A relay is essentially an electrically operated switch it has a coil that uses magnetism to close the contacts on the switch. In automotive terms 12V running through the coil will allow 12V to run through the switch contacts. So why is a relay useful You can use a low-power source to energise the coil to switch power to a high-power device (lik
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e a horn!) The circuit diagram below shows the installation of a relay into the existing horn setup. All the existing circuit is shown in black, and the new addition is shown in blue. You want to disconnect your existing horn and connect its wires to the coil of the relay. This means that when you press the horn button it will provide power to the coil. You want to connect one of the switch connections of the relay to the positive side of your battery - with its own wire and fuse (you are essentially creating a new fused circuit for your bike). The other relay switch connection wants to be connected to your new horn(s). The remaining connection on your horn needs to be run back to the negative terminal on your battery to complete the circuit. Some relays come with an in-built fuse holder (which saves work, left), but a separate fuse holder would also be fine. You can also get pre-wired bases (right), or you could use spade lugs. The Stebel Magnum is an electromagnetic horn that puts out 136dB (at 4 inches, 112 @ 2m) from 6A of current. It is available in 500 and 410Hz. It can be easily mounted underneath the bottom triple on F-models, or inside the side fairing. Due to its size it is not particularly suited to E-models without looking like a glaring addition. (shown above next to a stock-sized horn) You can achieve the same volume as the Magnum by using 2 HF80 discs. They come as a dischordant pair, emitting 340 and 430Hz...
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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