Power up a microcontroller with pre-power-down data
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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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In this circuit, there are two feedback paths around an op-amp. One is positive dc feedback which...
The single-chip, burglar -alarm circuit shown uses a dual 556 timer, draws 10 mA of standby...
The noninvertiiig terminal of the op amp is grounded, and the circuit uses the voltage at the...
This is the figure of4Q2 DC Motor Speed Controller Circuit Block Diagramwhich is designed for...
USB Powered, Stereo PC Multimedia Speaker Circuit Diagram. This circuit is powered by 5V DC...
A microprocessor cannot drive a motor directly, since it cannot supply enough current. Instead,...
This portable solar lantern circuit uses 6 volt/5 watt solar panels are now widely available....
This is yet another project born of necessity. It`s a simple circuit, but does exactly what it`s...
A photo relay or light activated relay is a circuit which opens and closes the relay contacts...
Using two of the most basic oscillators you can DIY, this particular circuit works great to...
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