The amplified signal is fed to the melody generator via resistor R5. The output of the melody generator is fed to LM386 low-power audio amplifier (IC2) via variable resistor VR1, which works as the volume control. The loudspeaker sounds to indicate a voltage gain of 20, ` which is sufficient for this application. Capacit
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or C3 is used for decoupling of the positive rail and the R-C combination network comprising C4 and R7 bypasses high frequency to ground. The circuit can be easily wired on a general-purpose PCB. Pin configurations of IC LM386, transistor BC547 and melody generator UM66 are shown. principle, converts the IR signal pulse trains into noticeable aural notes. S1 is used to switch on/off mains power and LED1 indicates power on. ` Resistor R4 and zener diode ZD2 form a low-current voltage stabiliser for providing steady 5. 1V DC to the small signal preamplifier circuit. IR LED1 is the main sensing element. The IR signal detected by IR LED1 is amplified by npn transistors T1.
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....
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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....
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