4-Decade Square-Wave Generator
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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Some channels offer a separate audio mode (SAP) in a second language. It is usually transmitted...
ArduinoISP Bootloader/Programmer Combination Shield (not shown) & Arduino with USB to serial chip...
As I carry out a lot of repairs on C. B. and audio equipment, I need a variable power supply with...
This is a design for fire alarm circuit. This circuit is based on a LDR and lamp pair for sensing...
These have two coils and are controlled by changing the direction of the current flow through the...
Microcontroller design where the mcu is placed in hibernation mode, and can only be awoken by a...
This circuit liquid level sensor is using a simple and common operational amplifier IC 741 used...
The IEEE-1284 bus defines a parallel printer bus specification with speeds above 1MBps. IEEE-1284...
The machine used a 12 digit display (8 LED anodes scanned by an Anode driver, and 12 `digits`...
An increasing number of appliances draw a very small current from the power supply. If you need...
I designed the PC Power-on Combination Lock (PCPCL) last year for my GCSE Systems & Control...
Fluorescent tubes use far less energy than incandescent lamps and fluorescent tubes last a great...
As shown, a diode as a temperature sensor application circuit. Circuits, silicon diodes VD1 and...
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