In this post we will learn 5 useful power supply failure indicator circuits which can be used to get an instant indication regarding an input power failure situation. This post […]
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LED Arrow Direction Indicator Circuit
The arrow-shaped LED direction indicator circuit utilizing the 74LS164 based IC and a configuration of 14 LEDs arranged in the shape of an arrow is a captivating and visually appealing […]
Atmospheric Pressure Indicator Circuit [LED Barometer Circuit]
With temperature, if there is one characteristic physical quantity of the past or future weather, it is certainly atmospheric pressure. The variations of this quantity are particularly interesting for weather […]
Windshield Washer Fluid Indicator Circuit
In this article we discuss a permanent indicator of the windshield washer fluid level. Knowing that electronics do not mix well with liquids, instead of using a float gauge system, […]
Simple Temperature Indicator Circuits using Thermistors
A thermometer may be required for the precise measurement of temperatures. However, in many cases, an absolute value isn’t required and a relative estimate is sufficient. For example, the consumer […]
3 LED Battery Level Indicator Circuit
The proposed 3 LED battery level indicator can be typically used for monitoring a 12 V lead acid battery charge level, through 3 distinct LED illumination. The entire circuit is […]