A DC motor PWM speed control circuit
Posted on Dec 11, 2010
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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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The pre-distortion circuit described here is extremely simple (Figure 1) and only requires one...
A serial interface and bias supply for the Seiko-Epson G1216N000 using an AT90S2313 because there...
This simple AVR Programmer will allow you to painlessly transfer hex programs to most ATMEL AVR...
This circuit combines a 555 timer with a 2N2222 transistor and an external potentiometer. The pot...
An input rectangular signal is differentiated and short impulses are formed from its edges....
It is developed that the ones that assist driving system intelligent improvement and car...
A circuit of a remote control unit which makes use of the radio frequency signals to control...
This alarm is designed to sound its Siren only once. That is - when the alarm is activated - the...
The XLR connector allows us to connect the microphone`s output to our preamplifier circuit. This...
this project use PIC18F25K20 microcontroller to detect if the sensor change state and it will...
To start with, there is a step-down mains transformer with a secondary winding rated at 24 V/3 A,...
The goal of the project is to develop a system, which uses Mobile technology that keeps control...
The schematic for this project isn`t too, too bad to look at even though it`s not the best...
This is a Eurocard communications board for TDS2020F or TDS9092 computers (or earlier types). It...
As shown in FIG PGA103 constituted by a wide input voltage range of the amplifier. 11.3k with...
As shown is a very attractive Christmas lights circuit. When the power is turned on, lights HL...
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