H8-4 ATX power conversion (note to self)

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Les Bird

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Nov 22, 2022, 12:03:34 PM11/22/22
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To modify the H8-4 for ATX power make sure you strap the 7912 properly. I thought my card was bad but after thoroughly checking my regulator straps I realized I strapped the 7912 incorrectly. The result is not damaging, it basically applies GND to the output chips (instead of -12v) which results in console input working but nothing is output to the console.

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glenn.f...@gmail.com

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Nov 22, 2022, 9:24:32 PM11/22/22
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And at the risk of embarrassing you Les, your own notes on your site indicated this 😊:

 

https://sebhc.github.io/sebhc/pcbs/H8-2000_Construction.html

 

 

From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of Les Bird
Sent: Tuesday, November 22, 2022 12:04 PM
To: SEBHC <se...@googlegroups.com>
Subject: [sebhc] H8-4 ATX power conversion (note to self)

 

To modify the H8-4 for ATX power make sure you strap the 7912 properly. I thought my card was bad but after thoroughly checking my regulator straps I realized I strapped the 7912 incorrectly. The result is not damaging, it basically applies GND to the output chips (instead of -12v) which results in console input working but nothing is output to the console.

 

 

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