4.3.4. Monostable configuration experiment

Components:

• breadboard
• 5V power supply
• 5mm red LED
• SPST pushbutton switch
• 220Ω, 1KΩ, MΩ resistors
• 0.01µF, 1µF capacitors
• 555 chip

Figure 4‑14 Monostable configuration experiment

Explanation: Since the input trigger signal of the 555 chip is low, we are using the pull-up resistor to ensure that the voltage is high before pressing the button. Pressing the button grounds the input pin 2 which sets the output high for the duration defined by R2 and C2 components that is demonstrated with LED.

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