Category: 555 Timer Projects

Here is one another project which is useful in our daily life using the most popular IC NE555. The project high-brightness LED strobe uses an array of 36 high-brightness LEDs. The advantage of project is it is small battery powered and very efficient. A variable resistor on the side allows the frequencies of the flashing to be varied. Circuit Description of High Brightness LED Strobe Using IC 555 Circuit diagram of high-brightness LED strobe is shown in figure 1. The entire circuit is build around timer IC NE555 (IC1) or we…

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Here is a simple circuit mains box heat monitor for sensing high temperature due to overheating. This circuit helps to prevent disasters caused by only sparking in the mains box due to any fault as a short circuit overloaded. This circuit is so designed that it also automatically switches on a bright white LED (LED3) in case of power failure. This light is sufficient to check the mains box wring or fuses in darkness. Circuit Description Mains Box Heat Monitor The circuit is built around a timer IC, a sensor,…

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There are many display circuits already published in BEP. But the circuit Running and Spellar Effects of Light Circuit is very special in its own way because it contains all the facilities required for any type of decoration. Lighting decoration broadly consists of two main categories-the running effect and the spellar effects. Running effect is well known to every electronics hobbyist. The spellar effect consists of many output driving the load-lamps; all of them go high one after another, and eventually all outputs becomes high simultaneously showing a complete display.…

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The project Ten channel Sequential Lighting presented here gives a flashing light effect from left to right and then from right to left. IC1 (NE555) generates clock pulses for IC2. The output using rectifiers produce the effect of bulbs flashing from left to right. As the carry output pin 12 of IC2 is connected to the clock input of IC3, the bulbs which are connected to IC5 also starts flashing from right to left. As these outputs are not capable of handling large currents, they have to be amplified to…

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The circuit Automatic Time Indicator for Telephone presented here provides an audible warning 2.5 minutes after dialing the telephone. The circuit does not make use of telephone line for its operation. Circuit Description of Automatic Time Indicator for Telephone The circuit consists of three 555 ICs. It can be divided into three parts- touch switch using IC1, timer using IC2 and oscillator using IC3. The on touch plate is in the form of a wire, the insulation of which is attached to the stopper on the telephone dial. The off touch…

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