Electric Diary

25/04/2026

19/03/2026

12V Touch Switch with MOSFET IRFZ44N.
Switch on and off the lamp with a simple touch.

17/03/2026

Finding the Total Voltage in a Series Battery Connection
Four 12V batteries connected in series, where the positive terminal of each battery connects to the negative terminal of the next. In a series connection, the voltages add up to produce a higher total output voltage.

17/03/2026

Auto–Manual Float Switch ⚡💧
This circuit is used to control a 3-phase water pump with two modes:

🔹 Manual → The pump is turned on directly via the Start/Stop button.

🔹 Auto → The float switch in the tank operates automatically according to the water level.

Equipped with a contactor and overload relay for motor protection for increased safety and durability. 💡🔧

16/03/2026

This image displays different types of inductors, which are passive components used in electronic circuits to store energy in a magnetic field.

16/03/2026

Easily convert 3V into 40V with this LM555-based elevator circuit: compact, efficient, and perfect for electronic projects.

14/03/2026

“A small circuit with great power:
it converts 12V DC to 220V AC and demonstrates that electronics is pure creativity and engineering.”

14/03/2026

Single phase & three phase motor current calculation

13/03/2026

Manual 3 phase motor operation with timer

13/03/2026

With a 5mm LED, MB10F SMD diode, and 1k puedes resistance, you can turn a common test pen into a DC detector that works in any polarity. 💡
Practical, simple and useful for electronics work.

13/03/2026

DIY Non-Contact AC Line Detector using C1815 transistors to safely sense live AC wires without direct contact. ⚡🔍