Autostart of the diesel generator in the event of a power outage on the PIC16F84A microcontroller. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / Clocks, timers, relays, load switches

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This article proposes to repeat for use in everyday life a device that automatically starts the engine (electric generator) when the power supply to consumers is interrupted.

The device is based on the PIC16F84A microcontroller.

The work algorithm is as follows:

Each cycle of the program controls the entrance to which, in the case of the presence of El. The energy in the network is given a logical "1". In the event of a supply interruption, a logical "0" appears at this input and the cycle of automatic start of the engine-generator starts.
1. Opening the suction damper.
2. Turn on the ignition.
3. Starter, 3 cycles of 2 seconds, pauses between cycles of 5 seconds. (If the engine does not start, the cycle stops so as not to kill the battery and the device goes into passive mode)
(If the engine is started, then the starter is turned off, the ignition remains on, after a pause of 10 seconds, the suction damper closes).
4. The device switches to the power recovery standby mode.
5. When the supply is restored, the generator is automatically turned off and everything returns to its original state.

(click to enlarge)

As a servomotor to control the gas choke damper, a lock lifter from a car alarm kit was used. To reverse the circuit, 2 relays are used. Reversal occurs when the polarity of the power is reversed.

Transformers TR1 and TR2 are any low-power transformers for voltages of 220 / 3.3 V. You can also use them for high secondary voltages, but you will have to put a resistor divider at the output, taking into account the resistance of resistors R10, R11. The divider must provide a logic "1" level (4 - 5V).

Download firmware HEX

Author: Artur (Lefty); Publication: cxem.net

See other articles Section Clocks, timers, relays, load switches.

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