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Light control relay, day-night sensor - in one word, a photo relay for controlling lighting or generating a signal for the smart home system to decrease or increase illumination relative to a given level. The relay is made according to the classical scheme, a capacitor power supply unit, from a 220 volt alternating current network. Relay for 24 volts - to reduce the current consumption of the device. The whole innovation lies in the use of a PIC controller. This gave the minimum number of external components, which speeds up and simplifies assembly, as well as additional functions in the work.
Classic relays on operational amplifiers mainly provide one function, this is the turn-on hysteresis (and even then not always). The controller allows you to add a couple more functions that are necessary for the operation of the twilight relay.
Delay function on and off lighting.
If the light level has dropped to the switch-on level, a timer is activated in the controller, for example for 2 minutes. After the expiration of the time, if the illumination level corresponds to the switch-on level, then the illumination turns on, otherwise we wait until the illumination level is stably low. The timer allows, for example, to get rid of the effect of "car headlights" - when advertisers have to install a light sensor so that the light from a road vehicle does not turn off advertisements.
A more detailed description and diagram of the device can be found on the website OpenVoron
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
