Circuit Lake

Here is a circuit that can be used to detects the leakage of LPG gas and alerts the user through audio-visual indications. The circuit uses SEN-1327 gas sensor module from RhydoLABZ. Its output goes high when the gas level reaches or exceeds certain point. A preset in the module is used to set the [...]

The projects shows you how to build simple low cost Inductance Meter based on popular IC 555. The 555 works in its most simple rectangle oscillation configuration. In this mode, the duty-cycle should be around 50%, but this depends on the load on pin 3. Over the amplifying transistor Q1 the AC is given [...]

The purpose of the project is to build a simple charge controller for solar and wind systems based on IC NE555 Timer. Michael Davis, the designer, decides to use IC 555 instead of MCU because he worried that the microcontrollers would be too expensive or difficult to obtain in some parts of the world, and [...]

This digital speedometer project was built to replace unreliable analog speedometer of 1971 Datsun 1200. The circuit uses digital IC like 555 timer, 4017 CMOS decade counter, 74C14 hex schmitt trigger inverter, 4553 CMOS 3-digit BCD counter and IC6 4511 seven-segment decoder/driver. This car speedometer project is equipped with two strong magnets to the tailshaft [...]