100 Led Stereo Vumeter Circuit with LM339 and LM393
link https://320volt.com/lm339-ve-lm393-ile-100-ledli-stereo-vumetre-devresi/
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https://www.youtube.com/watch?v=SdIEpMFEw20
Otomobiller için cam silecek üretimi kauçuk işleme http://320volt.com/otomobiller-icin-cam-silecek-uretimi-kaucuk-isleme/
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https://www.youtube.com/watch?v=eVvFx3I1jfY
Electric Shaver 5V adapter instead of battery https://320volt.com/pilli-tras-makinesini-adaptor-ile-calistirma/
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https://www.youtube.com/watch?v=4elXbplL5cc