Inventions for GravitechThai Co., LTD (Internship 2017)

At GravitechThai, Tawan work as research engineer. This position invent maker-invention. The purpose is to shows the application of company maker-parts (show below).

1) Flow Meter Sensors: a review

Flow meter sensor commonly used to measure liquid flow (water, oil). Inside of those kind of flow sensors consist of turbine and hall effect sensor. Hall effect sensor count revolution of turbine create rotational revolution count signal. Those tutorials below will show instruction to use the signal transform to water flow rate.

Water Flow Sensor/Meter (YF-S201)For instruction, visit HERE (disappeared since 2019). In this link contained equipments, step-by-step instruction, and software code (as I am code author; now still available).

Water Flow Sensor/Meter (YF-S401)For instruction, visit HERE (disappeared since 2019). In this link contained equipments, step-by-step instruction, and software code (as I am code author; now still available).

2) Weight Machine: the demonstration of DC motor drive board performance

Weight machine is proposed to show performance of high-current DC motor drive board, CEI motor drive. After CEI motor drive was passed the QC test by our R&D engineer team (including Tawan), the company need to promote this product in Startup Thailand 2017 Exhibition. This project is established!Weight machine constructed from welded steel rectangular beam. Top of the frame mount high torque dc motor. A heavy-weight cylinder moved up and down through cable which mount to pulley at motor. High-current from motor driver board could supply motor very well, controlled by microcontroller (Gravitech Lambda Board).

3) Candy Vending Machine: IoT vending machine controlled by user like from Facebook fanpage.

This candy machine is proposed for demonstrating how Internet of Thing device could interact with people. The machine feed candy when detect that user like facebook fanpage while press confirm switch in front of machine.

Working architecture base on Internet of Thing concept. The Controller receive like quantity from Facebook fanpage through Facebook’s Fanpage API. When like quantity is increase and confirm switch in front of machine pressed, the machine send open signal to servo motor which pull piston rubber-brake out, create vending wheel rotate one step. A few candy fall down to user hand!

This video demostrate turbine and gear mechanism.

The machine consist of vending wheel which it feed a few small sweets, turbine which it power generated from turbine, and gear box which linked between vending wheel and turbine and reduce rotational speed (enhance torque), and also the rubber-brake which is command vending wheel feed sweets for user when facebook fanpage is liked.