https://wekaosd.home.blog/2020/07/29/colour-osd-improvements/https://wekaosd.home.blog/wp-content/uploads/2020/07/new_interrupt_sequence.pngNew interrupt sequenceNew interrupt sequencehttps://wekaosd.home.blog/wp-content/uploads/2020/07/old_interrupt_sequence.pngOld interrupt sequenceOld interrupt sequencehttps://wekaosd.home.blog/wp-content/uploads/2020/07/colour_bars_3.jpgFurther improved colour barshttps://wekaosd.home.blog/wp-content/uploads/2020/07/new_dds_connection.pngNew DDS connectionNew DDS connectionhttps://wekaosd.home.blog/wp-content/uploads/2020/07/colour_bars_2.jpgImproved colour barsSuper smooth colours!2020-08-10T01:12:55+00:00monthlyhttps://wekaosd.home.blog/2020/06/01/a-new-approach-using-dds/https://wekaosd.home.blog/wp-content/uploads/2020/06/jitter_investigation.jpgjitter_investigationhttps://wekaosd.home.blog/wp-content/uploads/2020/06/colour_bars.jpgNTSC Colour bars14 hues of colour are being generated, overlaid onto a video signal. Some phase noise is present in the form of rolling vertical colour changes. However colour is consistent horizontally across each scan line.https://wekaosd.home.blog/wp-content/uploads/2020/06/comparator_output.pngcomparator_outputhttps://wekaosd.home.blog/wp-content/uploads/2020/06/mixing_luma_chroma.pngmixing_luma_chromahttps://wekaosd.home.blog/wp-content/uploads/2020/06/horz_scan_phase_inconsistency_2.pnghorz_scan_phase_inconsistency_2DDS phase consistencyhttps://wekaosd.home.blog/wp-content/uploads/2020/06/horz_scan_phase_inconsistency_1.pngDDS phase inconsistenciesDDS phase inconsistencieshttps://wekaosd.home.blog/wp-content/uploads/2020/06/ad9833.jpgad9833https://wekaosd.home.blog/wp-content/uploads/2020/06/clamp_comparator.pngclamp_comparatorhttps://wekaosd.home.blog/wp-content/uploads/2020/06/pic_dds_prototype.jpgDDS prototype2020-07-30T09:58:20+00:00monthlyhttps://wekaosd.home.blog/2018/10/18/the-journey-begins/https://wekaosd.home.blog/wp-content/uploads/2018/10/20190122112939-2859.jpg20190122112939-2859MyFlyDream Crosshair - full colour, true graphicshttps://wekaosd.home.blog/wp-content/uploads/2018/10/IMG_20181223_083159_resized.jpgIMG_20181223_083159_resizedWekaOSD at 23/12/2018https://wekaosd.home.blog/wp-content/uploads/2018/10/alceosd_0v1.pngAlceOSDAlceOSD - grayscale graphicshttps://wekaosd.home.blog/wp-content/uploads/2018/10/eagletree-vector.jpgEagletree VectorEagletree Vector OSD - full colour, true graphicshttps://wekaosd.home.blog/wp-content/uploads/2018/10/playuav.jpgPlayUAVPlayUAV - black and white, with graphics. Camera feed is not shown here.https://wekaosd.home.blog/wp-content/uploads/2018/10/minimosd-multiwii-osd-full.jpgMWOSD displayOutput from a Minim OSD using custom firmware over a black screenhttps://wekaosd.home.blog/wp-content/uploads/2018/10/img_20180902_153519.jpgVideo Experimenters BoardVideo Experimenter's Board, prototype OSDhttps://wekaosd.home.blog/wp-content/uploads/2018/10/img_20181027_192346.jpgMinim OSDMinim OSD board2020-06-04T22:59:19+00:00monthlyhttps://wekaosd.home.blog/2019/10/01/schematic/https://wekaosd.home.blog/wp-content/uploads/2019/10/encoder_schematic-1.pngEncoder_SchematicAD724 encoder, genlocked2022-09-08T00:27:14+00:00monthlyhttps://wekaosd.home.blog/2018/12/03/new-mcu/https://wekaosd.home.blog/wp-content/uploads/2018/12/img_20181201_023844.jpgFull frame buffer360 * 288 frame buffer, instruments in white. Notice how much better the text looks.2019-09-15T22:51:19+00:00monthlyhttps://wekaosd.home.blog/2019/09/09/the-switch-works/https://wekaosd.home.blog/wp-content/uploads/2019/09/switchoverlayrainbow1.jpgSwitch OverlaySwitch timing now coincides with the pixel output.2019-09-09T09:53:14+00:00monthlyhttps://wekaosd.home.blog/2019/07/01/new-boards-complete/https://wekaosd.home.blog/wp-content/uploads/2019/07/lm1881-signals-ntsc.pngLM1881 Signals NTSCNTSC sync signalshttps://wekaosd.home.blog/wp-content/uploads/2019/07/fsc-clock.jpgFSC Clock3.58MHz clock locked to colour subcarrierhttps://wekaosd.home.blog/wp-content/uploads/2019/07/timingboard2.jpgVideo Timing BoardVideo Timing Board connected to my Runcam 2, running from a 5V switching power supply.2019-08-31T23:52:12+00:00monthlyhttps://wekaosd.home.blog/2019/09/01/updated-timing-board/https://wekaosd.home.blog/wp-content/uploads/2019/09/timingboard3.pngTimingBoard32019-08-31T23:51:23+00:00monthlyhttps://wekaosd.home.blog/2019/08/18/the-switch-is-early/https://wekaosd.home.blog/wp-content/uploads/2019/08/switch_norc_1usdiv.jpgSwitch_NoRC_1usDivSwitch signal, no delay and sharp edgeshttps://wekaosd.home.blog/wp-content/uploads/2019/08/switch_47pf4kr_1usdiv.jpgSwitch_47pF4KR_1uSDivSwitch signal, with RC delayhttps://wekaosd.home.blog/wp-content/uploads/2019/08/switchoverlay_47pf4kr.jpgSwitchOverlay_47pF4KRDelaying the switch with an RC network of 47pF and 4K. The delay is gone but there is a blue "halo" in its place, and the switch cannot toggle faster than the delay.https://wekaosd.home.blog/wp-content/uploads/2019/08/switchoverlay_norc.jpgSwitchOverlay_NoRCNotice the black bar to the left of the white bar. This is because the pixel switch is faster than the pixels.2019-08-22T23:04:41+00:00monthlyhttps://wekaosd.home.blog/2019/08/11/overlay-take-2/https://wekaosd.home.blog/wp-content/uploads/2019/08/overlaytrace2.jpgOverlayTrace2Overlay trace. Note the switching artefact.https://wekaosd.home.blog/wp-content/uploads/2019/08/overlay2.jpgOverlay2RGB overlay - no fake, and full sats2019-08-26T00:30:18+00:00monthlyhttps://wekaosd.home.blog/2019/08/03/overlay/https://wekaosd.home.blog/wp-content/uploads/2019/08/testsetup.jpgTestSetupMy test setup.https://wekaosd.home.blog/wp-content/uploads/2019/08/overlaytrace.jpgOverlayTraceSync tip, colour burst, active video, overlay. The horizontal trace looks thick due to noise.https://wekaosd.home.blog/wp-content/uploads/2019/08/overlay.jpgOverlayIn fact the real image looks worse. The colours look more saturated in the photo than they do in real life.2019-08-03T10:15:10+00:00monthlyhttps://wekaosd.home.blog/2019/07/30/genlocked/https://wekaosd.home.blog/wp-content/uploads/2019/07/rainbow-test-pattern.jpgRainbow test patternRainbow test pattern, genlocked to incoming videohttps://wekaosd.home.blog/wp-content/uploads/2019/07/cvbs-scope-trace.jpgCVBS scope traceScope trace. Horizontal sync is the short low pulse and the colourburst is the short sinewave following that.2019-07-30T06:00:02+00:00monthlyhttps://wekaosd.home.blog/2018/10/22/assembly-text-rendering/2019-07-25T23:24:39+00:00monthlyhttps://wekaosd.home.blog/2018/11/14/chroma-transients/https://wekaosd.home.blog/wp-content/uploads/2018/11/pointer.pngAltimeter pointerAltimeter detail, vertical and diagonal lines are faint2019-07-25T23:22:10+00:00monthlyhttps://wekaosd.home.blog/2018/11/25/migrated-to-stm32f413/2019-07-25T23:19:27+00:00monthlyhttps://wekaosd.home.blog/2018/12/18/progress-and-some-new-ideas/https://wekaosd.home.blog/wp-content/uploads/2018/12/IMG_20181216_102043_resized_20181217_114206286.jpgProgressPitch ladders, heading, RTH arrow, it's starting to look good. Pity the Armed warning is covered up, but that will be soon fixed. It's time to get rid of the rainbow test pattern.2019-07-25T23:18:56+00:00monthlyhttps://wekaosd.home.blog/2019/02/08/new-approach-new-ideas/2019-07-25T23:17:59+00:00monthlyhttps://wekaosd.home.blog/2019/03/08/revisiting-the-ad724/2019-07-25T23:17:23+00:00monthlyhttps://wekaosd.home.blog/2019/03/22/new-board-designs/2019-07-25T23:08:42+00:00monthlyhttps://wekaosd.home.blog/2019/07/11/video-on-loss-of-sync/2019-07-25T03:59:49+00:00monthlyhttps://wekaosd.home.blog/2019/03/10/testing-the-clamp-output/2019-04-05T22:30:28+00:00monthlyhttps://wekaosd.home.blog/2019/03/09/clamping-and-measuring/2019-08-01T23:53:34+00:00monthlyhttps://wekaosd.home.blog/2019/02/22/current-draw/2019-04-05T22:18:42+00:00monthlyhttps://wekaosd.home.blog/2019/01/28/revised-font-system-and-other-changes/2019-01-27T18:04:29+00:00monthlyhttps://wekaosd.home.blog/2018/11/23/schematics-released/2018-11-23T04:35:39+00:00monthlyhttps://wekaosd.home.blog/2018/10/27/progress-so-far/https://wekaosd.home.blog/wp-content/uploads/2018/10/img_20181027_015828.jpgSample OutputSample output generated by an STM32F407 over a camera feedhttps://wekaosd.home.blog/wp-content/uploads/2018/10/img_20181027_183443.jpgVideo Experimenter's BoardClose up of VEB showing the 2 video ICs2018-11-12T00:28:40+00:00monthlyhttps://wekaosd.home.blog/2018/10/27/what-i-have-already-tried/2018-11-12T00:25:19+00:00monthlyhttps://wekaosd.home.blog/2018/11/12/frame-buffer/2018-11-11T22:56:52+00:00monthlyhttps://wekaosd.home.blog/blog/2018-11-11T21:43:43+00:00weekly0.6https://wekaosd.home.blog/weka-osd/https://wekaosd.home.blog/wp-content/uploads/2018/11/img_20181111_173230.jpgsdrArtificial horizon, airspeed and altitude indicatorshttps://wekaosd.home.blog/wp-content/uploads/2018/11/img_20181027_015828.jpgsdrsdrhttps://wekaosd.home.blog/wp-content/uploads/2018/11/img_20180902_153441.jpgsdrRainbow test pattern2018-11-11T21:33:37+00:00weekly0.6https://wekaosd.home.blog/contact/2018-10-29T08:34:01+00:00weekly0.6https://wekaosd.home.blogdaily1.02022-09-08T00:27:14+00:00