Humidity Sensor – Humidity to Frequency Output
Sensor

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,...

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998
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LED Fading Effect / LED Strobe using 555
Led

LED Fading Effect / LED Strobe using 555

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...

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1443
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60W LED Dimmer for 12V LEDs using 555 Timer
Led

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...

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1410
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Free Elektor Circuit – An NE555 Watchdog Timer
Basic Electronics

Free Elektor Circuit – An NE555 Watchdog Timer

from an Idea by Wolfgang Borst (Germany) Virtually every modern microcontroller has a built-in watchdog. It prevents the microcontroller ‘hanging’ which may be the result of a programming error or an unforeseen operating condition, where, for example, the program becomes trapped in...

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6437
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12V NE555 PWM Controller
ControlMotor

12V NE555 PWM Controller

baelza.bubba @ instructables.com build his own PWM controller which is able to operate as a 12V Motor Speed Controller, LED Dimmer, Heat controller, voltage controller for an electrolytic etcher etc.   I did some hunting around on the interweb and found a pretty good starting...

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7282
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Power-on Reminder with LED Lamp
Miscellaneous

Power-on Reminder with LED Lamp

Many a times equipment at workstations remains switched on unnoticed. In this situation, these may get damaged due to overheating. Here is an add-on device for the workbench power supply that reminds you of the power-on status of the connected devices every hour or so by sounding a...

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4564
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Warning LED Flash Light
Led

Warning LED Flash Light

LED Flasher is a simple project producing a flashing effect of six LED’s.  This project can be used in all areas where you want to draw attention.  Hi-glow LED’s providing enough flashing light to attract your attention. Can be used as warning light. Specifications Supply...

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5252
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Disco Lights with IC555
Basic Electronics

Disco Lights with IC555

This is a simple 555 timer IC circuit that is able to power two strings of LEDs alternative. Disco lights are mostly used in decoration made with colourful LEDs. For begginners, this is a compact circuit using a single chip IC. IC555 is connected here to form a multivibrator. The...

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7391
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