Arduino drawing on scope xy mode: why filtered pwm is rubbish https://diode.zone/videos/watch/c7d4acf7-74af-4e48-99cc-ae4bb6ca61a6 I'm using an rc filter on pwm to make a dac and draw pics. This is written in assembly for speed, with no divider for the pwm frequency. At 0 and 100% duty cycle the rectangle is excellent but as I draw smaller rectangles by moving the duty cycle of the four points closer to 50%, the lines turn into disasters coz the rc ripple dominates. So I need a better dac if I want scope calligraphy. Tue, 20 Oct 2026 14:56:27 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://diode.zone Arduino drawing on scope xy mode: why filtered pwm is rubbish https://diode.zone/lazy-static/avatars/61b689b7-84d5-43c7-9fa8-e63a7fd1d952.png https://diode.zone/videos/watch/c7d4acf7-74af-4e48-99cc-ae4bb6ca61a6 All rights reserved, unless otherwise specified in the terms specified at https://diode.zone/about and potential licenses granted by each content's rightholder.