AmplifierCircuits

This circuit exploits the high slew rate, high input impedance, and high output-voltage capability of CA3140 BiMOS op amp. It also provides mid-band unity gain with standard linear potentiometers.  Baxandall Tone-Control Audio Amplifier

The mixer can be multiplexed between the SLF and VCO functions.  For two simultaneous race-car sounds.

Building a subwoofer box is the foundation of your new car audio system . In this video I will show you different techniques that will make your sub enclosure perfect and help it sound even better! How to Build a Subwoofer Box

This is how a subwoofer enclosure is built, it is ported and is tuned to 35hz the subwoofers that i am installing are 2 re 8's that are dual voice coil and i am pushing 300watts at 4ohms. 300W Building a subwoofer enclosure

The aim of this article demonstrate how the Arduino can run on 7-segment display.   We used a SA56-11GWA which is a single display with common anode, it means that the anode is common to all digits, and to the point. A display consists of 8 LEDs, 7 form the figure and 1 point decimal.A conversion between decimal and what we intend to show the binary information that you receive is called the BCD (Binary Coded Decimal). In terms of hardware, each LED work individually, so each of the segments has to lead a limiting resistor, in this case, each digit has an operating voltage of 2.2V and consumes 20mA.   If the voltage is 5volts, we need the resistor fall 5-2.2 = 3.8V, by Ohm's Law we can calculate, R = V  res  / I  led  R = 3.8 / 0.020 = 190 Ω +/- 20% (let's use a resistor with 220Ω).   This applies to this display SA56-11GWA used as an example, other values ​​may be different, it is useful to calculate the required resistance value. Decimal T...

Using a K-12 tube amp with a NAD C542 CD player, there is no need for a buffer or  visit page.  music which the K-12 does so easily. There was always something missing when it came to a convincing delivery. I felt a little of that beautiful valve warmth was required, so I tried a very affordable Valve Preamp kit from Silicon Chip Online. The preamp kit is based around a common 12AX7 dual triode. The line level (Hi-Fi) version of the kit has the gain set at 4 (6 dB). What makes this kit very inexpensive is that power comes a switch mode power supply, fed from a 17 volt DC wall wart!... line level preamplifier. The K-12 is a very polite and sweet amp with all the warmth of it`s `hot bottle` heritage. However, when I compare the K-12 with my monoblock chip amps (LM3875), I was never convinced that the chips amps really delivered the passion of the

A simple electric motor homemade, easy to make. 1. 1 meter of wire 2. magnet 3. one battery AA or AAA 4. Improvisation