Thursday, December 25, 2014

Arduino Project : OhmMeter using Arduino with Auto Ranging Feature Circuit and Listing Program

Robometricdiagram. - We will continue to give reference about Arduino Project from CircuitsToday blog. In this time we will show you Arduino Project : OhmMeter using Arduino with Auto Ranging Feature Circuit and Listing Program. The measured resistance is displayed using a 16×2 LCD display. The circuit is sufficiently accurate and uses minimum number of external components possible. Before going into the details of this project, lets have a look at the basic resistance measurement method. The circuit of OhmMeter using Arduino with Auto Ranging Feature like in figure 1 below.

Circuit Schematic

Figure 1. OhmMeter using Arduino with Auto Ranging Feature Circuit (CircuitsToday)

Component List
  1. 16 x 2 LCD Module
  2. Resistors
  3. Variable Resistor
  4. LED
  5. Arduino UNO
  6. Zener Diode
  7. See all about component list in figure 1 above

Description

Circuit schematic like in figure 1 above is OhmMeter using Arduino with Auto Ranging Feature Circuit. Full circuit diagram of the auto ranging ohmmeter using arduino is shown in the figure above.  Digital pins 1, 6, 7, 8, 9, 10, 13 of the arduino are used to switch the input resistors R1, R2, R3, R4, R5, R6, R7 respectively. Resistors D1 to D7 are used to prevent the back flow of current through the corresponding path.  D8 is the power ON indicator LED. POT R10 is used for contrast adjustment of the LCD. Resistor R9 limits the back light LED current.

For more information about the article and also full listing program using source link below easily.

Source Linkhttp://www.circuitstoday.com/ohmmeter-using-arduino



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