In Progress

mono,stereo audio mixer, equaliser, vu meter, crossover, bms


THIS DEVICE WORKS FROM SINGLE 16,5V battery supply, charged by 19,5V adaptor

i need to create mixing device{both mono and stereo version} with 4 symetricall/nonsymetricall inputs, all with bass treble regulation +-15db

2 are switchable to microhopne with variable{low-high} resistance and sensitivty, these 2mics inputs have also switchable phantom power +48V

other 2 are mostly line in level, still able to drive sound from say mp3 player

there is also one stereo input{made by radio transmitter module, this module is already made} with one direct stereo balanced output {with balance control of the left and right channel and switch to merge channels to downmix this into mono if necessary}, this is connected to the rest of mix device

this input has also potentiometer to control its intensity

mixed signal traveles to master potentiometer then to central constant q equaliser{10band}

there is balanced/unbalanced line out switchable to connect before or afther equaliser

this line out is paralled with radio transmitter{already made} to broadcast master signal, also switchable to pass/not to pass via equaliser, this is set to broadcast at maximum possible level before cliping

then this signal traveles to 2way crossover, 24db likwitz riley aligment, set at 2khz

there is vu meter- 10point, switchable to monitor master signal or to monitor amplifier input signal

as this device works on batteries, it has its bms which in case voltage drops bellow 10V needs to disconnect battery from load, via say relay{but i would prefer transistor}

also this amp is working on 32V signle supply which requires dc dc converter{already made}

this requires capacitor compensation, on in and out of this dc dc

also when start up, amp should be connected delayed, or speaker output should be connected this way

Skills: Electrical Engineering, Electronics, PCB Layout

See more: audio mixer meter, radio drops, power up case, master mixing, master electronics, electrical and electronics engineering, direct supply, case power up, master audio, vu, voltage , treble, stereo, sound mixing, Sound Engineering, sound audio, regulation, power meter, mono, monitor drive, mixing, mix master, meter, high intensity, electrical power

About the Employer:
( 0 reviews ) Kosice, Czech Republic

Project ID: #1305470

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€200 EUR in 8 days
(15 Reviews)