5W Chinese PLL FM Transmitter With LCD Printed Circuit Board (PCB)
Posted on Jun 1, 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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You can use this powerfull amplifier in any small audio project. It is very small (6.5 x 4.5...
A simple circuit with which we have the possibility opening and closing the RL1 contacts. He...
Flashing occurs each time the capacitor discharges through the tumed-on SCR. When the discharge...
When Sl is depressed, Cl begins to charge to the supply voltage. That places a forward bias on...
A diode (IN4148) is used as a temperature sensor. IC2 is an A/D converter with BCD output. A refere
A fixed current flows through any load that is connected between the positive supply and Ql"s...
An LCD -liquid crystal display is an electronically-modulated optical device made up of any...
This is design circuit for converter meter voltage to frequency. Normally we often encountered...
This circuit uses a single chip, IC TL074 for achieving a 5-band graphic equalizer for use in...
This stage may be driven by another resistance coupled amplifier stage in which case the resistor...
This is a long range stable FM transmitter circuit. The circuit is using a LM2950 5V voltage...
The 1956 Regency ATC-1 converter heralded the dawn of a new era for amateur radio. The little...
A simple level power meter to provide high-fidelity sound system bar or dot matrix display. Green...
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