Product Applications

NE555 Pulse Generator Duty Cycle and Frequency Adjustable Module DIY Kit

The multivibrator composed of 555 timer, and waveform as shown in figure after turning on the power supply.

Power supply VDD through R1 and R2 for capacitance C charging when Uc < 1/3 VDD and oscillator output Vo = 1, discharge tube.

After the Uc charge to 2/3 or more VDD, oscillator output Vo flip to 0 the discharge tube conduction making the discharge end  grounding, capacitance C through R2 to discharge, bring down the Uc.

When reduced to a third or less VDD Uc, oscillator output Vo and flip into 1, discharge tube and as of right now, make the discharge end (DIS) not grounding, power VDD through R1 and R2 and recharging the capacitance C, made up from a third VDD Uc two-thirds VDD, trigger and flip, so the cycle, so as to get continuous variation on the output side Vo oscillation pulse waveform.Pulse width 0.7 R2C TL material, determined by the capacitance C discharge time;TH = 0.7 (R1 + R2) C, is determined by capacitance C charging time, pulse period T material TH + TL
2>. Directions for use 1.The input voltage: DC5 ~ 12 v.The amplitude in: 4.2 V to 11.4 V

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