Four-decade variable oscillator
Posted on Jul 27, 2012
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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This circuit develops an output voltage that is proportional to the magnetic induction, B,...
This circuit made from an infrared phototransistor and infrared LED. This transducer works with...
The transition from diodes to synchronous-rectification (SR) MOSFETs in secondary circuits of...
Intercom walkie talkie are the next logical step in this discussion. They show how a crystal...
As shown by the block diagrams in Figure 1, overall signal flow in this five-input mixer was...
This musical light alarm circuit is very simple, uses only 7 components, a LDR and a 3. 6 V...
An audio cross-over network is used inside a speaker to separate or filter audio signals of...
The Finder is a prototype of that device. It is a keychain-sized GPS device with two buttons,...
AC voltage is rectified by a bridge (VD1-VD4). 3R1 limiting buck, VD5 clipping, a trapezoidal...
As shown relay delay pull transistor circuit. Just power, 16 F capacitor voltage is zero, two...
DC panel battery is widely used in power plants, substations DC system. To make the current...
Electronic decorative peacock composed of 10 light-emitting diodes, each light emitting diode...
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