Self-arming alarm
Posted on Oct 10, 2012
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 chip tester verifies the functionality and timing of a variety of 7400 series integrated...
Inverters U1a and U1b are connected in a simple RC oscillator circuit. The frequency is...
This is a useful instrument for works hops. The standard of the produced frequencies is 10 to 1....
The timed two-voltage circuit can start and run a small de motor or solenoid. The input voltage...
C1 = 3 750 pF 500 V silver-mica capacitor. C2= 100 pF preset capacitor (Jackson C803). C3 = 75...
If you refer to the above schematic, you`ll notice that the VGA-to-Scope converter has been...
Electronic thermometer has countless applications. Not everywhere can we use the standard mercury...
Field bus technology and intelligent instrument technology are automatic and controlling the...
One problem this causes is that the lovely USB port that I have been using to communicate with...
This is a design circuit for soft light dimmer. This circuit uses the IGBT STGP10N50A and the...
This is a design circuit of a simple inexpensive amplitude stabilized phase shift sine wave...
THE circuit shown provides a smooth, piercing, wailing siren with a minimum of components. Not...
Before trying to understand a full bridge circuit, you may care to read up on PWM controllers,...
The circuit uses a 555 timer oscillator to supply clock pulses of a variable frequency to the...
The hardest part for this circuit was the title. It is quite easy to miss the sound of a doorbell...
A densitometer is one of the most valuable tools a darkroom enthusiast can employ. Up until...
Circuit works: Figure shows a dedicated stepping motor controller L297 key pin, 17 feet (cw /...
FET having a high input impedance, the noise figure is small, anti-crosstalk, good mutual...
characters left: