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Reply to "HC-SR04 ultrasonic sensor for outdoor layout block detection"

The off-shore parts were a bust!  I ended up getting them from Digikey for a bit more money.

The NE555 parts from AliExpress were all defective, I put four of them in a board and none worked.  So I fired up a simple test circuit on a project board and it turned out that only 9 or 10 of the 50 worked, obviously defective pulls.  I decided to pitch them all, not taking a chance.   I filed a dispute as well, I want my $3 back!   The 'HC123 parts worked, but as illustrated in previous posts, I failed to consider how much different they would be than the others I was using.  I decided to get get more of the Toshiba parts to keep the parts kit consistent. The caps from off-shore worked fine, I got the extra resistors locally as they're cheap anywhere.  I also rounded up enough regulators to equip them all, turns out I have a hundred from another build that were left over.

I also found some terminal strips that work in the board, so I'll have screw-terminals for the connections.  It ends up costing a bit more, but it's a much neater installation.

I think the final parts are in my mailbox, I'm going to go up and fetch them today.  I'll just have to kit up the parts and I'll be set...

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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