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Circuit Basics video series

channelmaniac

channelmaniac

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Posted a 2nd video in the series of Circuit Basics tonight on YouTube. This one on Clock Circuits and it covers an overview, sample circuits, clock dividers, and troubleshooting.

It’s based on the series of posts I have on the Aussie Arcade forum to help folks understand the circuits in their old school computers and arcade games.

These are not design sessions - they are there to help folks understand what they are, why they are required, how they work (at a high level), and how to troubleshoot them. Collectors should understand what they have and how it works. That’s what the target audience is.

The first was Reset Circuits. This one is Clock Circuits. The next one will be on Interrupts (/IRQ and /NMI)

I hope you find them helpful, but please don't tell me they suck, though. Tell me WHY you think they sucked so I can improve the next video. :)

Raymond
 
I’m so glad you’re creating these! I’ve watched both videos so far and scanning through the Aussie forum list I’m looking forward to the ones coming up (assuming you’re doing videos for all those topics). I’ve had luck repairing all kids of things if a board boots, but when they’re dead they seem to stay dead on me. I hope these help round out my knowledge so I can at least get to certainty like “dead custom” having ruled out the rest.

If you ever record yourself troubleshooting a pcb from scratch, I’d totally watch that too. Would be nice to see the checklist you work through on a totally dead board… eg Physical Damage, program code, proper voltage, then Reset, then clock, then enablement lines, etc in whatever order you find is best.

Thanks for the work you’re putting into this, and the knowledge you’re sharing!
 
One circuit on youtube did excellent videos and explained things really well in layman's terms.

View: https://youtu.be/NZzSklQY1yY


Your videos are more in depth at specific areas of the circuit which is also useful. Will look forward to Interrupts (especially if it talks about how different CPU's like Z80, 6502, 68000 etc uses them, and how different parts of the system uses it to talk to the CPU, and what issues they can cause in a circuit/arcade pcb, how to diagnose faults in the interrupts circuits)

I also find that rather than read repair logs where people just say fault x = replace y, its so much more useful when they explain how the system works as many faults are usually never the same. It's great to have a good general knowledge as it allows me to apply it to anything.
 
@Monstermug thanks for that link! his addressing section of the cpu video really clicked for me.
 
I have to head to Staples today to buy another box to ship your board back since you didn't like the free one that exceeded dimensional shipping rates. Your original box arrived way to damaged to reuse and was disposed of.
 
channelmaniac said:
I do....
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Yay! I'm glad to hear from you :)

"since you didn't like the free one that exceeded dimensional shipping rates."

Maybe this was the snag. I never turned down any box- so I'm guessing that was somebody else. I've been trying to not be too much of a squeaky wheel since I know you've been busy but I've been tying up any loose projects that have been started more than a year ago and get as many earnable machines back up as I can.

Thank you very much for reaching out. What's the best way to reach you//pay you up? I look forward to crossing this one off the list!

Thanks again!
 
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