把teensy2.0作为midi设备，从teensy2.0接出八个旋钮或推子控制音乐软件音量，有两个teensy2.0，一个发送，一个接收，也就是一个teensy2.0插在电脑上，另一个teensy2.0(接8个音量旋钮或者推子)通过无线(xbee)发送到这个teensy2.0(作为midi设备插在PC上)。 因此我想请大神帮我写这两个teensy2.0的代码，一个是发送代码一个是接收代码。 下面有一个文件是别人做好的代码，但是只能控制一个旋钮或推子(如果按照这个事例修改为控制八个旋钮或推子的话，就会互相干扰)的音量，我要的是八个。仅作参考
Overview I'm making a tracked tank based robot using Ubuntu 18.04 (Bionic Beaver) and ROS Melodic (Robot Operating System). The robot is tethered with copper & fibre optic cable. All the electronics has been purchased & is currently being assembled. Communications On-site support is available by means of mobile, Whatsapp, Skype & email. Hardware All hardware is available & has...
Design PCB for Laird BL652 chip with temperature sensor (MLX90615) and rgb led (neopixel) and battery + charging cirquit (micro-usb) (and if possible also program the chip via usb). The sensor and led need to be on a seperate board, connected with small cable (+/- 60mm distance). Goal is to make a wearable for artistic/scientic research. First make 1-5 test PCB’s by your design, if everyth...
looking for someone with experience to design a board with the Nordic nRF9160 LTE modem. smallest form factor
1 Semiconductor fingerprint sensor 2 Intelligent update function of fingerprint information,Constantly learn and store user new fingerprint information. 3 Rated voltage:4-8 pcs batteries power supply Have a external power interface(DC-5V;Micro USB interface) 4 There are 1 buttons on the back of the door battery box:Initialization(Resume out of the factory)Key.
I need two simple (!) Arduino C++ sketches; the first sketch is for an Arduino Mini Pro (Atmega 328P, 8 MHz, 3.3 V) connected to a Lora Hope RFM95W radio module (915 MHz) and with 3-wire capacitative water sensor connected to the Mini Pro A0 pin (+Vcc 3.3 V + GND). The sketch for the Mini Pro must sense once each day (to save battery) the presence of water at the connected water sensor and then se...
Build IOT device to monitor temperature and position. For the first prototype, use comercial board (like Arduino, Linkit One, ESP, etc) with - DS18B20 temperature sensor - GPS - GSM/3G to send data - WiFi (optional) - Battery Data will be send to our server, we could discuss best way and the periodic to send it (better battery life versus accuracy)
Implementation of Fractional-order function (S^e) on FPGA using VHDL. I don't want imaginary freelancer, please, please.
My company provides mobile hearing testing to industrial sites around the country. Our computer interfaced audiometer uses outdated electronic components including the Intel D8741A microcontroller. My vintage programmer has an issue and I need to get a small amount of these chips programmed.
We have to set up a temp retail store for a major brand in Connecticut.
Looking for [登录来查看链接] engineer who done his/ her degree in [登录来查看链接] in electrical. I need a Convertor for using in electrical vehicles for 48v to 12v.
Требуется написать код для stm32f429igt6 для воспроизведения wav файлов c microsd карты посредством DAC.
I need you to design a programable NMEA buffer PCB. It should be in 122mm x 110mm. PCB should receive RS-422 data and convert it to CMOS using transistors and opto couples and receivers. Outputs RS-422 data to multiple device. All input, output and power ports should be galvanic isolated from each other. Electrical connections should be according to NMEA standards(check "NMEA-0183 Information...
ESP8266 Audio Interfacing Circuit Hardware Requirement: ESP8266 controller (model 12F with 4 MB flash) dev board 8 ohm 0.5 Watt Speaker or 6.5 ohm 1W speaker to drive for mono audio file Speaker interfacing circuit PCB to be developed (working with dev board via few jumper wires) PWM signal to be used and not I2S .... Supply Voltage will be 3.7V from battery, no 5V will be available.. Soft...
The Goal is to send and Receive data on an webbased MQTT server. The µC will be PIC18F Microchip (ideally 18f4685 or approx.) uart connected to ESP12 module (ESP8266) (At command) MQTT library will be compatible to versions 3.1 and 3.1.1 of the MQTT protocol (or upper). Establish/manage Wifi connection. / Establish/manage MQTT connection. MQTT data sent or received will be sensor value and s...
BLE or low energy bluetooth project ( Hardware ) We want you to chosse right BLE for our project. Its portable product so Advertising mode current should be minimal and BLE chip should have MCU and Watchdog timmer inbuilt.
Hello there. We would like to measure the pH and conductivity of water by using Arduino and Rasberry cards and ph and ec probes. We want to monitor the values on a 4-7 inch screen and determine certain set values. We want to get open-closed or 4-20ma proportional output from the cards according to the specified values. Can you help us with this kind of work? This is an example and we will have a l...
I want to remotely monitor a 4-20ma signal from a level sensor remotely on my android mobile. There is internet avaiable (rj45 ethernet cable) at the installation site. I have an arduino already with ethernet shield.
I need Led uv light intensity control using Arduino. UV is turned off and on by optical sensor t5500. UV light power is independent. The detailed task will be discussed when recruiting.
*** OVERVIEW *** - Ten US dollars per hour. - One hour per day (or per night). - You will help me design, code, and develop an IoT product using MicroPython running on an ESP32 microchip. - You do *not* need any experience with... ESP32, microcontrollers, electronics, electrical engineering, mechatronics, Arduino, PCB, or circuit design. - If Freelancer.com prevents you from bidding on this p...
Need a dashcam built with proprietary software. NDA signing required.
We are looking for an expert that has done magnatron/microwave ovens. We have a specific small area microwave (100mm x 100mm x 50mm) need and this needs a custom designed solution to make it competitive product. We are looking for someone with microwave oven design and manufacturing is desired.
we have error at the monitor as the attached photo is A 202 CODE axis servo error i want to know how can I find and solve the problem , what is the problem in the servomotor where we change the encoder .
Hi we are a technology business, looking for a experience engineer to design a 2.4GHz doppler radar transmitter with 2-3MHz bandwidth. We have identified LMX2491 for generating the required signals/bandwidth. More info will be given as required.
YOU NEED TO SEND 3 Fully working prototypes, Schemetics, PCB layout , Bill of materials, using EagleCAD software. PRODUCTION COST should be AS LOW AS POSSIBLE , with low power consumption The Project is to Make Bluetooth device (20mmX30mm) with the following spec: Bluetooth device that takes 2 CONTROL variables 1- Renaming Bluetooth AT commands 2- Saving command characters in ROM Programmi...
its computer-controlled systems for automatically placing and retrieving loads from defined storage locations. I used Arduino, Some sensor, motors and mechanical system in this
6 axis robot development, It is an existing project. Experience with STM32 F411 , STM32 F7 Series. Trinamic TMC5160, TMC4330. RS422, RS485 with SP3070E-78E Family. Magnetic Encoders AS5147.
We are an escape room company looking to build a long-term working relationship with someone who is well-versed with electronics - big and small. preferably someone who knows how to work with arduino/rfid/sensors and knows how to code. UK ONLY APPLICANTS PLEASE
PCB board for charging 3,7V LiPo cells with downscaling from 5V and 12V for charging and upscaling to 5V and 12V discharging, incl. over- and undercharging protection including an interface to use the contacts from the battery to operate an LCD-Device. Autosensing USB-A and USB-C sockets to be integrated. The detailled task will be released after signing an NDA.
I am searching for a way to create some custom commands in Marlin or grbl to make use of external hardware connected through RS232 to Arduino while printing.
I want to make pcb for transformer, SMPS, motor drive, plc program.
Hola Necesito una solución económica para un sistema de engrase para cadenas de arrastre. Para ello, pensé en una solución IoT basada en Arduino. Dejo a la elección del desarrollador la elección del hardware. Las especificaciones básicas son las siguientes: El controlador que propongas deberá contar impulsos (cada impulso es un eslabó...
We are looking for an Electrical Engineer to provide a design review / second opinion of a PCB schematic prior to sending off for production. This would be a fairly small job consisting of a meeting to gain an understanding of the overall application and then a review of the design itself.
Hi I need a library to use FT801 with STM32G070. The library should using HAL to commuincate by SPI
to set up a HUD system showing details like speed, distance travelled, impact record, ability. to notify incoming call and ability to answer them using mic and speaker modules, Bluetooth connectivity, music playing and navigation assistance with route Info to be displayed on a LCD device with a battery back up for 6 hours, in minimal form factor
Hi, I want ABB VFD communication protocol expert. details in chat please bid if you understand RS485 Communication by arduino to control another device. thanks
Let there are 6 NodeMCU ESP8266. Each NodeMCU in outdoor area and battery powered. Let there name be T1-R1, T2-R2 and T3-R3. Ti device generates wifi with some ssid and paasword and the respective Ri pair gets connected to its Ti device using that ssid and paasword. I have log the signal strength of each pair twice per second in following format (time, signal strength). Thus I will have 6 readin...
Need to design firmware to build MQTT gateway with following details [登录来查看链接] for STM32 + sim800 + SPI flash memory 2. Gateway need to publish data received on uart of STM32 gate way from mother board 3. Gateway need to subscribe topic and when data recieved send that data to mother board via uart 4. Gateway need to check atleast once/twice a day for new firmware available on server. 5. If new fi...
I need you to design a main PCB board to operate two-wheel BLDC hub motors and a few auxiliary components e.g. lights. You will also design a small joystick logic to talk with the main PCB board. So we want to use as many pre-built electronic modules as possible to simplify the design task. All the pre-built modules have already been selected. Specific model numbers will be provided in private ch...
Merhabalar, Endustriyel alanda urettigimiz cihazlarimiz var. Cihazlarimizin uzerinde oransal,on-off vanalar, analog sensorler, elektrik motorlari gibi ekipmanlar mevcut ve belirli bir senaryo ile calisiyorlar. Ekipmanlarda genel olarak Siemens Plc'ler kullaniliyor ve kontroller analog swichler ile kontrol edilmekte genel olarak Hmi arayuzleri yok. Biz bu ekipmanlari daha uygun maliyetli ardui...
I explain a little the project, I currently have a door to which they placed an electromagnetic lock. To open the door, people must identify themselves in 2 registration positions, after this, the security guard can pass his hand over the no touch button and release the lock so that the person can enter. I enclose the manual of the button and the lock, I WILL NOT have any biometric access control ...
We need to implement an ultrasonic data transmission between a Computer and a board (IC = STM32, or nordic, ......) On computer must be only software to modulate the data in audio then on board only need to demodulate the audio in data. On the board we get the data from microphone.
Basically need step by step instructions on how to build and install yocto image on beaglebone green wifi. Something of the sort - but need to talk with you before listing exact details - we have a few questions. This project will create detailed instructions (line by line) for: - Latest stable Debian - Beaglebone green wifi (must be this model) - Yocto latest version (or latest supported for...
Negotiable price/charge I am looking for a person who have good experience in PLC- parts selection( contactors, relay, motors( servo, linear), wire sizing, wiring, programming and giving training. I have a project with 2 linear motors, 1 fluid pump, two servo motors. I am looking for someone who can help in: - parts selection including PLC ( with HMI) for purchase - help to train someone onlin...
Looking for a skilled person who is capable of designing / making / consulting on a portable Antenna that will be highly powerful to catch all the IMSI number within 10km radius area. In order to complete such a task, the bidder should have strong knowledge of how LTE networks and signalling. Bidder MUST have an understanding of telecommunications and the different cell bandwidths that are curren...
I am currently using Altera DE2-115 FPGA board to configure it using Quartus 17 lite edition software and write the code in VHDL. We have to use QSYS, and NIOS II for Eclipse to write a program in C and to run the board. I am seeking some help in building this mini thing.
Looking for someone to create an Arduino [登录来查看链接] file and setup a variant.c and variant.h for a custom board that uses the SAMD21J18A. Then possibly help with customizing some firmware to load on the device from the Arduino IDE.
preciso desenvolver um projeto de controle e monitoramento de uma máquina utilizando uma placa Arduino UNO R3 + placa Ethernet W5100. o projeto é o seguinte: - receber dados da máquina - enviar dados para um servidor web - ter gráficos e relatórios dos dados - enviar avisos via Twitter (SMS) caso algum valor esteja fora dos parâmetros preestabelecidos.
