AVT2962 A +

This project shows how modern electronics help a chemist. The device is used to measure the concentrations of colored substances or those that have colored reaction products. The phenomenon of selective absorption (absorption) of radiation with a strictly defined wavelength was used. Its source in the present glass is the LED diode. In comparison to other sources, the spectrocolorimeter using it will have lower sensitivity and a smaller range of the linear relationship between absorption and concentration.

The device is especially recommended for inquisitive chemists-electronics

Selected parameters:

• source of radiation beam - LED diode
• the ability to change the LED (color) depending on the substance being tested
• control and measurement - ATmega8 microcontroller
• reading - LCD display
• zeroing function
• additional function - UV absorption test for sunglasses
• power supply - 9-12Vdc
• a printed circuit board, programmed layout and documentation in the set
  
  Detailed description in EdW 11/10