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Game of Life - mixing 1.2 and 1.3
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Game of Life - mixing 1.2 and 1.3

by dbetz on Thu May 20, 2010 6:19 pm

I built a Game of Life board a long time ago when the 1.2 kits were still current. Recently, I bought three more 1.3 kits and I notice that the power supply is different with the 1.3 boards. The instructions talk about adding a 7805 regulator to make the 1.3 kits compatible with the 1.2 kits but I'm wondering if the reverse can be done. Is there an easy way to remove the regulator from my 1.2 board so it can be powered in the same way as the new 1.3 boards? I kind of like the fact that there isn't a big regulator sticking out of the new boards.

dbetz
 
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Re: Game of Life - mixing 1.2 and 1.3

by dbetz on Sat May 22, 2010 6:22 am

Hmmm... I compared the schematics for the 1.2 and 1.3 boards and it looks like the power supply circuits are identical. At first I thought that meant that I could just remove the 7805 voltage regulator from the 1.2 board and power it the same as the 1.3 boards, from the 3v battery pack. However, then I noticed that the resistors on the 1.2 board are 250 ohms but the ones on the 1.3 board are only 100 ohms. Is this to compensate for running off of 3v instead of 5v? In any case, it seems to me that the LEDs on the old board will be dimmer than the ones on the new boards if I run all of them at 3v. Conversely, I would think that adding the voltage regulators to the new boards would make their LEDs brighter than the ones on the old board. It seems that maybe I need to order another 1.3 board to make a configuration that looks good.

dbetz
 
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Re: Game of Life - mixing 1.2 and 1.3

by adafruit on Mon May 24, 2010 10:17 pm

not sure about 'fixing' the v1.2 - we tested compatibility but only by putting in 7805's
resistors may differ. the LEDs may be slightly different too.

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Re: Game of Life - mixing 1.2 and 1.3

by dbetz on Mon May 24, 2010 10:40 pm

Thanks! I ended up ordering a fourth kit just to make sure they all worked together well. I like the new design better anyway!

dbetz
 
Posts: 34
Joined: Thu Jul 10, 2008 7:21 pm

Please be positive and constructive with your questions and comments.