Design and development of a microcontroller based instruments

Closed Posted 5 years ago Paid on delivery
Closed Paid on delivery

This project aims to help re-design an instrument for testing moisture content in foodgrains based on AT89C52 microcontroller to Atmel SAMD21 Cortex M0 microcontroller

The analog design has been re-used from the previous working instrument.

Working Principle:

The resistance is measured by applying high voltage across foodgrain sample. The resistance of the food grains to the current depends on the moisture in it. Once the resistance is known, the moisture is measured using certain formula derived using graphical observation method.

The high voltage is applied using a step up transformer and relays for a duration of around 7 seconds.

The moisture result once obtained can be stored in internal memory, external USB pen drive or SD Card.

The result can also be printed on a serial or Bluetooth Printer. All the process is controlled by a keypad and observed on a 16 x 2 LCD.

Tasks completed till date,

Interface of USB, SD Card, 16 x 2 LCD, 4 x 5 Hex Keypad, ADC and Relays has been done. Schematic design and PCB has been done and tested for a basic moisture reading accurately. Software framework for the menu flow has been done using state machines.

Testing of USB, SD-Card interfacing and External I2C has to be done yet, Calibration code has to be completed. Storing the reading and retrieving from the memory has to be done. Battery management hardware is to be tested. Bluetooth and serial printing has to be completed. Integration of the modules has to be done. Code for menu driven operations has to be done .

Freelancers from bangalore are preferred.

Electrical Engineering Electronics Microcontroller PCB Layout

Project ID: #17086863

About the project

11 proposals Remote project Active 5 years ago

11 freelancers are bidding on average $511 for this job

ahmad5857

Hi Sir, We have read your project sir, we are very best in cortex M0 based mcu programming, lets talk to us on it. We are professional engineers and developers who do such projects from the last eight years. More

$600 USD in 18 days
(46 Reviews)
6.7
mechatronicsengr

Hi, I hope you are doing well. I have expertise in embedded system programming and development. I have worked on Atmel AVR and ARM controllers and worked on all the components you have mentioned in the descriptio More

$631 USD in 10 days
(70 Reviews)
6.7
MIKY4227

Senior ENGINEER has more of 40 years’ experience in this profession, developing Hardware and Software Expertise in video processing and associated simulation and evaluation tools and methods, communication I2C, I2S, SA More

$833 USD in 10 days
(53 Reviews)
6.5
usaaamaa

sir i have done alot in this microcontroller field and i am sure i can do this as it is software based so do hire me for this it will be pleasure for me to do this

$250 USD in 4 days
(4 Reviews)
2.8
clive79

Been working with the 8051 microcontroller in embedded projects for the past 10 years

$555 USD in 15 days
(0 Reviews)
0.0