Subject:
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IR port
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 11 Nov 2001 12:59:20 GMT
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Reply-To:
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CHRISB@GANZFIX.stopspamDE
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Viewed:
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2199 times
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Hi $ALL!
I just assembled a handyboard. The assembly documentation (hba.pdf)
says, that there should be a ~40kHz square wave at pin 2 of U9
(HC04). My frequency counter shows 72 kHz... So I took a new
capacitor (682) and a new resistor (3k83) but that makes no
difference. Any hints how that comes?
THX
Chris
--
Chris Benndorf
chrisb@ganzfix.de
http://www.ganzfix.de
Phone: +49 6356 989333
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Message has 1 Reply:
 | | Re: IR port
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| see the v1.21 parts list in the hardware section, for the following info: re: R4's value. Depending on the variety of the manufacture of the HC132 chip, R4 should be either 3.83K (Digikey 3.83KXBK-ND) or 6.81K (Digikey 6.81KXBK-ND). To test this, (...) (23 years ago, 11-Nov-01, to lugnet.robotics.handyboard)
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