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create 20 minute period 50% duty cycle pulse form it
ajinkya-open

ajinkya-open

@copilot create 20 minute period 50% duty cycle pulse form it
1y

copilot

To create a 20-minute period square wave with a 50% duty cycle using the CD4060BE, you'll need to use it as an oscillator and frequency divider. The key is setting the proper frequency of the oscillator so that, after passing through the frequency divider, you achieve a 20-minute period.
The CD4060BE has a built-in oscillator and a chain of 14 flip-flops. We can use these flip-flops to effectively divide the oscillator frequency.
Steps to Achieve a 20-minute Period Square Wave:
  1. Determine the Required Oscillator Frequency:
    • A 20-minute period is 1200 seconds.
    • The highest frequency division output is Q14, which divides the input frequency by $2^{14} = 16384$.
    • Therefore, the oscillator frequency $f_{\text{osc}}$ should be: fosc=11200 s×16384≈13.653 Hzf_{\text{osc}} = \frac{1}{1200 \, \text{s}} \times 16384 \approx 13.653 \, \text{Hz}
  2. Set up the Oscillator:
    • The CD4060BE uses an RC network to determine the oscillation frequency. The basic equation for the oscillator frequency is: fosc=12.2×R×Cf_{\text{osc}} = \frac{1}{2.2 \times R \times C}
    • Solve for R and C to achieve the desired oscillator frequency.
  3. Connect the Circuit:
    • Connect a resistor (R) and capacitor (C) to U1 as necessary for the oscillator.
    • Connect U1:Q14 to your desired load or buffer to generate the square wave.
Example Calculation:
Let's choose a capacitor value and solve for the resistor:
  • Assume $C = 100,nF = 100 \times 10^{-9} , \text{F}$
  • Then $R = \frac{1}{2.2 \times 13.653 \times 100 \times 10^{-9}} \approx 331 , \text{k}\Omega$
Connections:
  • Connect U1:ΦI to ground through R and C as part of your timing setup.
  • Connect U1:VDD to supply voltage (e.g., 5V).
  • Connect U1:VSS to ground.
  • Connect U1:RESET to ground (unless you need reset functionality).
  • Connect a load (or buffer) to U1:Q14 to get your output square wave.
Would you like more details, or do you have any specific components you’d like to use for R and C?
1y
1
U1
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