555 IC using a delay circuit of the four b
Posted on Nov 10, 2015
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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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Using the simple circuit in Figure 1, you can control the light intensity in your room or work...
This design adopts a well established circuit topology for the power amplifier, using a...
Many a times one needs an extra telephone ringer in an ad joining room to know if there is an...
This voltage-booster circuit for driving one or more white LEDs uses a 555 timer as its main...
A dual DC motor controller that utilizes an H-bridge controller chip. As well as the basic...
The communications between commercial aircraft and the ground can be interesting, amusing and...
Most FM tuners from this era suffer from two major problems. They have a high and reactive output...
The Geiger counter is a scientific instrument that can detect ionising radiation such as alpha...
This application note describes a Digital Blood Pressure Meter concept which uses an integrated...
A very simple Ionization Smoke Detector with Interconnect and Timer alarm circuit can be...
The NES version of this hack is very similar to the SNES version and I recommend reading that...
Build a reprogrammable cartridge. Many things can be done with such a cartridge: You can develop...
This circuit adds a datasheet-compliant trigger signal, reversed polarity protection, optional...
Figure 1.88 using the loudness of several tapped the potentiometer control circuit. In FIG. (A),...
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