a positive output to a 100w 12v bulb using a MOSFET or transistor with a 12v trigger. ( NOT from a board like Arduino. )
Refer to attachment Gate Circuit I have two raspberry PI's connected to each other through the UART. There is a gate circuit in between the two RPI's. The purpose of the gate circuit is to pull the GPIO pins LOW during periods of no data transmission (this is necessary to protect an amplifier not shown in the circuit diagram and not hooked up for the purposes of this project). The attached uart_tx_V3.c program pulls the GPIO pin (pin 24) HIGH which opens the gate in the gate circuit to allow the signal to pass to the receiver raspberry pi. Once the file has been sent, the uart_tx_V3.c program pulls the GPIO pin LOW to close the gate and not allow voltage to pass to the receiving raspberry pi. So far, everything seems to work except uart_rx_V3.c does not know when to st...
Long Range mode Audio RX/TX – i.e. Coded PHY, 125 kbps Bluetooth 5.2 LE Coded – Need at least 2,000 Meter range, line of sight using skyworks amplifier The LE Coded PHY Hardware and Software/Firmware Project to deliver Duplex Audio Stream between two dedicated BLE devices with a minimum of 48 hour standby time and 6 hour talk time direct link between headsets
This project is part of a medical device prototype. It is a 110V output amplifier, capable of delivering between 100-3000 watts into an 225 Ohm load electromagnet, operating at frequencies from 4-300 Hz. The ELF parameters made the oscillator circuit of special interest. A simple R555 chip setup may be adequate, though several may be necessary to for complex waveforms.
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...to USB converter (FTDI chip) to pull the RS data into the computer. Two of the devices RS-232 devices are able to talk to the computer through the USB adapter. The other two I have not yet luck. The latter includes the RS485 and the issue maybe correct wiring as the instructions are skimpy (German). The devices are a motor, a temp controller, a Alicat mass flow meter and pH Electrodes via an amplifier. This is for a 6 bioreactor process control, monitoring and display application. There are 6 bioreactors, each of them has an Alicat massflow meter, a pH meter, a stirrer (RPM meter), and a heater with temperature probe. All signals come through RS-232 or RS-485 to the above mentioned USB Adapter. The 2 USB Adapter are connected to the laptop that runs LabView (2014 64bit). Initi...
I have a power amplifier CInepro 2k6 v3 it has a blown power PSU, I have sourced another working amp, The cinepro 3k6v3, luckily enough it has the exact same PSU board within. As you can see from the attached pictures the original from 1st amp is blown to bits, would it be possible to reverse engineer between the 2?
I am using Arduino nano , a mic a sd card reader and speak with amplifier. I want a button to rec sound where it can be done multiple times and store in the sd card and when play button is pressed everytime and random audio will be played from the recorded audio.
I need the programming for 16 different annunciation in a micro-controller board like Arduino or equivalent. when ever the respective pin gets HI corresponding annunciation should be made in audio output, which will be connected to an amplifier.
We need premium packaging design for our handcrafted bamboo product Bamboom Amplifier.
Requirements: 120 Ton boom design U shape Design Multi stage Must include all parts for full functions in and out. Must have cylinder design and multistage mechanism for extensions and retractions The preferred design must be set up to work in stages of extension priority, Stage 1 then 2 then 3 then 4 and 5 Retraction must be in the reverse order. Requires Bill of materials All Machining parts must be done is solid cam for Turing machine with tool paths and preferred tools FEA calculations All parts must be in Solid Works and Solid Cam 3D renders Truck Chassis used is Kenworth T800 Steel Materials is 960E Chinese steel Must have manual man basked and attachment Must have Jib for additional height and attachment Must provide all files 2D CAD drawings 3D motion Video of pin locking ...
