You can take some ancient technology like the Baghdad battery which probably was used for something like metal plating and wich you just mix chemicals and enhance the chemical reactions to they were using for this reason, and we can take and put a voltmeter
شما مي توانيد مقداري از تکنولوژي باستان مثل همين باطري بغدادي را که احتمالا براي آبکاري نوعي فلز مورد استفاده بوده است ،انتخاب کنيد که فقط ترکيب شيميايي انجام ميدهد و عکس العمل شيميايي معيني دارد