Five uses tri-state logic audio pen CD4066 555
Posted on Mar 28, 2007
New Circuits
-
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.....
.
FM Wireless Mike can transmit voice signals to any FM Radio receiver 100 meters away. The circuit...
This circuit stores a single morse code message as bits in an EPROM chip, the message is sent to...
To display an rf signal, connect LI to the transmitter and points A and B to the vertical plates...
The alarm uses a fixed-frequency piezoelectric buzzer in conjunction with the cadmium-sulfide...
The first question we would like to answer is: what do we mean nowadays for video processing In...
Attach a 12V fan to this circuit which draws 70mA (0. 007A), so the circuit must have at least...
Consider a simplified circuit of a typical relay as shown in the Fig. 1 usually the relay circuit...
I have created a light computer that generates an effect like the scanner of the car KITT in the...
This cheap frequency meter circuit that we show to you. Suitable for general use in small...
This LM12 audio amplifier circuit will provide a high output power on a 8 ohms or 4 ohms load...
This circuit is very similar with a car radio controlled toy with seven control functions:...
This wideband jammer simultaneously blocks all transmissions within a desired band typically by...
characters left: