- Joined Jul 31, 2021
I want to make a mini audio mixer of 5 channels.
Need circuit diagram
Need circuit diagram
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I'll also add to AK's list - "How good does it need to be?"It's not always about what you want. Make an effort - Search for 'audio mixer schematic' (without quotes) to get dozens (hundreds?) of examples. Find one you think will do what you want - which is a secret since you have given exactly zero details about the application, signals, power source, loads being driven, input voltage levels, etc. - and post it here, and we will help.
Thank you very much sir,Both the Condenser-Mic, and the Lapel-(Clip-on)-Mic,
(which BTW is not "Stereo"),
require special-considerations, and/or, a Power-Supply-Voltage sent to them for operation.
A "real" "High-End" Condenser-Mic requires "48-Volt-Phantom-Power".
Fortunately, 98% of the "Condenser-Mics" that You will see on-line are
simply constructed to "look-like" an expensive Condenser-Mic.
Some are pure-garbage, and some are actually quite high in performance.
Prices for "real" Condenser-Mics start at around ~$600.oo.
This means that you really must have the Microphone FIRST, and then build an appropriate
Pre-Amp specifically designed for that particular Model of Microphone.
The "Clip-On" "Lapel", or "Lavalier" type Microphone is normally the best choice for
getting consistent high-quality Audio for Pod-Casting / making Videos,
however, these Microphones usually require Power of some sort.
Some have a built-in "Button-Battery",
and some require external Power, (usually ~5-Volts from a Computer Mic-Jack).
The requirements of the particular Model of Mic that You choose
will determine what type of Jack will be required, ( Stereo or Mono ),
and whether or not a separate Power-Voltage must be supplied by the Mixer.
The "Low-Impedance" "Dynamic" Microphone,
( usually a copy of the ~50-year-old, industry-standard, "Shure-SM-58" ),
makes things very simple,
and will provide generally "good", "average", performance with no headaches.
Limiting your Power choices to ~5-Volts, requires quite a few compromises, but it can be done.
Virtually all commercial Microphone-Mixers use
a "Plus and Minus ~15-Volt" Power-Supply, (~30-Volts).
5-Volts doesn't give You very much "wiggle-room" to work with,
and limits your choices of Amplifiers, (Op-Amps), and will have an Output that is
just barely adequate for a standard "Line-Level" Input.
A 5-Volt supply is also more likely to create higher Noise-Levels, ( background-Hiss ).
This also means that careful setting of Levels between different Amplifier-Stages becomes critical,
and may require quite a bit of "tweaking" to obtain
acceptable performance levels of Distortion and Noise.
A good compromise Power-Supply would be 4- Li-Ion Cells in series,
which would make a Plus and Minus ~7.5-Volt Supply, (~15-Volts).
Batteries are inherently "quiet",
which means less Noise issues to deal with,
plus, they're portable.
Thank you, sir, Thank you very much.. from you I have learnt so many things..The first point is .....
I can not recommend that You purchase a Microphone from China,
( Banggood, Aliexpress, Ebay, Walmart.com, etc., etc., etc. ),
because You really have no idea of what You are going to get.
It will be super-cheap, but the sellers have NO IDEA of what it is that they are selling,
how it works, what the specifications are, how the Jack is Wired,
how much Voltage it requires, absolutely NO Information at all.
There are probably ~10 or more Jack configurations,
so buying a Professional-Level product,
from an Established, Professional Business
will save You a lot of profanities and throwing of Tools.
The Microphone that I found seems to be reasonably priced,
and has a "no-brainer" Mono-Jack, and specified Power requirements.
( it seems that their Site is temporarily broken, the Link might not work )
I've just about finished a Schematic for a Mixer specifically designed for this Model of Microphone,
sit tight .............
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