Mixer
This mixer was developed for the order of one of my familiars, who treats music (disco).
The main parameters as follows:
- 4 pcs micro / line modul (mono input)
- By all of the micro / line moduls is base gain regulation for the stereo output
- 4 pcs phone / line modul (switch over)
- By all of the moduls is a peak indicator installed
- By all of the moduls (in- and output moduls) is a three band equilizer installed
- All of the moduls has an monitor output
- By all of the moduls (in- and output moduls) is balance controll installed
- By the output modul is the common volume controll
- Symetric and assymetric output
- Power controll realised with LED’s
- Headphone output as well from mixed, as frm monitored moduls
- All of the moduls join in a common track
This all is installed in a alu case.
As I already mentioned, based on the ownership I will not publish on my site all of the moduls, and I don’t give details for the remake.
The basic idea of this was published Elektor journals between 1980 and 1989.
Micro modul
This modul is developed for processing of microphone (mono) and instruments signal.
The output at the most of the instruments is not stereo, than mono. Based on, and for the need of my customer are 4 modules like it placed in the mixer. It makes the mixer able to be used by smal ensemble.
Line modul
This modul is designed for processing of stereo signals.
The inputs can be switched over between phono and line. My customer was asked 4 pcs of this modul.
Power modul
This modul is the power supply of the mixer.
This modul has to transform the 230V AC, take care for the rectifying and the first level ageing.
Out 1 modul
This modul takes care for the symetrical and assimertical outputs. Furthermore it contains the power control with LED’s.
Out 2 modul
This modul contains the effect output, the monitor output and the headphone amplifier of the mixer.
By clicking on the pictures the shematics can be downloaded as PDF format, but I don't offer PCB design for.