Free electronic circuit design and schematic diagram
Using this circuit, we can make animated LED for bike turning signal. The Led will blink from the right (LED 1) to the left side (LED 5). You must build the second unit to give the complete left and right t urn signal. For the right turn signal, arrange the LEDs so they blink from the left to the right […]
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Three separated LEDs is used on this battery monitor circuit. For red LED, it’s turn on from 6v to below 11v and turns off above 11v. For the orange LED, its illuminate between 11v and 13v and turns off above 13v. The green LED illuminates above 13v. This battery indication is suitable for monitoring your car battery condition. Green indicate […]
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The LED to flash 5 times per second if the unit is brought close to a live conductor (insulated, and even buried in plaster) capacitive coupling between the live conductor and the probe clocks the counter. That’s caused the 4017 IC divides the mains 50Hz frequency by 10. The unit stops counting, the LED resulting permanently OFF (or permanently ON […]
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Anti-log or exponential generation is simply a matter of rearranging the logarithmic circuitry. The circuit diagram below shows the circuitry of the log converted to generate an exponential output from a linear input. The emitter of Q2 in proportion to the input voltage is driven by amplifier A1 in conjunction with transistor Q1. The collector current of Q2 varies exponentially […]
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We can generate easily many non-linear functions such as X^1/2, X^2, X^3, 1/X, XY and X/Y using logs. Division becomes subtraction, multiplication becomes addition and powers become gain coefficients of log terms. The circuit diagram below shows a circuit whose output is the cube of the input. Actually, by changing the values of R9 and R10 in accordance with the […]
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When you insert peripherals, a problem can occur : The sudden load on the port’s 5V pin usually isn’t purely resistive. This load has a capacitive component that can cause a rapid and high-amplitude rise in current to levels well above the 500mA limit for USB port. When you connect a too-large hard disk to the port, a similar problem […]
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It’s good to use CS3310 because CS330 is a complete stereo digital volume control designed specifically for audio systems. This device has features like 16 but serial interface that controls two independent, low distortion audio channels. An array of well-matched resistors and a low noise active output stage that is capable of driving a 600 Ohm load is included in […]
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