1. Add potassium tartrate and sodium carbonate to a beaker with water.
2. turn on the heater until the solution becomes clear.
3. remove the impurities in the clear solution using filter paper and pour the filtered solution into a container and wait for it to crystallize.
4. Strike the crystallized piezoelectric element and see if it generates electricity.
5. Assemble the piezoelectric element onto a piezoelectric plate.
6. Try tapping the piezoelectric plate with a hammer or hitting it with a ball to turn on the lantern and charge the battery.
comfort | ⦾ Comfortable |
age rating | 0+ Everyone |
website | training.contentsda.kr |
developer | ContentsDaInc |
publisher | ContentsDa Inc |
connection | Internet not required |
app version | 1.0 |
languages | English ∙ Korean |