Editor's Note: Due to the comments at the end of this article, the author has agreed to change the circuit slightly to reflect three AA batteries in series (which agrees with the photo of the battery holder in Figure 1). This will alleviate the problem of placing batteries in parallel in the circuit. As for different chemistries, it was not the intent of the author to encourage the use of different battery
Register to view the full article
By registering on Electronic Design now, you'll not only gain access to premium content, you'll also become part of an exclusive, robust global engineering community!
Participate in Expert and Reader driven Q&A's
Start your own conversation by commenting on any article or blog
Download high-quality content including the highly anticipated Salary & Career Report