Simple Guitar Effects Circuit

[English]
The series of guitar effects that will we make is very simple. IC UM3561 to producefour different sound effects, the output at Pin 3 will be amplified by transistor 2N2222. Both 4-way switchs will control the sound effects. Position 1 (as drawn) into police siren, position 2 is the sound of fire trucks, ambulances and position 3 is 4 is the effect of machine guns. This is following circuit schemes :

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Multivibrator Monostable IC 555 Circuit

[English]
Monostable multivibrator circuit IC 555 is a pulse generator circuit which pulse duration is determined by the RC that is connected to the IC timer 555. In the vibrator, one output will be stable for another quasi-stable (unstable). To trigger the automatic output of a quasi-stable state to stable state deposited by an external capacitor that is connected to a reference level. The time needed depends on the pulse width in storage. Output transition from stable state to a quasi-stable state is triggered by external factors.

The capacitor C should be free through the barriers of RA. RAC constant time constant is bigger, longer time required for the capacitor voltage to reach 2 to 3 VCC. In the other words, the time constant RC of the output pulse width control. Pulse width of the circuit can range from micro-seconds to many seconds. This circuit is widely used in industry for diverse of time circuits.

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9 Seconds Timer with 7 Segment

[English]

This circuit counts down for 9 seconds with 7 segment display. When the switch is closed, the CD4010 up / down counter timer attached to the 9 and 555 disabled with the output held high. When the switch is opened, the timer produces a second clock signal, reducing the counter until the count 0 is reached. When the count reached zero, the implementing signal at pin 7 of the timer into a low, giving power12 volt to relay and stopping the clock with a low signal on reset line (pin 4). Relay will remain live until the switch is again closed, resetting the counter to 9. The first second clock signal from the timer 555 can be adjusted slightly longer or shorter by increasing or decreasing the resistor value on pin 3 of timer.

Note:

* This circuit can be activated from the 9V battery or 12V DC power supply.

* Time delay can be varied by changing the resistor value on pin 3 IC555.

* The switch push button to start the timer.

* Equipment can be connected via relay contacts.

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