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Make this Automatic Street Light Circuit using one BC547 and Relay

Last Updated on March 11, 2025 by Admin Leave a Comment

Just a single transistor, an LDR, a few resistors, and a relay could all be used to create a somewhat useful automated street light, as seen in the diagram below. […]

Filed Under: Lights and Lamps Tagged With: Automatic, BC547, Light, One, Relay, Street

Simplest Water Level Indicator Circuit using Transistor BC547

Last Updated on December 21, 2024 by Admin Leave a Comment

So you might be wondering what a water level indicator is. Well it is actually an electronic circuit that helps you see the different levels of water inside a tank. […]

Filed Under: Indicators, Water Sensor and Controller Tagged With: BC547, Indicator, Level, Simplest, Transistor, Water

Simple Delay ON Timer Circuit using Two BC547 Tansistors

Last Updated on March 31, 2018 by Admin 2 Comments

delay timer

If you are looking for a delay ON timer circuit that may be really simple yet efficient, then this tiny design will help you achieve the requirement. Using only BJTs […]

Filed Under: Timer Tagged With: BC547, Delay, ON, Simple, Timer, Two

Simple Temperature Indicator using BC547 Transistor

Last Updated on January 10, 2018 by Admin Leave a Comment

temp ind

The post explains a simple temperature indicator circuit using a single BC547 transistor and complementary 1N4148 diode. The temperature indication of a heat sink on a power transistor in high […]

Filed Under: Sensors and Detectors, Indicators Tagged With: BC547, Indicator, Simple, Temperature, Transistor

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