For those interested, here's a link to the 7805 voltage regulator you can buy from Amazon. 10 for $4 postpaid.
https://www.amazon.com/L7805CV-Positive-Voltage-Regulator-Package/dp/B011CPTJWQ/ref=sr_1_fkmr1_1?ie=UTF8&qid=1491993322&sr=8-1-fkmr1&keywords=7805+voltage+limiter
Dan in Seattle