Humidity Sensor – Humidity to Frequency Output

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https://www.electronics-lab.com/project/humidity-sensor-humidity-to-frequency-output/

This sensor board provides frequency output as per relative humidity value. The project is based on a unique capacitive cell, this relative humidity sensor is designed for high volume, cost-sensitive applications such as office automation, automotive cabin air control, home appliances, and industrial process control systems. It is also useful in all applications where humidity […]

LED Fading Effect / LED Strobe using 555

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https://www.electronics-lab.com/project/led-fading-effect-led-strobe/

In general, generating an LED fade effect requires a microcontroller or another expensive circuit. We have built this low-cost LED fading board using an inexpensive 555 Timer. The 555 timer is used as an astable multivibrator, which generates low-frequency pulses, further, this pulse train is feed to the base of BJT transistor TIP122 with a […]

60W LED Dimmer for 12V LEDs using 555 Timer

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https://www.electronics-lab.com/project/60w-led-dimmer-for-12v-leds-using-555-timer/

The project shown here is a cheap 60W LED dimmer for 12V LEDs/12V LED strips. The circuit is based on the very popular, versatile, and low-cost 555 timer IC, NE555 IC generates a PWM signal and IRF540 MOSFET works as output driver for the LEDs. In this circuit the 555 IC used in an astable […]