Bias power board for microphone mods, such as building a high quality condenser mic.
The PCB can provide up to around 50V to suit a true condenser mic capsule. The input to it is typically around 9V from the mic audio board.
If this and the audio board are used as a pair and mounted back to back, the pads for wire links between them line up.
These are bare printed circuit boards only, to suit the assembly a microphone audio PCB and/or a bias power PCB.
No other components are included.
The pictures of assembled PCBs and the converted microphone are purely to illustrate possible uses of these circuit boards.
Note that the assembled microphone was built with prototype PCBs which have slightly different component overlay printing to the final versions. The individual built boards are assembled on the same PCBs as listed.
Full details of suitable components, schematic diagrams and further information is in the project page here - see the Parts list and schematic links:
Microphone mod boards
The PCB mounting holes are spaced to suit the common low cost BM800 - NW700 - NW800 etc. cheap electret microphones usually listed as "studio condenser" types for around £15 or less.
They can of course be used with other casings or in DIY assemblies, but some form of mounting adaption may be needed.
The end result are totally dependant on the types and quality of the components used to assemble the boards; I include suggestions and/or part numbers in the parts list to aid identification and purchasing of the components.
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