Remote control circuit schematic diagram

Changes in temperature directly affect the egg production rate of poultry. Take hens as an example. Proper light and temperature control must be implemented in the chicken house. This example introduces
  an automatic light-controlled temperature control device for chicken houses and other egg-laying poultry. The device has the function of automatically turning on the lights when the light dims, and
  automatically starting the heater when the temperature inside the house drops. The high-speed power switch integrated block TWH8778 is used as the main control component, which simplifies the circuit and is suitable for
  use by individual poultry farmers:
    (1) Working principle
    1) DC power supply circuit: 220V AC mains power is stepped down by the capacitor cl and rectified by the J diode VD2 half-wave rectifier. VD2 stabilizes 9V and supplies the control
  circuit.
    z) Light control circuit: The picture shows the working principle of this controller. In the picture, IC 1 and IC2 use two new high-speed electronic switch
  integrated circuits . When the voltage at the control terminal of IC1 is higher than 1.6V, it is turned on, otherwise it is turned off. The light control circuit sensor is acted by the photoresistor RG. When there is
  light, the resistance becomes smaller, and the light resistance is less than 10kfl. When its voltage drop drops to 1.6V, IC1 does not conduct, pin ② outputs low level, and the relay Kl
  Not working, the EL light bulb does not light up. When the day gets dark, the resistance of the photoresistor becomes larger, and when its voltage drop rises to above 1.6V, ICI is turned on, and pin ②
  outputs a high potential - the relay Kl is closed, and the light shines, increasing the illumination of the chicken house. , the light-emitting diode LEDI emits light, indicating that
  the illumination is increasing. When the light becomes stronger, the relay Kl is released again, and the light bulb EL is also extinguished. :
    3) Temperature control circuit: The temperature control circuit is composed of components such as IC2. The thermistor RT used in the sensor has a negative temperature coefficient. When the temperature rises,
its resistance becomes smaller. The voltage drop of the thermistor is lower than 1. 6V. IC2 does not conduct electricity, relay K2 does not work, and the heater has no power. When the temperature drops
, the resistance of the thermistor rises, and its voltage drop also rises. When it rises above 1. 6V. TWH8778 is turned on, relay K2 is energized
, and the working power supply of heater Rs is turned on to heat the chicken house. At the same time, LED2 emits light, indicating that it is in a heating state. When the temperature rises to a
certain value again. IC 2 turns off again and the heater stops heating. This continuous cycle can ensure a constant temperature in the chicken house.