Previous Image DIY opto-isolator with Darlington Figure X. Increasing the current transfer using a Darlington transistor. Please link to us if you find the information helpful ...<br>TwitterFacebookPinterestDiggLinkedinRedditStumbleUponTumblr Increasing current transfer using a Darlington transistor. Please link to us if you find the information helpful ...<br>TwitterFacebookPinterestDiggLinkedinRedditStumbleUponTumblr