555 Timer With Audio Alarm Circuit
Posted on Feb 7, 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.....
.
Osmond PCB is a flexible tool for designing printed circuit boards. It runs on Macintosh. Its...
The most popular LCD interface is the Hitachi 44780 based LCD controller chip which provides a...
Two dual-biquad filter chips and some external components form a multipurpose filter to reconstru
This system can be used with 4-, 6-, or 8-cylinder automobiles. The timebase formed by IC5 is an...
Examples of RF and audio ANL circuits. Positive and negative clipping occurs in both circuits....
Switch-mode power supplies offer the benefit of a much greater efficiency than obtainable with a...
The amplifier has an adjustable gain, which is performed by. R1 (a 1 Mega Ohm variable resistor)....
The following figure shown an example of a three-output flyback regulator built using LM2577 that...
NE556 timer can be used as an indicator of static of digital logic audible terminal. Audible...
In the previous post we discussed a piezo transducer element and learned how to use it with...
Build as simple a circuit as possible that will pull a logic line low every time an automotive...
Circuit To relieve you of any concern related to high frequency, I used a module ready, in case a...
Have you seen Audi, Lexus or Ford rain sensing wipers and wondered how they work in these...
The power Amplifier hi-fi OCL 120W rms sizes really, if use power supply circuit at enough good...
The CM-CU21 is a high quality, portable Commentator Unit. Its sturdy construction and flexibility...
For the first version of my Open Source Framework for USB Generic HID devices based on the PIC18F...
This is a rather old project I`ve done around 2005 but was not published on my website until now....
characters left: