Beeper Circuit
Posted on Dec 18, 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 hardware is shown in the picture (might take a little while to load). Don`t be the least bit...
The schematic requires few components, because the timer function has been incorporated by...
The heart of the circuit is IC2, a 50240 top-octave generator. That device uses a single...
This low cost, crystal-controlled oscillator uses one TTL gate. Two factors ensure oscillator...
Two hybrids (Tl and T2) are used to allow direct connection to a telephone line. This circuit...
This is a fun and useful circuit for demonstrating high frequency high voltge. It can produce up...
The Triac drivers use the 5 VDC output signal from the 74HC595 chip outputs (Q1, Q2, Q3, Q4, Q5,...
A line follower robot, or a LFR in short, is a simple autonomous robot that optically tracks a...
This is very stable, harmonic free, long range fm transmitter circuit which can be used for fm...
The WWVB signal is broadcast as a 60 kHz carrier that is AM modulated with a time code frame that...
The amp appears to be unused, still has the plastic film stuck to it. One of the 211`s has a...
A TRIAC driver board for use with my reflow toaster oven project, which means mains voltages....
A strobe light passes a brief, intense pulse of electric current through a gas, which then emits...
The FDK Multi-750e was launched in the UK in 1981. A 2m ham radio multimode tranceiver, at a good...
How to use a desktop computer to solve the complex arithmetic needed to design state-variable...
AD524 low-drift (drift voltage 0.5mV, maximum drift 25 mV door C), low noise (0.3mVp p,...
As shown for the bandwidth of 10MHz broadband linear detection circuit. The circuit is the...
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