NE555 Pulse Starter Duty Cycle and Frequency Adjustable DC 5-12V (FS01183)
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Produs:Nou, Fără garanție
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Numar articol:193298982
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Disponibilitate:Indisponibil
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Preț:30,00 Lei
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Anuntul a expirat la:16.05.2019, 08:06
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Specificatii
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NE555 adjustable pulse generator
NE555 adjustable pulse generator is based on
NE555 chip, built into an oscillator circuit.
1>. That principle
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,
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, make the discharge end (DIS) 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 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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