![]() ![]() By increasing these values, it will reduce the output frequency. By decreasing the value of the resistor and or the capacitor, it will increase the output frequency. This produces a frequency of about 15 Hz (about 900 pulses per minute). I used a 10 ♟ capacitor and a 4.7 kohm resistor. The frequency of these pulses is determined by the value of the capacitor that is connected to pins 1 and 2 and the value of the resistor that is connected to pins 2 and 3. ![]() This circuit is connected to the mouse through a small momentary switch that acts as the rapid fire button. A small diode is added to the output to prevent the circuit from shorting out if the rapid fire button and the left mouse button where ever pressed at the same time. This is what will activate and deactivate the click function of the mouse. The output of this circuit is a series of pulses that alternate between HIGH (5 volts) to LOW (0 volts). This is connected to pins 4 and 8 of the IC. Power for this circuit is supplied by the 5V line from the computer that also powers the mouse. ![]() The circuit used in this project is based around the 555 timer IC. ![]()
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