<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">Am 26.06.2024 um 15:51 schrieb Roman Sowa via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>>:</div><br class="Apple-interchange-newline"><div class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Maybe better to use TVS across the LED</span></div></blockquote></div><br class=""><div class="">Hmm, usually there’s already a standard silicon diode (1N914 etc) anti-parallel to the LED, for reverse-voltage protection. Would an additional TVS do any good here? The LED or the silicon diode would conduct at a much lower voltage than the TVS.</div><div class="">If there’s a really nasty spike, the 220-ohms-resistor would have to absorb most of its energy, no matter which of the diodes/TVS conduct. Or do you mean to connect the TVS _before_ that resistor?</div><div class=""><br class=""></div><div class="">Ingo (remembering endless discussions with colleagues on the use of TVS diodes and varistors…)</div></body></html>