555 tone generator
Posted on Feb 4, 2014
Related Circuits
New Circuits
-
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.....
.
The test circuit gives an indication of the capacity remaining in a battery. By noting the time...
This is a high fidelity external USB Soundcard / USB Headphones project that can be built for...
The goal of this project was to build a circuit that would monitor a person`s sleep activity and,...
The chips that are termed "working well" yield about 300 mV under the beam from a laser pointer...
I got frustrated and decided to hook it up to a 15v supply and jump R3 with a clip-on soldering...
The following is an account of such an undertaking. Recently I was involved in a design review...
The purpose of this circuit is that of power a lamp or other apparatus for a given time (30...
This board does NOT use the CTS256AL2 text-to-speech chip. [It would seem that both...
A Miniature Real-time Controller controls night light, A/C, household appliances with...
Turn ON or OFF electrical devices using remote control is not a new idea and you can find so many...
According electronic schematic of DC driver motor using L293D in figure 2, we can use it to...
At this point you whistle into the receiver and the Infinity Bug will pick up the line. The...
Simple rectifier circuit replaces battery in vacuum-tube voltmeter. Provides good regulation and...
The resistors could be 1/8w, The zener diode could be a 250mW part, or it could be a 1W part (1N...
characters left: