6W Warble-Tone Siren
Posted on Apr 8, 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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This indicator is basically a switch with hysteresis characteristics. If the input voltage...
The persona] message recorder is built around an ISD1016 CMOS voicc messaging system, which does...
We created an RC Car that can identify a parking space and parallel park by itself. The RC Car...
DCF77 Preamplifier Circuit DiagramA popular project among microcontroller aficionados is to build...
The circuit below uses two quad voltage comparators (LM339) to illuminate a series of 8 LEDs...
Circuit Fear not, dear reader - I haven`t given up the sauce. I am not in withdrawal, suffering...
The function of this automatic volume control circuit is to amplify signals without distorting...
You can choose the Transformer on the grounds of maximum voltage and current output needed. Best...
This article is in the "you can do it too" category. It`s not as difficult as you can imagine for...
The following is a translation of a section from the first book of the 3 part series "Die RG¶hre...
RF Cafe visitor Jim L. requested that I post this Build Your Own Vibrato article from the...
Uses National have sound. MM57100 TV game chip to provide logic for generatingbackgrounds,...
East Shi IDS-2000F STB switching power supply circuit East Shi IDS -2000F STB switching power...
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