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    16,405 design zigbee circuit jobs found, pricing in USD

    ...custom-built circuit and a few more components. The idea is to run this OTG at a predictable & reliable temperature/time and control via-mobile using bluetooth connectivity. Steps involved: 1. Rip open existing OTG and understand the system. 2. Insert an NTC sensor at an appropriate place to get the temperature 3. Heaters must be connected via SSR so as to be able to control power precisely 4. Use input via mobile using a bluetooth terminal (available on google play) that sends temperature setting and time. The input will be read in by the circuit and executed. 5. The circuit reads in the temperature and time and runs the heater till the temperature is achieved and holds on to it. PID will be useful here for efficient functioning. 6. Use Arduino / raspberry...

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    Hello Wang I want to change the Audio circuit. Delete BA3121 and TDA2822. Please use LM4861 with 5V DC Vcc. Please change Schematic for approval first Please add second LDO 3.3V regulator for optional use when we need 3.3 for U1 but still need 5V for Audio. Please change PIC footprint. Use PIC18F24-I/SS-ND 28SSOP

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    Automation of Fish farm 5 days left
    VERIFIED

    I am looking for an engineer to design a control panel with PLC and HMI for an indoor fish farm . We must be able to monitor it online and extend the system in the future . We need to monitor temperature and oxygen levels in 12 tanks , nitrate levels in 2-4 areas of the system . Readings outside the norm to activate alarms . There are 2 pairs of circulating pumps -2 alternating pumps and 2 backup in case the first two fail . Pump failures to activate alarm . Also want to potentially control 12-15 valve actuators. Temperature monitoring to switch the heating circuit. We need the full schematics with identified components and completable software. Components to be used should be considered on the basis of cost , computability and ease of use , ability to extend . Will su...

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    Hi Jian J., I noticed your profile and would like to offer you my project. We're seeking urgent assistance with firmware development / patching. We can discuss any details over chat, or preferably via phone call. Our Budget is flexible within reason due to the nature & timeline of the work. I look forward to hearing from you!

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    Hi Taha M., I noticed your profile and would like to offer you my project. We can discuss any details over chat.

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    The task is to design an RF energy harvester circuit for dual-band frequencies from GSM/900 MHz and GSM/18000 MHz using Keysight ADS software. It requires transmission line impedance matching and a rectifier circuit. The circuit will be fabricated later so layout design is also required. Please see the attached pdf for details.

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    ...objectives with this board are possible. My goal is to understand and create a PCB using ESP32 chip acting as the brain, allowing me to program attached zigbee and zwave chips that will broadcast signal, connect to respective devices, send and receive commands from those devices. Also onboard the ESP32 which has wifi and BLE integrated allowing me to send and receive those messages/commands to the Cloud. The only aspect I'd like to focus on here though is the full PCB integration of ESP32 and those chips, if something like this is possible, recommendations/drawbacks. I have the hardware pieces used below. *As a note, I'm looking for hardware design and protocol implementation here which does take a lot of detail, not looking to purchase and use an already exist...

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    IT'S NOT CREATING A WEBSITE!!!! We are a Company for Sport-Timing, specially for Equestrian- and Ski Sports. The software for Equestrian Jumping and Ski already exists and customer can look theyr results here: (Live Timing Equestre...discipline Dressage, Jumping and Cross and the Overview for "Eventing" - the user can see in the overview all results for Eventing and ranking - Some little extensions and cosmetic works... - We are the owner of the codes! - We don't pay any upfronts or initial costs - Please only real Professionals and full stack developer - Further Updates are guaranteed also for Ski Nordic, Multi-Sport, Circuit Pro and Rally Pro - Estimated time to finish this project: < 15h The uploader is written in C++ and the website is...

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    Electronic Design Engineer 3 days left
    VERIFIED

    We need China Based Electronics Design Engineer. Who has Experience on PCBA Design Product Circuit Design Prototype Development. Experience on Lithium Battery,Solar Charge Controller Development. Only Experience Candidates Required. Only from China required

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    ...objectives with this board are possible. My goal is to understand and create a PCB using ESP32 chip acting as the brain, allowing me to program attached zigbee and zwave chips that will broadcast signal, connect to respective devices, send and receive commands from those devices. Also onboard the ESP32 which has wifi and BLE integrated allowing me to send and receive those messages/commands to the Cloud. The only aspect I'd like to focus on here though is the full PCB integration of ESP32 and those chips, if something like this is possible, recommendations/drawbacks. I have the hardware pieces used below. *As a note, I'm looking for hardware design and protocol implementation here which does take a lot of detail, not looking to purchase and use an already exist...

    $51 / hr (Avg Bid)
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    This project is two fold as you look at the schematic- piezo and metal tank. The suggest is made of placing a second inductor across the primary of the transformer to improve the driver's efficiency . The value of the inductor is empirically picked to minimize power consumption (it offsets some of the capacitance of the piezo transducer. The optimization need to function with any piezo at the 63kHz range Also we consider a push/pull transformer arrangement driven by a similar microprocessor arranged input. This is typical of higher power ultrasonic drivers.

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    NEED TO MAKE DESIGN A PCB HAVING 4 INPUT CHANNEL AND 5 OUTPUT CHANNEL WITH A 300 LINES MICROPROCESSOR WITH GPS AND 2G SIM MODULE, WIFI AND CAMERA. NEED A NANO CIRCUIT.

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    I have a small OEM circuit board I would like to reproduce. I would like someone to produce a file i can send to a manufacturer who can produce the board and solder the components. It requires some editing from OEM in that the LED things get too hot and un-solder themselves. They would need to use something different in the new board or better cooling or both.

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    We are trying to develop a prototype for our idea. We require a skilled worker to help us use the arduino and microphone to consult on our basic design and help us improve it. We would like to pay per hour of consultation. The consultant should ideally be based locally in London and have knowledge of microphones, arduino hardware and circuit design.

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    Local
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    Hi Viswanathan R., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Hi Narayanan Nampoothiri K., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Hi Sumit K., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Hi Shanmugaraj K., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Hi Narender S., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Hi Arumugam P., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Hi Amburose Sekar S., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Hi Prakash A., I noticed your profile and would like to offer you my project. We can discuss any details over chat. we have to write a micropyhton code and integrate a zigbee gateway so that the data can be sent to Digi Remote manager, plant is at Puducherry and the job entails going to plant for 4 to 5 days , travel and stay will be paid by us

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    Simulink model of Chua based memristor chaotic circuit. I am sharing the working file and the fine to be debug. Expectation: The below matlab code should provide synchronization. plot(out.m); hold on; plot() Reach me for further queries.

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    PCB mod 4ch-amp2022 22 hours left

    We need to make small changes to our existing circuit board by replacing a solder pad footprint with a header (board mounted connector). Find the necessary new part design files and modify our existing circuit board project. We will provide most of the new part information as well as our existing Gerber and Eagle files. You may need to produce a custom footprint for the new part. You will provide a package of revised working files for us to send to our PCB maker. Details:

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    ...number generator circuit designed and built for my research project. The RNG must have the following characteristics: The circuit must be capable of delivering and maintaining a steady stream of randomness The circuit needs to be interfaceable to a computer system via a standard USB port The circuit must be capable of delivering randomness at a rate adjustable through the USB serial interface. The circuit must be biasable, The bias should be deliverable via the USB serial interface. The bias should affect the RNG non-deterministically. The circuit must be powered using the USB port. Other requirements are flexible. Ideally we will have the opportunity to discuss my requirements together before you perform the work. Acceptance criteria con...

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    WT (wind turbine) model must be made in DPF software (DiGSILENT PowerFactory software) according to international standard IEC 61400-27-1. In DPF wind turbine type 4B template (Which is already available in software) will be used and modified internal controller parameters to...ride through) events. I am quite familiar with the DPF but I need most of the help regarding technical knowledge but as we have to make model in DPF then it is also necessary that you have experience with DPF software. The freelancer must be familier with the DiGSILENT power factory software and also with the building wind turbine model and tune the internal controller to swith ON and OFF circuit breaker during HVRT (High voltage Ride through) and LVRT (High voltage Ride through) events Kind regard...

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    We have an one PCB with ATMEGA32 Controller. We want to be upgrade this with STM32 Controller. DC Power Supply will also be upgraded. Sensor, Communication and Amplification part will also be changed.

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    ...Driving Assistant Professional which incorporates an improved adaptive cruise control for the city, autonomous emergency braking at intersections and more efficient lane keeping assistance than before. The engine range of the BMW X4 remains unchanged except that the xDrive30i petrol engine is now hybrid miniatures like the diesel blocks. The electric starter-alternator powered by a dedicated 48 V circuit allows you to benefit from a temporary support of 11 HP while consuming less. XDrive all-wheel drive and eight-speed automatic transmission are standard on all trim levels. The section level petrol engine is still supplied by the X4 xDrive30i which loses 7 HP to offer 245. The X4 xDrive M40i still shows 360 HP. The X4 M Competition remains strong point with a 510hp six-cylinder...

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    Hi, We need someone who can design electronics for our product. You need to review product details, select sensors according to need and design electronics and PCB for it. We also need same person to do firmware and testing for it. We need reasonable quotes please because we are not new in this field. Further details will be shared with selected freelancers only. Thanks.

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    ...). This should be used as string object as well in Xpacker. Output is a blender file that can be exported as .fbx with all the right textures to work in Xpacker. It should be made of 4 tiles (white-red-white-red) so I can change the colours depending on the circuit. • 1 Grand stand with roof to be used as main stand in a circuit • 1 simpler open metal stand • Pit building with garages and offices on top (as inspiration you could use this ) It should be a string object with a “start” object (i.e. the glass offices of the picture), a “pattern” object that can be used as string, which would be the garages itself, and an “end” object (i.e. parking for the safety car). Attached picture of

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    I need to ship you these circuit boards for diagnosis. I have an OEM gear selector for an ICE powered car. It has 5 buttons and associated LEDs. It normally outputs a CAN or LIN bus based signal. But I just need it to output a "to ground" signal from each switch. What I would like to do is ship you the circuit boards and a spare connector with the pins. I need the LEDs associated with each of the 5 switches to illuminate when each switch is engaged, and the unit sends out a “to ground” output from each of the 5 functions, via the connector leads in the attached image. I tried to just solder on leads to the switch contacts of the larger board, but the leads and solder would not adhere. One can see in the image where the large board was burned at the ...

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    I connected a Tuya Zigbee Smart Switch with a Tuya Zigbee(3.0) Wireless Gateway through Smart Life App, and it works perfectly with the app (ON/OFF). I need someone to help me to control the same Tuya Smart Switch with my ESP8266 through the Tuya Zigbee Gateway, without using the Smart Life App. (ESP8266 and Tuya Zigbee Gateway are connected to the same wifi network, so there is no need for internet) So the command should go from my ESP8266, to the router, to Tuya Zigbee gateway to the Smart switch, as shown in the attachment. If you do not have the Tuya hardware, you can connect to my Computer using Anydesk to download to my esp8266, then we can check it if it works with Tuya

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    hen an IGBT or MOSFET are fully "on" they are known to be saturated, when they exceed their maximum current ratings they are known to "over saturate" which will eventually cause failure of the device. While IGBT's and MOSFET's are used for very simi...device. While IGBT's and MOSFET's are used for very similar applications it should be noted there are two main differences, the MOSFET tends to lean towards high frequency low-power switching whereas the IGBT leans towards lower frequency and harsher switching conditions, these are just the common assumptions. Due to the fairly ruggedised features of the IGBT they normally have around a 10us short-circuit capability and a higher voltage rating which makes them a lot easier to protect. The MOSFET ...

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    need e fast short circuit protection for the ac power line

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    Short protection and over load protection for ac alternative current ca

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    Hi, I am a professional IT specialist and I would like to hire someone who has broad experience with wireless networking, cellular networking, and ZigBee networking. The primary task would be to build an Omnet++-based Zigbee network model that will connect different IoT devices and smart meters in the simulation. I will pm you more details.

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    I have a simple teensy sketch. I have supporting schematic and hardware. I have compiled to best of my knowledge but I am doing something wrong. I am trying to put together but somehow cannot seem to get it working. I would like someone to guide / assist me in what I need to do to get the project working. I would also like someone to modify the code to port from a teensy to esp32/8266. For a professional this will be easy work. For me I don’t have the attention span. I am confident with soldering circuitry and simple code. But I am not a c+ nor a micropython expert. So I require the services of someone who is competent in arduino, teensy, c++, python and circuitry / pcb. Also have another project looking to reverse engineer a pcb where to the successful applicant will receive a n...

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    Hello Looking for PCB Engineer to create a GERBER File for the circuit board as shown on Pages 7 and 8 of the attached PDF

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    We have finalized the QMK Firmware for one of our products and we are looking to finish the last piece which is the RGB Mapping. A simple job that will require 1-2 hours at most if you are familiar with C/C++, QMK, and Circuit diagrams.

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    Hi Chi Fung Brian F., I am looking for a freelancer who has experience in electronic design in Hong Kong. I noticed your profile and would like to offer you my project. We can discuss any details over chat.

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    Problem statement: creating a convenable circuit that satisfied these specifications – Supply voltage: VDD=2.2V – VIO=5.5VTemperature:-40C 25 C to 125C Operating Mode :Program/Program Verify-Read/Read Program. –Program Verify Read:10k (PVR Mode) – Read Mode :5k {Read_Programmed Cell& Read_Uprogrammed Cell – Current :<100uA. (Decreasing current from 168.4uA to 100uA – checking the sensing resistance and read current About Sensing resistance : Lower than 10K(PVR Mode), Lower than 5K(Read Mode), at all corner simulation About Read Current: Lower than 100uA at all corner original circuits (Block diagram) read current maximum value is 168.4uA, its over limitation creating a convenable circuit (Block diagram) that make the ...

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    Problem statement: creating a convenable circuit that satisfied these specifications – Supply voltage: VDD=2.2V – VIO=5.5VTemperature:-40C 25 C to 125C Operating Mode :Program/Program Verify-Read/Read Program. –Program Verify Read:10k (PVR Mode) – Read Mode :5k {Read_Programmed Cell& Read_Uprogrammed Cell – Current :<100uA. (Decreasing current from 168.4uA to 100uA – checking the sensing resistance and read current About Sensing resistance : Lower than 10K(PVR Mode), Lower than 5K(Read Mode), at all corner simulation About Read Current: Lower than 100uA at all corner original circuits (Block diagram) read current maximum value is 168.4uA, its over limitation creating a convenable circuit (Block diagram) that make the ...

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    I want a circuit which will change speed of Mixer Grinder (food processor) with numerical Display. Attaching a photo for your reference

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    Hi Muhammad B., We are looking for a electronics Engineer to assist us with a project. We have designed a system which uses RF to pass a reading from one circuit board to another. The reading is a measurement taken by a sensor. The second circuit board is hard wired to a 10" nextion display. is this something you can work with? If it is then lets discuss the project further. Thanks Jason

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    ...project is to design a gate circuit using transistors. Refer to attached example signal. The raspberry pi sends an input signal to the gate circuit. Another input from the raspberry pi called GPIO controls the gate circuit with 3.3 volts. When the GPIO signal is HIGH, it will open the gate and allow a 3.3V square signal to pass to the output (input ). When the GPIO signal is LOW, it will shut the gate circuit and output will be 0V. Circuit must be tested in LTSpice using the attached 'Input ' for the input signal, and using the attached 'GPIO PWL ' as the GPIO signal. The end of job will be complete when you send a satisfactory and working LTSpice model to me. Simulation can be terminated at 3 ms stop time. You can util...

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    We have an existing design that due to part being obsoleted needs to be redone. The current design utilizes and 8 bit Freescale processor and we would like to have the new design done with the Arm processor. We are looking for someone with circuit and software design.

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    This project requires you to have knowledge of basic circuit, mesh analysis, rectangular and phasor forms

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    We currently have 4 different Android apps that we want to combine into one. I have attached 20 of the apps. They were written by someone with little experience and have various bugs. The GUI is also very messy. The app is intended to setup and control Zigbee enabled luminaires with a Mesh network. Please bid "I saw" as the first sentence. Otherwise, your bid will be ignored.

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