Build a Variable Voltage Supply for Cheap
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 is a new circuit I just finished. I like the white LED lighting, it is softer and give a...
The present document shows step by step how to easily build an interesting pointing device: the...
The transmitter consists of an oscillator which drives a high output IR emitting diode. The...
This high-performance charger quickly charges gelled lead-acid batteries, and turns off at full...
August, 2007One of my other hobbies is photography, and, about a year ago, I purchased a new...
The ADM660 is a charge-pump voltage converter that can be used to either invert the input supply...
This Low Dropout Voltage (LDO) solar charge controller uses a simple differential amplifier and...
To connect it to the ATMEGA168, I followed the suggestion from the datasheet: the buzzer if...
With this circuit you can power-ON or Power-OFF a lot of electric/electronic devices such as aDSL...
By adjusting its Adjust pin, output voltage and current can beregulated. VR is placed between the...
Here`s The schematic shown below is a simplest LED flasher circuit. The circuit is using three...
This unit employs a dual trace oscilloscope with X-Y function as a display to test and...
This phone is loud ringing tone circuit for generating the electricity bell in the old telephone....
As a result of the circuit shown in Darlington type phototransistor as the sensing element, the...
As shown in Fig ten temperature detection circuit circuit. The detection circuit by the...
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