The step by step build of the Delta Pulse Rev. 5

[Infamy]

Hi KT315,

thanks. Here's an update with the diode...

Rev 1.2 with fuse value

So I read there could be an advantage to having higher voltage caps than specified up to a point, spare capacity.

Are electrolytic capacitors built in such a way that they perform better in one orientation than another?
I know Bang & Olufsen used large caps on their sides in the Beogram 4002 due to space limitations.
Thinking of doing the same thing to avoid bad contacts and for layout reasons.

PS Do you have a name for the type of switch used?
If you have the french name that would be a bonus.

[kt315]

So I read there could be an advantage to having higher voltage caps than specified up to a point, spare capacity.

higher voltage caps have less ESR but for DP this factor has not so big value. you have to check all your electrolytics on ESR doing a culling.
a tester recommended is here https://www.geotech1.com/forums/file...photoid=407530
look strong attention on place DISCHARGE RESISTOR - you have to discharge every lytic BEFORE to make the test.

[Carl-NC]

Are electrolytic capacitors built in such a way that they perform better in one orientation than another?

If you are talking about polarity, they only work one way. Don't plug them in backwards, they will possibly rupture.

[Infamy]

If you are talking about polarity, they only work one way. Don't plug them in backwards, they will possibly rupture.

No this is what I'm looking at.


B&O placed many of these large caps on their side and I never came across any problems.
But then they used high quality caps that are still performing 40 plus years on.

Stage 1 has come to a stop. Can't progress until the fuse issue is sorted.
Lipo 3S C10 5200mAh 11.1v battery fuse.
Could some one that knows about fuses just briefly layout some rules, as I know you can't just stick any old glass fuse in there if you are using lipo batteries.

[Infamy]

So I read there could be an advantage to having higher voltage caps than specified up to a point, spare capacity.

higher voltage caps have less ESR but for DP this factor has not so big value. you have to check all your electrolytics on ESR doing a culling.
a tester recommended is here https://www.geotech1.com/forums/file...photoid=407530
look strong attention on place DISCHARGE RESISTOR - you have to discharge every lytic BEFORE to make the test.

I think I have ESR covered. The white tester top left, I had two of those, they did not last long. Bought 4 yellows ones and I have not manage kill any of them, very robust & cheap.
The black gadget is accurate but only does ESR. The black tweezers look handy for SMD which I have not done before.

The switch, I think this is the french translation
Inter à bascule bipolaire off-on 3a 250vac 13x19mm
https://www.e44.com/composants/compo...-IB2T-NEW.html

[Infamy]

A few questions I have with these 2 images.

The difference in soldering technique, which is the best?
The missing components in image 2, is there a reason they are not there?
The reason for the braided wire across the potentiometers?

[kt315]

The switch, I think this is the french translation
Inter à bascule bipolaire off-on 3a 250vac 13x19mm
https://www.e44.com/composants/compo...-IB2T-NEW.html

take any switch you like. this is not issue. i took old things from trash electronics, all my project are based on trash electronics we call that TRASH TECHNOLOGY.
i took this switch from old power supply for personal computer, ATX.
this link trash technology - Geotech Forums (geotech1.com)

[kt315]

The difference in soldering technique, which is the best?

first pic a guy sets the pots in any place of face housing panel he wants. his pots 'pins back angle', not fitted the pcb directly.
second pic with braided wire is ESFI protection of the pots. pots are metallic and electrostatic goes from your hands you touch the shafts creating a noise in circuit.

The missing components in image 2, is there a reason they are not there?

no missing components. i do UNIVERSAL places for the pots and they are all DIFFERENT. people can set that they have in trash box.

[Carl-NC]

Caps: stand them up or lay them down, doesn't make a difference.
Pots: mounted to the PCB is cleaner and less likely to have EMI issues, but more limiting and difficult to layout. Mostly it's just preference. The braided strap is for grounding and is likely overkill.
Missing components: either they were optional for the design or the design supports another product that requires them. The TDI-SL has a lot of missing components that I put in for a future product that never happened.

[kt315]

Pots: mounted to the PCB is cleaner and less likely to have EMI issues

Pots were projected right on pcb because a customer must not be overloaded by questions what-wire-where-goes. the layout is very clear and clean for everybody.
you put a pot directly in the pcb and it is right. pakistani guy got working DP, without a knowledge in electronics, it is sure meaning everybody can do.

[algan]

Actually, there is another problem that I remember when I did Delta Pulse 15 years ago, it is the slow recovery. Please Carl tell me what the correction should be to have a fast recovery after the signal.

[Infamy]

take any switch you like. this is not issue. i took old things from trash electronics, all my project are based on trash electronics we call that TRASH TECHNOLOGY.
i took this switch from old power supply for personal computer, ATX.

I went through my parts boxes but did not find any switches that I liked the look of. Did not think to look at at the power switch on a old computer thats heading out the door.

On soldering you missed what I meant. Its the soldering top and bottom on components such as resistors.
Is it necessary to solder on top as well?
Are there benefits or even disadvantages to using more solder?

Fuses still waiting for comment on fuses. Try and understand what the purposes of this thread is, one is to ask all those questions that you over looked once you know electronics.
eg People think fuses just blow end of story but that's not the case is it, arcing can occur.

I forgot my LCR meters does ESR as well, that's going to be a fun piece.

[kt315]

Is it necessary to solder on top as well?

in my opinion not. take strong attention that the metalization is tin. i can not pay for 2 oz copper cause it will be two times above price. so the boards are 1 oz.
you have not to delete the copper resoldering components. if you will accidentally delete the copper nobody will help you.
metallization is in every hole but you do not see it, unvisible. a hole with deleted copper does not conduct a current from one side of the board to another and break up a circuit line, you get big trouble in repair, in troubleshooting.

clean every pin of resistors and capacitors by rubber eraser (kids use) before soldering.

[GeoMax]

Another very important thing when soldering resistors is that they must be oriented true north. That is that give you a good Karma.

[Infamy]

Another very important thing when soldering resistors is that they must be oriented true north. That is that give you a good Karma.

Never solder with dry hands on a smooth soldering iron. Better still cover it with a non stick coating to avoid burnt fingers.

Resistors can be soldered in any direction if you live at the North Pole.

Stage 1 finished still waiting on fuse info before move on. Salavged a power supply box with a fuse in it today. Some one soldered a wire between the two terminals; interesting subject.