Graphic Equaliser 537
#graphic equalizer
#audio processing
#sound control
#frequency adjustment
#audio filter
#schematic
#signal processing
#equalization
#stereo
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Equalization Circuit
2 versions of the equalization circuit, the first having 6 dB less insertion loss than the other. However, some may not be able to find a 0.68 microfarad capacitor. The second version uses a more common 0.22 microfarad capacitor. Both...
Interpolating Scanner Circuit
This design is for an interpolating scanner, a circuit featuring multiple signal inputs, a control voltage input, and a signal output. The output selectively transitions between inputs, smoothly fading from one to the next as the control voltage increases. A...
5 Band Graphic Equalizer Circuit
This circuit is a graphic equalizer that can be built with a low component count and is controlled using the LA3600 single IC chip. The internal design of the chip utilizes a transistor gyrator circuit, with connections to external capacitors...
Stereo Preamplifier and Bass-booster
This preamplifier was designed to cope with CD players, tuners, tape recorders etc., providing a gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently fitted with small loudspeaker cabinets, the bass...
building my own aux circuit car stereo feedback
The layout of the PC board led to the decision to insert a stereo 3mm canceling type jack (5 pin) at the volume control chip inputs, which was mounted on the front panel. A suitable jack was not available in...
Discrete components sound and light control stairs delay switch circuit 4
This circuit describes a sound and light control delay system for a walkway stairs light switch. It involves various components including 220V AC electric bulbs, diodes (VD1-VD4), and resistors. The circuit utilizes a rectifier regulator to stabilize the voltage supply....
Variable-Frequency Audio Bp Filter Circuit
This variable-frequency audio bandpass filter is constructed using two 741 operational amplifiers (op amps) connected in cascade. Both op amps are configured as identical RC active filters, enhancing the selectivity of the overall circuit. The filter has a tuning range...
Mini-stereo
This circuit is constructed using two integrated circuits: the MC1458 dual operational amplifier, configured as a preamplifier, and the LM378 dual 4-watt amplifier. The gain of the preamplifier is determined by the resistor ratios R3/R1 for one channel and R4/R2...
stereo balance indicator
This stereo balance indicator circuit diagram is designed using a few common external components. The schematic circuit is very simple to build and will provide a visual indication with LEDs for left, right, and center balance. Outputs from each channel...