If you’ve been a loyal TinkerLab fan (thank you! you mean the world to me.) you’ll know that I’m happiest sharing projects that live at the intersection of disciplines. Once our awesome and affordable Mason Jar Solar Lights were done, we used them for a fun drawing prompt. On the side that faces up you’ll see solar cells. The solar cells are connected to the battery via a diode. The battery gets charged during the day, and the diode tells the battery current to stop sending a current back to the solar cell at night.Īlso inside the unit is a photoresistor, which senses darkness and signals that the LED should turn on when it doesn’t recognize very much light. Be sure to carefully follow the instructions on your etching cream.įor the tinkerers, after you twist off the top of the light unit, take a look at the underside and you’ll see a battery pack, wires, LED, and controller board.After 60 seconds, my glass was only partly etched, so I did it again and left it on for 3 minutes. Leave the etching cream on for at least 60 seconds (per directions on the bottle).With gloves on, thickly coat the outside of your jar.Place your jar on a piece of cardboard or covered table.Alternatively, you could probably use frosted glass spray paint. I used Armour Etch, found at Michaels and Amazon. I found ours at Osh for $3.99 each. Some won’t fit the mason jars, so be sure to check. Please be cautious, wear gloves, and carefully follow the instructions on the etching cream jar for safe usage. Or I should say that I made a frosted jar with etching cream which is not at all kid-friendly. Etching cream is NOT to be used by children and can burn skin. Use it as a night light, emergency light, or picnic illumination.
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