DWIZ-ADAPT

Power wheelchair board for REAL info!

POWERCHAIR MENU! www.wheelchairdriver.com/powerchair-stuff.htm

Re: DWIZ-ADAPT

Postby GlennGlenn » 21 Aug 2019, 22:14

Woody
:oops:
I thought the DWIZ-ADAPT circuit was doing the level shifting/inversion.
I have ordered the board you mentioned.
Thanks again
Glenn
GlennGlenn
 
Posts: 17
Joined: 13 Aug 2019, 23:10

Re: DWIZ-ADAPT

Postby woodygb » 21 Aug 2019, 22:25

It is shifting the weird Dynamic signal ...( which is a bit like TTL but at a much higher voltage ...hence the 9.2v zeners) ...to a RS232 signal.
An expert is a person who has made all the mistakes that can be made in a very narrow field.
Niels Bohr
User avatar
woodygb
 
Posts: 5786
Joined: 12 Mar 2011, 18:45
Location: Bedford UK

Re: DWIZ-ADAPT

Postby GlennGlenn » 22 Aug 2019, 20:19

Woody
Further to my question about the caps and theie orientation, I think that if a polarised capacitor is used for C1 its +ve must go to ground.
A negative voltage is taken from the Tx terminal (Rx) and stored in C1. The -ve is used for sending RS232 high from Rx rerminal (Tx).
This is a way of level matching the return -ve voltage to the received one irrespective of what shifting and combination is done by the rest of the adaptor before it goes to remote.
I think I should invert C1 before my RS3232 arrives, do you agree?
Glenn
GlennGlenn
 
Posts: 17
Joined: 13 Aug 2019, 23:10

Re: DWIZ-ADAPT

Postby woodygb » 22 Aug 2019, 22:23

Not a clue ...sorry.
An expert is a person who has made all the mistakes that can be made in a very narrow field.
Niels Bohr
User avatar
woodygb
 
Posts: 5786
Joined: 12 Mar 2011, 18:45
Location: Bedford UK

Re: DWIZ-ADAPT

Postby Irving » 22 Aug 2019, 22:34

GlennGlenn wrote:Woody
Further to my question about the caps and theie orientation, I think that if a polarised capacitor is used for C1 its +ve must go to ground.
A negative voltage is taken from the Tx terminal (Rx) and stored in C1. The -ve is used for sending RS232 high from Rx rerminal (Tx).
This is a way of level matching the return -ve voltage to the received one irrespective of what shifting and combination is done by the rest of the adaptor before it goes to remote.
I think I should invert C1 before my RS3232 arrives, do you agree?
Glenn

The ground end of c1 should be +ve. C1 and the diode create a TX driven charge pump to provide a -ve reference for the RX circuitry.
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
User avatar
Irving
 
Posts: 1744
Joined: 04 Dec 2012, 11:51
Location: NW London

Re: DWIZ-ADAPT

Postby GlennGlenn » 23 Aug 2019, 00:48

Irving
I came to the same conclusion after studying various circuits.
Thanks for the response.
Glenn :thumbup:
GlennGlenn
 
Posts: 17
Joined: 13 Aug 2019, 23:10

Re: DWIZ-ADAPT

Postby danpayton » 19 Sep 2019, 04:06

BTW - here's photos of my super janky setup! lol but it works!

still need to put it in a box, and insulate the connections a bit LOL

IMG_3535.JPG


IMG_3536 2.JPG


IMG_3537.JPG
danpayton
 
Posts: 26
Joined: 28 Jul 2017, 03:14

Re: DWIZ-ADAPT

Postby kaban » 10 Nov 2019, 20:12

Hi guys, am newbie here. Can anyone PM me a link to the Wiz5 software please?
kaban
 
Posts: 4
Joined: 10 Nov 2019, 20:06

Previous

Return to Everything Powerchair

Who is online

Users browsing this forum: CPguy, duke1, Google [Bot], hank, ICEUK, peterik and 17 guests

 

  eXTReMe Tracker