555 Timer Circuits
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This is a continuation of my previous article regarding class d amp using 555 timer chip. Looking back to several schematics on that article, some of you may wonder why I include another 555 as U2 in the drawing. The main purpose of this U2 is to establish.... -
So here is another improvised model circuit that will eliminate the unwanted DC offset voltage from the output that affect the previous one discussed. By the way, all previous circuits that I discussed were intended as low power class d amp source that is.... -
The simple battery charger circuit design shown here uses the versatile IC 555 as the main component. The circuit can be used for charging all types of rechargeable batteries within the specified limits as given in the article... -
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This is the circuit diagram of touch activated alarm system which still activated on load shedding. Alarm system will be activated when someone touch the touch plate which is called trigger. In this circuit the most updated part is automatic battery.... -
Simple Timer With 555 is one example of a simple timer and can be applied to electronic equipment. With 555 Timer Simple series takes advantage of the mode of the IC monostable multivibrator 555. With the relay output control circuit can be used to control.... -
This simple 12VDC to 220VAC inverter circuit produces an AC output at line frequency and voltage. The 555 is configured as a low-frequency oscillator, tunable over the frequency range of 50 to 60 Hz by Frequency potentiometer R4. The 555 feeds its output.... -
This is a circuit that can be used for dark activated means the relay will be activated when thelight intensity fall below a certain threshold. Without hysteresis, the relay will be activated and deactivated if the sensed brightness fall under or rise above.... -
I bricked my iPod shuffle, seems that the controller chip for the mini jack got wasted as it could no longer detect charger, PC connection or play music as it could not detect headphones. The arc have to be very short in order to limit the distortions of an.... -
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Simple circuit diagram is a schematic remote control, remote control where it consists of two parts of the transmitter and receiver. The first part is a transmitter, circuit diagrams for transmitter IC is controlled by the NE555. This system works by.... -
This is a simple yet effective darkness activator. It uses an LDR to detect the light and when no light is present, it will sound an alarm from a cheap 8Ohm speaker. This circuit can be easily converted to a light detector by simply adding an inverting.... -
This is a circuit of a voltage-controlled oscillator (VCO) that uses the 555 timer IC as the main component. As expected, the 555 timer is configured as an astable multi vibrator to be able to serve as an oscillator. An astable multi vibrator is just a.... -
A very simple music instrument/keyboard for playing music using a 555 timer chip circuit, a piece of paper and a pencil. To see it in action watch the how-to-make video below. And then I made the much fancier automatic music player in the photo below by.... -
As we know its on chip multivibrator means with IC555 one can design astable, monostable, bistable multivibrators. Its main applications are to generate timings, clock waveform, generate synchronizing signals, square wave oscillator and many more. So here we....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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