Previous Image gpio-driving-npn-and-led An NPN transistor can be used to act as a switch controlled by a low-voltage micro-controller switching a high voltage or high-current load. Please link to us if you find the information helpful ...<br>TwitterFacebookPinterestDiggLinkedinRedditStumbleUponTumblr Please link to us if you find the information helpful ...<br>TwitterFacebookPinterestDiggLinkedinRedditStumbleUponTumblr