Speed Controller for brushed electric motors
Posted on Dec 25, 2012
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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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It is important to know that transistors Q1,Q2,Q3 must not work like an astable (tri-phase)...
This circuit was designed to charge NiCad battery packs in the range of 4.8 to 15.6 V from a...
IC2 forms a stable oscillator whose frequency and pulse width is determined by the values of R4,...
The back to back diodes are there because some radios present high voltage transients when...
Volt meters & ampere meter with PIC can be used to measure voltage and current simultaneously....
This broadband frequency-upconversion mixer, which has been simulated with and without a novel...
This is the circuit diagram of a simple electronic combination lock using IC LS 7220. This...
This project uses an LM3915 bar-graph IC driving two sets of ten LEDs for a 30dB range. The...
Some relays will become warm if they remain energized for some time. The circuit shown here will...
The flash that is built into digital cameras is designed for indoor photography. At subject...
The SCR is wired across the trigger circuit of the flash gun. Normally, the SCR is off, so the...
Europes leading SGS-THOMSON STMicroelectronics recently introduced a tone quite new to the...
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