Oscilloscope Selection Calculator
Bandwidth and sample rate from signal requirements.
Inputs
Results
Frequency (Hz)
138.75
Duty Cycle (%)
54.81
Frequency (kHz)0.14
Period (ms)7.21
High Time (ms)3.95
Low Time (ms)3.26
Avg Timing Current (mA)0.05
Period (µs)7,207.2
Nearest NoteC#3
How to Use This Calculator
- Enter the timing resistor values R1 and R2 (Ω) and timing capacitor value (nF) for your 555 circuit.
- Review the calculated output frequency (Hz and kHz), duty cycle (%), and period (ms).
- Adjust R1, R2, or C to tune frequency and duty cycle to your target values.
- Use the high-time and low-time outputs to verify timing against your circuit requirements.
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