Intelligent seed germination box based on STC89C54RD single-chip microcomputer control system
A single-chip microcomputer control, germination box technology, applied in the direction of germination equipment, etc., can solve the problems of insufficient water, alcohol poisoning, increase in the number of rice seedlings, etc., and achieve the effect of ensuring circulation and uniform temperature and humidity
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[0022] The two capacitors of the minimum system circuit C9 and C10 of the single-chip microcomputer are called the load capacitance of the crystal oscillator, which are respectively connected to the two feet of the crystal oscillator and the capacitance to the ground, generally in tens of picofarads, which will affect the resonant frequency and output amplitude of the crystal oscillator . The two capacitors are grounded, which is actually the voltage-dividing capacitor of the capacitor three-point circuit. The ground point is the voltage-dividing point, and the ground point is the voltage-dividing point as the reference point. The input and output of the oscillation pin are anti-phase, but from the parallel resonance The loop, that is, the two ends of the quartz crystal, forms a positive feedback to ensure that the circuit continues to oscillate.
[0023] The reset signal of the 89 series MCU is input from the RSET pin to the Schmitt trigger in the chip. When the system is in...
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