Digikey is a large $500 million dollar company with thousands of employees. One of them made an official video on how to make throwies (!?) using digikey parts. I like the disclaimer at the end, and the boppin’ background music. I hope they start making & selling kits!
First of all, thanks for this post! We always appreciate the support. Regarding your question Jaanus, in this application the battery used is 3v. The led’s used in this video have a forward voltage right around 3v. As long as you do not exceed the maximum forward voltage of the Led, a current limiting resistor is not needed. This information can be found in the Mfg’s data sheet. Should you put two 3v batteries together in series to give you 6v then you would need to add the current limiting resistor.
Once again, thanks for the post, and please let us know if you have any further questions!