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Smooth on and off the Ilyich bulb under the control of PMW


An order was received to equip the chicken coop.
Technical task:
1. Lighting. Turn on and off in time, smooth.
2. Heating.
3. Ventilation.
4. Automatic feeder, drinking bowl.

The easiest option (budget) is based on Arduino. I ordered consumables from China, and while they walk on foot to Mother Russia, I decided to prepare for the main action. Today I’ll take care of the lighting. Sketched an approximate shemka:


Arduino at a given time turns on the relay, then to the dimmer. The same principle of shutdown.
Backup power supply (if the customer agrees):

There is voltage: The charger charges the battery, which in turn supplies voltage to the converter 12 volts -220 volts. When a power outage occurs, the battery provides voltage to the entire chicken coop.
Arduina's backup power supply (agrees here without options):



As long as there is voltage, the power comes from the power supply, when disconnected, 18650 comes into operation. Enough for 3-4 hours.
Just turn on and off the electricity in time does not work. The chickens will have stress from a sharp turn on and inconvenience after turning off, they will not have time to pop on a perch. Therefore, switching on and off should occur within 30 minutes. After searching in the net for an answer, I found a trimmer circuit under the control of Arduino.

This is a modified version of the popular circuit:
Smooth on and off the Ilyich bulb under the control of PMW

Diode Rectifier: GBU-406
Field Effect Transistor IRF730
Optical pair: 4n35, but also 817 work without problems
Capacitor 68Mkfkh400 volts
Zener diode 15 volts (not available, assembled from three 5 volts)
It turned out something:
[center]

Noticed which resistor is worth it? Yes, 2 watts, if less, it gets very hot. When testing for 30 minutes, a 100 K resistor was warming up, replaced it with 2 watt, warm, but not scary, and the rest of the details are normal. The transistor is a little warm, but I'll put it on the radiator. Yes, testing on a 100-watt bulb Ilyich.

Video 2.5 second testing: https://yadi.sk/i/bUl-Uc3u3aZBMS



At the famous Chinese store there is a ready-made dimmer running PMW cost 400 rubles.Mine cost me the purchase of a transistor - 60 rubles, the rest is from the trash.
That's all for today! Tomorrow I will do the heating. Good luck!
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3 commentary
At our poultry farm KTP burned out, the owners became hungry for reserve food, the costs of disposing of the case only exceeded 300tyr!
GBU-406 and IRF730 operate in a very intense mode until the LON filament is heated (8 A for a cold lamp when it reaches its maximum voltage). Their mode can be substantially facilitated by introducing the inclusion of switching on pulsating voltage to zero.
Your TP4056 module is not suitable for your case; it is intended only for charging the battery.

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