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![12V Mic Circuit Diagram : Speaker Microphone Circuit Circuit Diagrams](https://i.ytimg.com/vi/SZaVAgqeAlk/maxresdefault.jpg)
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How to Make a Matchbox Microphone - YouTube
![Additions to the 250 Series Matchboxes](https://i2.wp.com/www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1959/09/page46/fig1.jpg)
Additions to the 250 Series Matchboxes
![Matchbox Microphone : 9 Steps (with Pictures) - Instructables](https://i2.wp.com/content.instructables.com/ORIG/FW5/G9NH/I7VQO5O0/FW5G9NHI7VQO5O0.jpg?auto=webp&frame=1)
Matchbox Microphone : 9 Steps (with Pictures) - Instructables
![How to Make a Matchbox Microphone - YouTube](https://i.ytimg.com/vi/tCBontBg0LY/maxresdefault.jpg)
How to Make a Matchbox Microphone - YouTube
How was it made? - The Matchbox Microphone (PBL PROJECT)