VOGONS


Reply 120 of 390, by matze79

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All PC-Speaker issues are fixed now and now its also short circuit safe.

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Co2 - for a endless Summer

Reply 124 of 390, by keropi

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matze79 are these changes documented so I can replicate them?

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Reply 125 of 390, by matze79

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more or less 😀

i send you a PM keropi.

Carlostex, we working out the bugs, i'm sure it will be avaible soon on serdaco 😀

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Co2 - for a endless Summer

Reply 126 of 390, by ITzTravelInTime

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I hope you post some pcb files or something like that, i'd like to play with the disgn a little bit (just to match the holes and the headphone jack position to use the metal bracket i use for the adlib clone) and also because i'd like to build one from scratch, what a bout availability in the future? i'd like to use it with my upcoming pc xt build

Reply 127 of 390, by root42

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matze79 wrote:

more or less 😀

i send you a PM keropi.

Carlostex, we working out the bugs, i'm sure it will be avaible soon on serdaco 😀

I also still have one of your early prototype boards. Any chance I can upgrade it as well?

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Reply 129 of 390, by matze79

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Just have a little patience 😀 until ~ spring 2019!

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Co2 - for a endless Summer

Reply 130 of 390, by matze79

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still some small adjustments needed, current progress :

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https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 132 of 390, by root42

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God we need someone with a tool for making custom brackets. But yeah, looks lovely!

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Reply 134 of 390, by matze79

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root42 wrote:

God we need someone with a tool for making custom brackets. But yeah, looks lovely!

ah i already have a solution for that into mind 😀

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https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 136 of 390, by matze79

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looks lovley but has EMV problems.. so needs redesign i cut few things on the pcb and wired the gnd and vcc directly to power supply and so on..
still noise inside the signal.

my two testing boards on perfboard did work fine.. so it must have todo with the pcb design..

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https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 137 of 390, by root42

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That is something that eludes me completely. How does one go about reducing noise on the PCB level? I remember one video by Dave from EEVblog where he simply added two layers to an already two layer board, simply by adding one pure GND and VCC plane, iirc. That supposedly reduced emissions as well. Not sure about the physics behind that.

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Reply 138 of 390, by matze79

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this way parasitic capacitance is eliminated i think.

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Co2 - for a endless Summer

Reply 139 of 390, by Tiido

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Planes increase parasitic capacitance, which (un)intentionally helps to round off the signal edges slightly which will reduce emissions. Their main positive effect comes from reduction of loop area on return currents etc., the noise can couple straight into the plane rather than through other stuff elsewhere, so less has to radiate outwards or into other stuff.

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