The CD4047 is mostly used as an oscillator or pulse generator in inverter circuits and timing applications.
✅ Most Common Uses of CD4047:
1. 🔄 DC to AC Inverter Circuits
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Most popular use case
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CD4047 is used in astable multivibrator mode to generate square waves (usually 50Hz or 60Hz).
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The square wave drives MOSFETs or transistors, which power a transformer to convert 12V DC to 220V AC.
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Reason it's preferred: It provides complementary outputs (Q and !Q) with accurate 50% duty cycle — ideal for driving push-pull stages.
2. ⏱️ Monostable Timer Circuits
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Used as a one-shot timer.
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On receiving a trigger, it gives a fixed-width pulse.
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Applications: Switch debouncing, delay timers, pulse stretcher, etc.
3. 🌀 Free-Running Oscillator
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Generates a continuous square wave of a set frequency.
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Used for LED blinkers, clock pulses for counters, or any general square wave source.
4. 🔁 Frequency Divider or Toggle Circuit
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Acts like a flip-flop or frequency divider by using Q and !Q outputs.
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Helpful in digital electronics experiments or prototyping.
🏆 Why It’s Popular:
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Works at low voltages (3V to 15V)
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Very low power consumption (CMOS-based)
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Stable frequency output over time
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Provides both normal and inverted output (Q and !Q)
🧰 Typical Projects Where CD4047 is Used:
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DIY power inverters
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Timer or delay circuits
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Simple alarm systems
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Light flashers
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PWM motor controllers (basic)
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Signal generators for test equipment
