Thursday, October 29, 2009

Solder Bridge Found...

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A few days ago, I noticed that the LED for address line A4 on the expansion card was not illuminated. I removed the expansion card and conn...
Saturday, October 24, 2009

Clock Signal Fixed...

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Note the square wave on the scope... I finally have a clock input signal on pin 37 of the 6502 processor. I found that replacing the Philip...
Tuesday, October 20, 2009

2513 Character Generator

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This description of the 2513 Character Generator is from Don Lancaster's TV Typewriter Cookbook. The description explains clearly how t...
Monday, October 12, 2009

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On Sunday, Oct 11, 2009 I decided to put together an expansion card to plug into the Apple 1 motherboard. This card provides the ability to...
Friday, October 9, 2009

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I added the IN914 diode previously mentioned to protect the Apple 1 from unwanted external video surges, and I also added a "power on...
Thursday, October 8, 2009

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On October 6, 2009 I built this external circuit to bring the video, ground and +5v out to a separate PCB with an RCA jack. Eventually I...
Monday, October 5, 2009

Miscellaneous images while populating the PCB

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More power supply images...

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Above: prepping to solder the ON/OFF switch. Above - prepping to solder the female connector to the power supply lines. I don't know w...

Building the Power Supply

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Note that the 4 pin header looks a little rough, because it's actually a cut down version of the 6 pin header. If I took crapier pictur...
1 comment:
Thursday, September 24, 2009

oops...

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I just realized all four of the A14F are installed backwards... OK, so it took me about 2 hours to fix this major screwup. The A14Fs are ba...

LM323K Voltage Regulator Installation

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UPDATE: Feb.17.2010 - Please note that the A14F recitifier diodes are installed backwards in the above and below images. I fixed this soon ...
1 comment:

Soldering resistors and ceramic capicitors

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So today I got a package in the mail from Surplus Sales.... which contained all of the carbon composite resistors (EXCEPT for the (12) 3k o...
Tuesday, September 15, 2009

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Today a package arrived from Jameco.com, more parts for the Apple 1 clone! So tonite I soldered the 1N4001 diodes (4) and the (3) voltage r...
Saturday, September 12, 2009

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So today I finally took the plunge and started soldering IC sockets, diodes and axial capacitors onto my Apple 1 clone. I guess it took ab...
Monday, September 7, 2009

Interview with Monroe Postman, Original Apple 1 owner

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Monroe Postman Interview ======================= Sep.2009 Hello everyone, I am here speaking with Monroe Postman, one of the few owners of t...
Saturday, August 29, 2009

An Apple 1 will soon to be for sale...

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Please visit: http://apple1forsale.com Newsflash: This Apple 1, (number 49 sticker on back) SOLD on Oct 3rd, 2009 in the middle of the nigh...

Apple 1 ROM sets - 3 left

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Apple 1 ROMs for sale. I have 3 sets left. (1 set = A1, A2, A3, A4) I am dropping the price to $40 USD which was pretty much my cost. (In fa...
Tuesday, April 28, 2009

Apple 1 Interface Age October 1976

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Apple 1 ads first appeared in the October 1976 issue of Interface Age magazine. (Hmmm... or did the ad first appear as text only, in th...