The 555 timer frequency must be adjustable with a variable resistor so that the final

engineering

Description

Using a 555 timer, an 8-bit synchronous counter and an 8-bit R-2R ladder DAC, design and 

construct a waveform generator that can be switched to produce the following waveform 

outputs. Only three switches or less may be used.

The 555 timer frequency must be adjustable with a variable resistor so that the final 

waveform output frequency range is 100 Hz to 1 kHz.

1. A sawtooth wave

2. A reverse sawtooth wave

3. A triangular wave


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