Automatic-fan-speed-controller
Posted on Mar 9, 2013
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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The figures below illustrate using opamps as active 2nd order filters. Three 2nd order filters...
The circuit consists of two basic circuits, the oscillator and the detector. The oscillator uses...
The LT1007 is capable of providing excitation current directly to bias the 350-0 bridge at 5 V....
This circuit produces an output pulse when SW1 (pushbutton) is depressed. It also becomes a...
This project demonstrates a number of aspects of the PIC16F687 microcontroller, like: ultra low...
This section of code outlines the main sequence of operation for the sequencer. First, a for loop...
I have an automotive relay (from a scan of a workshop manual I`m afraid) which is rather more...
This is a design circuit for a low cost fm antenna booster that can be used to listen to programs...
This tutorial is about mp3 mode of WTV020SD-16P module. With this simple circuit, you can play...
The bootloader can be used for the all USB PIC devices (PIC18F4550, PIC18F4455, PIC18F2550,...
This article describes a lighting circuit that generates a glowing firebox effect and provides...
The picture shows the use of a linear potentiometer (or linear Hall element) control two chassis...
Temperature stable resistors R1 and R2 NAND gates, they ensure that the switches in the linear...
As shown, the circuit uses type J RTD, its resistance value corresponds to the temperature of...
Automatic telephone responder circuit is shown in Fig. FIG IC2 10 seconds voice recording...
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