Fans decorative light circuit in Figure 2-130, the circuit consists of step-down rectifier circuit, lattice specific integrated sound and light control roads and other componen
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ts. Core device circuit is LC189. This decorative lamp is the use of different voltage amplitude on the inductor fan speed, forcing LC189 control different LED flash frequency, voltage, high frequency fast flash, slow and vice versa. Resistance Rl ~ R3 connected on three-block fan speed control switch, the capacitor C1 is coupled to the input of LCI89 8 feet. R4 and C2 are manifold outer contact oscillation RC components. Circuit output waveform frequency because the amplitude of the input signal varies, the output of A ~ D row and column output terminal f ~ r connected to 4x4 dot matrix, between the light emitting diode LED1 ~ 16 connected row line and column line, arc tube to press on section Figure 2-127 shows the level change and shiny, which can be formed is wonderful visual effects. Resistor R6 ~ R9 current limiting resistor of the arc tube, which along with the power supply voltage level may be, the machine uses 6V DC power supply, it is appropriate resistance 120 Q, if the power supply voltage of 12V, current limiting resistor should be increased to 390Q.
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....
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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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