The DigiRule is a 15cm (6") interactive binary ruler. Not only does it allow you to draw straight lines - it also has the following built in digital functions:

Seven Logic Gates

• NOT Gate (Inverter)
• OR Gate
• AND Gate
• XOR Gate
• NOR Gate
• NAND Gate
• XNOR Gate

Four Flip Flops

• SR Flip Flop
• JK Flip Flop
• Data Flip Flop
• Toggle Flip Flop

Plus - a four bit binary up/down counter.

The ruler divisions are given in binary format with imperial units at the top and metric at the bottom. The rear of the ruler shows the truth tables for the logic gates and flip flops and also includes a binary conversion chart, some surface mount component footprints and some PCB drill hole sizes.

 

So how does it all work?

The digital functions are all controlled by a single PIC microcontroller. You press the gate select button to cycle through the seven logic gates or the flip flop select button to cycle through the flip flops.You can then toggle the input bits to get a result at the output of the selected gate / flip flop. The up / down counter has a button to count up and a button to count down. An on/off switch is provided to save battery power when not in use.

 

Package Includes:

• 1 x DigiRule - The Interactive Binary Ruler