Welcome to the Real World. What to do ? Input from the mangonel sensors Input expected by the software.

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Presentation transcript:

Welcome to the Real World

What to do ? Input from the mangonel sensors Input expected by the software

How to do ? Input arrives from sensors Logic circuit combines and inverts inputs to create a single pulse PICAXE measures the pulse duration and outputs the value to seven segment displays

NAND gate Input A Input B Output

Basic Logic functions (gates): AND OR NOT

JK Flip-flop

Pulse width meter circuit diagram

Model on a breadboard (find TTL or “Transistor–transistor logic” in wikipedia )

Work for today No connection DOT means wire connection

Identifying a microchip

Tips and tricks: Be tidy: Keep the wires short. This improves reliability. Wire Colours does not affect the performance a circuit, but does affect the performance of a person trying to understand it. Connected wires are marked with a dot. Remember about the power supply. –Do not forget to connect –Do not forget to switch OFF when making changes.