SparkED

@Afghan_Engineer • 45,061 subscribers

Electrical Engineer | Digital Creator | Creating videos & pics, explaining science, engineering, renewable energy & climate change. Electrical 🧵 everyday.

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Stop guessing cable size.

In Boolean algebra, De Morgan’s Laws help simplify logic circuits: 1. NOT (A · B) = A̅ + B̅ AND → OR, and invert each input. 2. NOT (A + B) = A̅ · B̅ OR → AND, and invert each input. Simple rule: Break the bar → change AND ↔ OR.

Water level indicator.

A simple DIY 3.7V li-ion battery charger circuit.

Bridge rectifier.

Proximity sensor.

Current leads voltage in inductor. Voltage lags current in capacitor. No phase difference between current and voltage in resistor.

IR proximity sensor circuit Used an infrared LED to send out invisible light &amp; a receiver to detect reflections. When an object comes close, the reflected IR light is sensed and the circuit gives an output signal. It’s commonly used for obstacle detection and automatic systems.

Carlo Anceloti after that Rodrygo goal. @rodrygogoes001 Real Madrid C.F. Real Madrid C.F.en

Videos

Watch Anya Live

Walking barefoot can stimulate the nerves in your feet, improve sensory awareness and balance, and provide a relaxing outdoor experience. Barefoot → sensory stimulation + relaxation + connection with nature

Full bridge rectifier.

1.5mm2 thin wire for lights vs air conditioner.

Why cable burn without tripping the breaker?

House energy management MATLAB simulation.

Ohm's law as linear equation.

Neutral and earth serve different purposes. Neutral carries normal return current; earth is for fault protection. They are bonded at the designated point of the electrical system, but downstream they should remain separate. Neutral = return path Earth = safety path

An AC doesn’t create cold; it removes heat. The refrigerant absorbs heat from indoor air through the evaporator coil, then releases that heat outside through the condenser. The cooled air is circulated back into the room.

Solar light tracker circuit.

There is no single value for every installation. A common target is ≤5Ω, while sensitive systems may require ≤1Ω. The correct value depends on the earthing system, fault protection, soil, and applicable electrical standards. Lower resistance = better fault-current path.

10kW Load: 3-Phase vs Single-Phase For the same 10kW load, a 3-phase supply draws much less current per conductor than single-phase. At 400V 3-phase: ≈14A/phase At 230 V single-phase: ≈43.5A Lower current can mean a smaller conductor size and lower losses.

Earthing vs Neutral.

This is why transformers hum.

Learn how to use multimeter to check appliances like a Pro.

Inverter space vector PWM.

Electronic components.

The PIC16F877A is an 8-bit microcontroller designed to execute control logic and manage peripheral data in embedded systems. It is primarily used in industrial automation, robotics, and consumer electronics to interface with sensors and control mechanical components.

DC motor all you need to know about simply explained.

IR proximity sensor circuit Used an infrared LED to send out invisible light & a receiver to detect reflections. When an object comes close, the reflected IR light is sensed and the circuit gives an output signal. It’s commonly used for obstacle detection and automatic systems.