Two sirens sound with ic 555
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.....
.
When you use microcontrollers in your designs, sometime you face a problem how to show user...
This circuit is capable of driving filament lamps of nominal rating 200 mA at 60 V dc from a CMOS...
The LED is the CSL310L which contains a red LED and a green LED connected back to back and...
The radio beacon band extends from 280 to 516 kHz. Each beacon has its own characteristic...
This circuit provides either latched switching or timed switching. U1A and UlB provide audio...
I initially designed these circuits for a friend who had muscle problems and while he says they...
I have built several boards using the bq51013 EVM receiver circuit and a TPS61085 boost converter...
A simple way to produce your own speaker transformer by winding turns on a piece of ferrite rod....
This timer was designed mainly to switch off a portable radio after some time: in this way, one...
I`m not all that clear of the difference between a data selector and a multiplexer. Although the...
The TPS6420x controller is designed to operate from one to three series-connected cells or from a...
The most glaring ommision was that the DRUID did not accept confirm codes (ie the solution to the...
A transmitting circuit, power, infrared light-emitting diode emits light receiving circuit shown...
By phone automatically when the lamp base circuit NE555 and optocouplers constituted a call at...
characters left: