You can use a logic analyzer, oscilloscope, multimeter with frequency-counting, or even an audio input jack on a computer, to determine the precise value from the output of the 555 timer. This breakout lets you adjust the frequency of the output from the 555 timer. The output is always a 50% duty cycle square wave driven by a 74HC1G04 buffer.
The 50% duty cycle for the output cannot be changed.
Wiring
You can power the board with 3V to 12VDC. You can connect the SIG pin to your chosen analyzer input. The following is the board wired up using a JST PH cable:
- Power supply VOUT to breakout STEMMA Vin (red wire)
- Power supply GND to breakout STEMMA GND (black wire)
- Breakout STEMMA SIG to analyzer input (white wire)
The following is the breakout wired up using a solderless breadboard:
- Power supply VOUT to breakout Vin (red wire)
- Power supply GND to breakout GND (black wire)
- Breakout SIG to analyzer input (white wire)
Analysis
After the 555 is powered up, setup your chosen analysis tool. Select your frequency range with the slide switch and then fine-tune the frequency using the trimmer pot on the board. You'll see the frequency change on your tool as you adjust these settings on the board.
Page last edited May 16, 2024
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