09-02-2016, 06:49 PM
(This post was last modified: 09-02-2016, 06:51 PM by ppppenguin.)
The logic for the standby and testcard works OK. Need to dig out a 5V wallwart and wire up a couple of resistors to the power connector to interface it to the PLD. The panel will then be complete except for tidying up the mounting of the PLD module and dressing the ribbon cables.
LED brightness is a bit variable but can't really do anything about it. It's just that the LED forward voltage is too great a fraction of the 3V3 supply on the PLD board. Shorting out the 47R resistors brightens the LEDs but makes the variability worse so I'll just leave well alone.
Need to wire up the ribbon cable interface to the video router and see if the whole thing works. The waveforms going to the routers certainly look OK on the scope.
Also a short D15 to D15 cable to link the controls through to the audio router. Don't think I have any ribbon cable crimp D15 plugs so I'll have to do it the old fashioned way with multicore cable.
LED brightness is a bit variable but can't really do anything about it. It's just that the LED forward voltage is too great a fraction of the 3V3 supply on the PLD board. Shorting out the 47R resistors brightens the LEDs but makes the variability worse so I'll just leave well alone.
Need to wire up the ribbon cable interface to the video router and see if the whole thing works. The waveforms going to the routers certainly look OK on the scope.
Also a short D15 to D15 cable to link the controls through to the audio router. Don't think I have any ribbon cable crimp D15 plugs so I'll have to do it the old fashioned way with multicore cable.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
