Easy-auto-alarm
Posted on Sep 25, 2012
New Circuits
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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.....
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The circuit is a simple rf-actuated switch which will respond to any strong field in the region...
The premise of the circuit is this: I want to power L1 coil with square pulses. You can see I`ve...
The first BC109C transistor is acting as a buffer. It provides the circuit with a high input...
This circuit is based on a very old application note from exar, in this the frequency is fixed by...
Low power ( 3 to 30 MHz) transmitters constructed by hams are generally called QRP`s. For such...
This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency...
These two headlight reminder circuits are easy to install and operate on the KISS (Keep It Simple...
U1a operates as a low-noise microphone preamp. Its gain is only about 3. 9 because the high...
Diode D1 and resistor R1 provide the VDD isolation when programming the 24 pin devices. The...
The circuits looked at so far depended for their functioning on linear feedback. The magnitude of...
The chassis is made of aluminum L-profile (30x30x2 mm) and the candles are made of 13 mm aluminum...
Home-made antennas can greatly improve the performance of AM and FM radios, short-wave receivers,...
The device emits ultrasonic sound waves that sweep between 65, 000 and 25, 000 hertz. Designed...
LTC1043 can be .png">induced through any of its current shunt supply rails. Many cells...
By LK16-5/31 type master controller and PQY2 Series Magnetic control panel consisting of a...
Circuit from the AD596/597 form a temperature measurement and control instrument is shown in...
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