Instructions for Diode Voltage Droppers (DD1 & DD2) Step-by-step instructions for diode voltage dropper kits (DD1 & DD2). Last revised: 7 May 2019 Share this:Tweet Click to share on Reddit (Opens in new window) Reddit Click to email a link to a friend (Opens in new window) Email More Click to share on WhatsApp (Opens in new window) WhatsApp Click to print (Opens in new window) Print