Design an Analog Universal Input Signal for ADC

$30-250 USD

Concluído

Publicado

há mais de 5 anos

$30-250 USD

Pago na entrega

The freelancer has to design an Analog Universal Input for an A/D converter, of minimum 16-bits resolution. This analog circuit must have the following features: - Programmable input: Pt100 RTD and thermocouples type J, K, T, E, N, R, S, B. - Two-wire loop powered 4-20 mA output - Voltage input of 0-10, 0-5VDC - Linearized output and cold junction compensation for thermocouples. - 2 or 3-wire Pt100 with linearization. - Isolation: 1500 VDC. - Programmable working range by Bluetooth with App on Android/iOS - Manual zero (offset) adjustment - Accuracy: ±0.2% full scale for Pt100 and 0.3% max. of FS for thermocouples - Temperature effect: 0.003% SPAN/°C - Working temperature: -40 to +85 °C - Programmable burnout upscale or downscale sensor failure protection Any improvement in the features are welcome!

Android

Circuit Design

Electrical Engineering

Electronics

PCB Layout

ID do Projeto: 17959295

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8 propostas

Projeto remoto

Ativo há 6 anos

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@chuledeco

Hello! Thank you for inviting me to offer. I made a design for reading five K-thermocupes and reading the temp value in a PC by Bluetooth. I've used a MAX31855 to read the TC but is a 14 bit ADC. I suggest using a MAX31856 which have 19bit resolution and cold compensation for any standard thermocouple. I do not understand why do you need zero compensation. Is for setting a base and read changes in the temperature? PT 100 and 4-20mA are not critical because the signal level is easier to handle. The time required for doing this job is approximated. So we have to talk more about the project. I can help with analogue design, digital design, firmware and PCB design too. I'll be ready for a talk with you, Regards.

$40 USD em 45 dias

5,0

(33 avaliações)

6,6

8 freelancers estão ofertando em média $133 USD for esse trabalho

@arrijal1992

Hi, we can use smart ADC devices from analog Devices for this project. it includes microcontroller with cortex m series. so, we don't need another external microcontroller, just add Bluetooth module. and we can populate another circuit like your requirement. just message me over messenger and let's discuss the detail of this project. I will use eagle / Kicad for this project. I have designed PCB since 2012 and has done lot of project for Hobbyist, Robotic, Industrial, IoT, and Military application. I always following design vendor's guide when comes to critical application like ADC to achieve best performance. Let me know your response, and let's finish this project together. Best Regards, Rijal

$200 USD em 5 dias

4,5

(133 avaliações)

7,2

@Valuesolutions

Hello, i have read the details provided..please contact me to discuss more on the project deadline and some other few things

$150 USD em 3 dias

4,1

(20 avaliações)

5,5

@oualidettaziti

I am a future engineer in embedded system (electrical engineering ) I worked on a lot of project using electronique and programing so I am the best one for that project

$111 USD em 3 dias

0,0

(0 avaliações)

0,0

@jc5417

Good day I am electronics engineer graduate. We have a project in our college related to your job posted. I can help you with that. Relevant Skills and Experience Proteus and programming

$222 USD em 8 dias

0,0

(0 avaliações)

0,0

@KbnEngineering

Thank for the invitation Do you want just the design (schematics) ? And you need that this multipurpose circuit is controllable from a Bluetooth app ?

$155 USD em 3 dias