
I took an antique Sperti Faraday N276001 cast iron school fire alarm bell and rewired it to plug into an outlet with a big button on the front. This project requires basic electronics tools and an optional vinyl cutter for the label. This bell was built to be used in a high school engineering and en...
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jacobrichmanContinue Reading »from Instructables: exploring - featured http://ift.tt/1YhT1iq
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