H8 Z80 CPU V4 Serial Cable Connector

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pbi...@gmail.com

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Nov 21, 2021, 7:41:12 AM11/21/21
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All;

What are people using to make up the appropriate female cable-end 15x1 connector and its fittings?

Cost-effectively, of course :->.

 

The one that I see in Glenn’s photo is marked 134-1022, FYI.  I haven’t been able to reverse-engineer that into anything :-<.

 

Thank you,

paul

 

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Glenn Roberts

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Nov 21, 2021, 9:20:48 PM11/21/21
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I seem to have four original Heath serial connector cables for use with the H-8-4.  I believe these are WH8-41 wired per the spec’s in the following:

 

https://sebhc.github.io/sebhc/documentation/software/docs/AdapterCables_597-1836-01.pdf

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Norberto Collado

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Nov 21, 2021, 10:00:59 PM11/21/21
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I created my own cable to connect from 15x1 to DB9. I can provide the connections from DB9 to DB25 if needed. Using DB9 allows me to use the USB to DB9 adapter cable to use it with my laptop.

 

P603/P604 on Z80 V4 CPU board:

 

P603/P604 to DB9 connector

Pin 1 – GND – not used.

Pin 3 – TX_Data to pin 3 on DB9 (red cable)

Pin 5 – RX_Data to pin 2 on DB9 (green cable)

Pin 7 – RTS to pin 7 on DB9 (blue cable)

Pin 9 – CTS to pin 8 on DB9 (yellow cable)

Pin 11 – DSR to pin 6 on DB9 (violet cable)

Pin 13 – GND to pin 5 on DB9 (Brown cable)

Pin 14 – DTR to pin 4 on DB9 (White cable)

Pin 15 – RLSD to pin 1 on DB9 (Orange cable)

There is a gray cable left, so I connected it to DB9 pin 9 (RI) if needed in the near future. The other end not connected to the 15x1 header.

 

I bought the following cable from Jameco (25ft for $11.95 + shipping) https://www.jameco.com/z/SC9-25-Jameco-Valuepro-Multi-Conductor-Cable-9-Conductor-Stranded-24-AWG-Shielded-25-Feet_644412.html

 

Thanks,

Norberto

 

From: "se...@googlegroups.com" <se...@googlegroups.com> on behalf of <pbi...@gmail.com>
Reply-To: "se...@googlegroups.com" <se...@googlegroups.com>
Date: Sunday, November 21, 2021 at 4:41 AM
To: "se...@googlegroups.com" <se...@googlegroups.com>
Subject: [sebhc] H8 Z80 CPU V4 Serial Cable Connector

 

All;

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pbi...@gmail.com

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Nov 22, 2021, 3:11:04 AM11/22/21
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Thank you and Glenn both for the additional information.  So the printed PN is from Heathkit; aha!

 

I’m thinking that the “subtext” response is that since this is 0.1” pin-spacing “just use one side of any IDC-style 15x2 connector”?

Glenn Roberts

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Nov 22, 2021, 5:21:07 AM11/22/21
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Double check against the Heath wiring but I believe that’s correct. Back in the 80’s I built my printer and modem cables using IDC-style DB-25 connectors from Radio Shack.

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On Nov 22, 2021, at 3:11 AM, pbi...@gmail.com wrote:



Norby

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Nov 22, 2021, 3:53:37 PM11/22/21
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You can still buy the 15x1 connector. Do you need such information?

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On Nov 22, 2021, at 12:11 AM, pbi...@gmail.com wrote:



norberto.collado koyado.com

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Nov 23, 2021, 7:56:32 PM11/23/21
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15 pin Molex KK is here:
15 Pin Circuit .100″ (2.54mm) Molex  KK Series Monitor Connector Housing With Friction Ramp Female Receptacle Socket 15 position 1 (single) row (CB1009).

Also, you can buy the 25-pin connector to use on the H8 Front Panel.
 
25 Pin Circuit .100″ (2.54mm) Molex KK Series Monitor Connector Housing With Friction Ramp Female Receptacle Socket 25 position 1 (single) row (CB1007). Some of our stock has ramp and ribs and others only ramp so if you don't need ribs you can easily cut the ribs off. Pins sold separately.

Pins here:
Molex KK Series .100 Crimp Pins Female 22-30 AWG (Loose pin 100 pack) (CB1000). Best quality arcade pins and they fit ALL of our .100 connector housings.
Norberto

pbi...@gmail.com

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Nov 24, 2021, 12:51:43 PM11/24/21
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Thank you Norberto.  So Molex KK-series, the missing clue.  Seem to be much more cost-effective at Mouser:

 

https://www.mouser.com/ProductDetail/Molex/22-01-2151?qs=U%252BuvySh%252BEcnuR7S0EURgzw%3D%3D  $0.61

https://www.mouser.com/ProductDetail/Molex/08-50-0106?qs=zi95yC3thwEn8WhcIJBXDA%3D%3D $6.70 per 100+

 

I see that Pololu is running a sale until Monday: https://www.pololu.com/blackfriday2021

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norberto.collado koyado.com

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Nov 24, 2021, 12:58:56 PM11/24/21
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Great and thank you for the KK link to Mouser.

Pololu is now expensive, so it is cheaper to use the 7805 regulators again.

Norberto

From: se...@googlegroups.com <se...@googlegroups.com> on behalf of pbi...@gmail.com <pbi...@gmail.com>
Sent: Wednesday, November 24, 2021 9:51 AM
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Subject: RE: [sebhc] 15/25 pin KK series connectors supplier.
 

Steven Feinsmith

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Nov 24, 2021, 1:32:52 PM11/24/21
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Yes, Pololu tends to charge more expensively lately regardless if they provided black Friday was not reasonable. It seems that we have to design our switching voltage regulator similar to Pololu. The 7805 is limited to 1 to 3A version and is no longer found in the 5A range in the market.

Steven



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norberto.collado koyado.com

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Nov 24, 2021, 3:08:09 PM11/24/21
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Perhaps we could add to the board the following circuit as default. All through hole components.

 

From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Steven Feinsmith <steven.f...@gmail.com>
Sent: Wednesday, November 24, 2021 10:32 AM
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Subject: Re: [sebhc] 15/25 pin KK series connectors supplier.
 

Steven Feinsmith

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Nov 24, 2021, 3:14:42 PM11/24/21
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Yes, it will be good to start to avoid Pololu. In case if we need more than 3A then, it can drive with MOSFET.

Steven

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rand...@hotmail.com

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Nov 24, 2021, 4:45:41 PM11/24/21
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My go to:


Randy

norberto.collado koyado.com

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Nov 24, 2021, 7:25:05 PM11/24/21
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I was thinking more in-line with "new" full size boards to have the circuit below already integrated depending on cost.

Thanks for the link to ezsbc.

Norby

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Steven Feinsmith

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Nov 24, 2021, 8:24:19 PM11/24/21
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Hi,

Here is an excellent databook from Texas Instruments as follows:


Happy Thanksgiving!
Steven

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Glenn Roberts

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Nov 24, 2021, 9:06:36 PM11/24/21
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So one very nice feature of the Pololu model that some others don’t have is the step up/down feature.  For example, the EZSBC one requires at least 7.2 V input, so it’s a step-down only.  With the Pololus I can swap boards at will between systems that have the linear H8 supply (8V) and those that use PC ATX supplies (5V).

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