Vup.１００円ブザーで金属探知機 Metal detector with 100yen buzzer.
Making a Metal detectort with 100yen buzzer. Buzzer circuit mistake corrected. １００均の防犯ブザーを改造して金属探知機を作ってみました。 一度アップしましたが回路図に誤りが有ったので修正して再アップです。 宜しければBLOGもご覧下さい。 http://diyelec.blog.fc2.com/
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