Logg-O is a Logic Gate Simulator which allows you to hook up gates and test the functions performed by those gates. It has four modes of operation, indicated by the four icons at the bottom left corner of the screen. These are, in order, drag (hand icon), wire (wire icon), cut (scissors), and run (running man). |
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There are six gates: AND, NAND, OR, NOR, NOT, and XOR. Below these there is an ON/OFF switch, , an indicator light, a clock input, and an extra node object. Any of these objects can be dragged onto the work field, connected, and simulated in the configuration you specify. The switch can be turned on and off during run mode, the indicator light will light up green when it is ON, and the clock will cycle ON and OFF.
Drag
Drag mode lets you drag any of the gates, switches, clocks, indicator lights or additional nodes onto the screen. Select drag mode by clicking on the hand icon. Grab any object at left by clicking and holding with the mouse, then, without releasing the mouse button, drag it onto the working area of the screen at left. Release the mouse button to place the gate or other object.
Wire
Wire mode lets you wire gates and other objects together at nodes represented by the solid black dots. Select wire mode by clicking on the wire icon. Click the mouse over any node, at the terminal to a gate, the output of a switch, the input of the indicator light, etc., and drag a wire out, holding down the mouse button. When you release the mouse button, the wire will terminate. If you release the mouse button over another node, the wire will connect the starting and ending points. If you release the mouse button in an open area of the work field, a new node will be created.
Cut
Cut mode lets you delete unwanted or unused objects from the work field. Select cut mode by clicking on the scissors icon. To delete an object, click once on it. You can click and delete gates or wires this way, as well as additional nodes.
Run
Run mode lets you simulate any circuits you've built. Select run mode by clicking on the running man icon. The circuit will immediately start simulating. Inputs which are ON (set to 1) will light up in green. Inputs which are OFF (set to 0) will light up in red.
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