Design of Delay Unit Lab Report Example | Topics and Well Written Essays - 1750 words

Design of Delay Unit - Lab Report Example This means that the pin will deliver only 200mA Pin 6 – this is the threshold pin of the chip. This pin detects two thirds of the rail voltage for it to make a LOW state output only if pin two is in HIGH state. This pin contains a very high impedance and triggers at about 1uA. A 555 timer based oscillator is a circuit that generates highly and clear free running waveforms. The output frequency of these waveforms can be adjusted by connecting an RC circuit with one capacitor and two resistors. This circuits is a type of the general relaxation oscillator which generates square waveforms that are stable. These waveforms can have a fixed frequency of about 500 kHz or it can have duty cycles that are varying from fifty to a hundred percent. Unlike monostable circuits that stops after the pre-set time has elapsed, this oscillator circuit has a re-triggering mechanism achieved by interfacing the trigger input pin two and pin six which is the threshold voltage. This makes the device t o be an astable oscillator circuit. In the above oscillator circuit, pin two and pin six are connected together. This allows the circuit tio have a self-triggering mechanism in each operation cycle. This makes the circuit’s operation a free running oscillator. This circuit is also known as voltage-to-frequency converter. This is because its output frequency can be varied by varying the applied input voltage. These waveforms can have a fixed frequency of about 500 kHz or it can have duty cycles that are varying from fifty to a hundred percent.