Powering White LEDs in Series or Parallel Connections
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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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A 2N3904 in the base circuit sets the `Q' point of the amplifier. FM subcarrier audio at 4.5 MHz...
This design was developed by request of a correspondent having made a sort of LED candle and...
Data acquisition is the process by which events in the real world are sampled and translated into...
This rf detector can locate low-power transmitters (bugs) that are hidden from sight. It can...
Shield for Arduino designed and based on the module GSM/GPRS SIM900 or the GSM/GPRS & GPS module...
The circuit comprises two sections: charger power supply and LED driver. The charger power supply...
The sound produced imitates the rise and fall of an American police siren. When first switched on...
This article describes an amplifier Audison LR604XR principle. The principle is simple there, we...
This device is used as a reminder to take medicine every day. This device actually contains a...
This is a charger circuit for both NiCd and NiMh Batteries. Some time ago I aquired an old...
It`s most useful application is as a Signal Injector for radios and TV`s. A square wave is the...
As illustrated, the filtering and amplifying circuit composed of two parts. Wherein the filter...
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