Pressing the pushbutton will close the switch and allow +5 volts DC electrical current to flow through the circuit. The Arduino reads digital pin 6 to determine if the pin is receiving +5 volts (i.e., set to HIGH), or if it is not receiving any voltage (i.e., set to LOW). The Arduino takes that information and… Continue reading Circuit Theory
Category: A Logic Tester (With An LCD)
Upload the Logic Tester Sketch
With the Logic Tester built, it’s time to upload the sketch. Example 16-1 operates an LCD using a pushbutton switch, a transistor, and two fixed resistors. Here are the steps you’ll need to follow: Once the Logic Tester sketch has been uploaded to the Arduino, the LCD will display a message, as shown in Figure 16-1. Take the long jumper… Continue reading Upload the Logic Tester Sketch
Let’s Build a Logic Tester
Building this tester requires the use of an LCD. If this is your first time using an LCD, I suggest reading. For help adding the 16-pin male header to the LCD, see Figure 14-2 and Figure 14-3. The 10KΩ potentiometer’s center pin is wired to pin number 3 of the LCD. The potentiometer’s remaining pins should be wired to +5VDC and ground.… Continue reading Let’s Build a Logic Tester
Parts List
Figure 16-1. A Logic Tester with an LCD
Introduction
The Logic Tester project in allowed you to check the digital data values the Arduino uses to control motors and LEDs. The tester’s two LEDs offer a quick way to see the digital data. In this project, you’ll make an awesome change to the tester by displaying “HIGH (1)” or “LOW (0)” data messages on an LCD.… Continue reading Introduction