Alarm Phone Dialer
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.....
.
Pulses from the distributor points are passed through a current limiting resistor, rectified, and...
This circuit has a 100 mV hysteresis which can be used in applications where very fast transition...
Three individual flashing circuits that use an LM3909 LED flasher/oscillator IC create the...
The BA1404 fm stereo modulator Ic contains all parts needed to design an simple high efficiency...
The circuit includes a shift register chip (74HC595N), which I couldn`t find on CircuitLab. Is...
This circuit yearn for act the performance of the equipment, otherwise Check the fuse here the...
Various embodiments of the BB metal detector have been published, and it has been widely...
The aim of this design was to reproduce a Combo amplifier of the type very common in the `sixties...
Calculates the difference between the two waveforms to arrive at what he believes is the voltage...
There are two main types: the most common is the Wein Bridge oscillator variety, which has low...
Use some tiny blinking LED`s as fireflies. It takes a bit of electronics skill to do this project...
This circuit is an inverting amplifier with an output voltage swing from essentially 0 to +300 V....
A typical liquid crystal display inverter circuit (OZ965) It shows a typical liquid crystal...
Figure 16-29 (a) of the trigger output via a resistor R2; FIG 16J29 (b) for the introduction of...
characters left: