Simple lock circuit can alarm
Posted on Nov 10, 2015
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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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This 6V to 12V converter circuit is made with an IC from SGS with several additional components....
Indicator was designed for displaying the peak level of small ac signals from a variety of...
The signal booster, built around a few transistors and support components, offers an RF gain of...
Communication systems using spread spectrum techniques, compare to narrow-band systems are more...
This is a battery charger circuit, this circuit has advantages, which can cut off electrical...
4 Stage FM transmitter circuit diagram. It uses four radio frequency stages: a VHF oscillator...
Setting circles on an astronomical telescope are used as an aid to pointing the telescope at a...
A microprocessor based project Microprocessor-Based Home Security System . This advance security...
Getting ready to put Adrian`s Pololu stepper driver circuit together and have run into a...
The Microchip PIC 16C84 was one of the first serial in-system programmable microcontroller. I saw...
Here is a schematic of a good quality AM radio receiver circuit. The heart of the circuit is...
The input resistance of a. c. -coupled op amp circuits depends almost entirely on the resistance...
I`ve tried to make drivers for my H-bridge circuit using complimentary emmiters but the square...
About all that can be said about top octave generators is that they were cute and cheap, compared...
Relays are often used as electrically controlled switches. Unlike transistors, their switch...
By master controller LKl-12/90 and a magnetic disk control PQR10A composed of a control circuit....
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