Humidity control circuit using NAND gate and transistor
Source: InternetPublisher:走马观花 Keywords: Control circuit transistor NAND gate BSP Updated: 2020/01/03
An RC self-excited multivibrator is composed of two NAND gates
Di, Dz, resistor Rz, capacitor Cl, etc., with an oscillation frequency of
2.5Hz and an oscillation amplitude of 4V. Humidity resistor RS is used as the temperature detection element. The control circuit is composed of transistors VTi~VT4
.
When the humidity drops to the set value (can be adjusted by the potentiometer RPi), the relay KA2 is released and the power supply of the dryer is cut off;
at the same time, KAi is closed and the power supply of the humidifier is turned on. When the humidity rises, the RS resistance decreases, and when the humidity reaches the set value.
KA2 closes and repeats the above process to keep the indoor humidity near the set value.
- Current output characteristics of brushed motor driver chips. How to increase the peak drive current?
- Controlling LEDs with Multithreading via Dual-Core Programming on Raspberry Pi using MicroPython
- A simple door handle touch alarm circuit
- Replace the GE LOGIQ a200 ultrasound measurement key with a self-made touch switch
- One-way rotation circuit of motor controlled by contactor
- Design and production of wireless multi-location control switch circuit
- Magnetic door and window anti-theft alarm
- Guanghua brand anti-theft doorbell electronic lock circuit
- Car audio system anti-theft circuit
- High-sensitivity and high-loudness burglar alarm circuit
- Excellent performance household inverter power supply circuit
- Self-defense anti-riot circuit
- Homemade disinfectant circuit
- Poultry warming temperature control circuit
- Soil water shortage prompt circuit
- Integrated synchronous detector composed of analog multiplier MC1596
- Audio function generator composed of ICL8038
- Series crystal oscillator
- superheterodyne radio circuit
- Sawtooth wave generator circuit (1)
京公网安备 11010802033920号