I want to make a fast, stand along, resistance probe that will display the results on some sort of LED display. (7-segment perhaps.) I only want to measure 0-100 ohms, or possible 0-1K.
You could use a small MCU like a paralax or Arduino to set up an RC circuit to measure the time constant and display the resistance. You will need a good quality capacitor or inductor so you know the value to divide into the time it takes to charge and discharge. After that it is a simple matter to send the output to a serial LCD display.
You could use a small MCU like a paralax or Arduino to set up an RC circuit to measure the time constant and display the resistance. You will need a good quality capacitor or inductor so you know the value to divide into the time it takes to charge and discharge. After that it is a simple matter to send the output to a serial LCD display.
