Category: The AND Logic Gate

How can the photocell be wired to analog A0 and be used as a digital input pin? Figure 6-10. The Arduino AND Logic Gate circuit schematic.

With the Arduino AND Logic Gate built on the MakerShield, it is time to upload the sketch. Example 6-1 operates the green LED using a pushbutton switch and a photocell. Here are the steps you’ll need to follow: The Arduino AND Logic Gate will turn on the LED when the photocell is covered and the pushbutton switch is pressed. Releasing…

We’re going to replicate the AND gate using an Arduino. To make the circuit interesting, we’re going to use a photocell to replace one of the pushbutton switches from Figure 6-1. In Figure 6-6, we see the Arduino AND Logic Gate, with the LED turned off. Placing a piece of tape over the photocell (to allow no light into it,…

The AND Logic Gate is a computer circuit that outputs TRUE if the two pieces of input data have the same state as each other. Digital electronics have two binary states: TRUE or FALSE. The electric circuits used in digital electronics to build computer logic gates will either be closed or open representing a TRUE or…

TECH NOTE In digital electronics, a TRUE state is when a data bit is set to 1, or an output pin is set to +5 volts, or a switch is closed. A FALSE state is when a data bit equals 0, or an output pin is set to 0 volts, or a switch is open.

Two Pushbutton Switches in Series The AND Logic Gate is another computer circuit used to make basic decisions with electrical input signals. Building the AND Logic Gate requires wiring two pushbutton switches to electrical contacts in a chain or series circuit. The AND Logic Gate’s output decision is based on both parts of the input…