A relaxing breather with old tech...

xanatos

Sometimes, it's a fun reminder of my early years in electronics when I have need for an old friend, the 555. After my recent project efforts, making an adjustable low-triggered, one-shot timer has been a nice breather. So I made 15 of them...heck, they're handy little things. Felt like summer evenings when I was a teenager while I made these :-)

These are being used as alarm silencers. If the crew hasn't cleared the alarm condition in around 5 minutes... the alarm starts sounding again. These interrupt the alarm signals. Great fun.

erco

Yup, love the 555/556. Very handy and fun to use. The designer of the 555 chip Hans Camerzind passed away last year.

I use the 556 for my IR tracking beacons, info & schematic at http://www.botmag.com/index.php/picaxe-part-4

Beau Schwabe

Don't forget the rare 558 ... Quad 555..... popular in joystick cards.

phatallica

When I started my quad sequential timer, I really wanted to use 558. Alas, I had to settle for a couple of 556s. The third IC is ULN2803 for output buffering.

erco

All this 555 chatter makes me wanna bust out my well-worn Forest Mims book, "Engineer's Notebook II" from Radio Shack circa 1982...

xanatos

Forest Mims was my idol! I absorbed those books. I still have my Engineer's Notebook, albeit copied and put into a three ring binder to immortalize it before it disintegrated! And I still refer to it! Good memories.

erco

Don't forget to bust out your Micronta Range Doubler analog multimeter. We all had 'em! Still have mine.

http://www.ebay.com/itm/VINTAGE-MICRONTA-22-204U-43-RANGE-DOUBLER-MULTIMETER-Tester-Complete-Radio-Shack-/190874788126?pt=LH_DefaultDomain_0&hash=item2c7106211e

Heater.

Bah, we used to have these meters: http://www.flickr.com/photos/russell_w_b/8044233246/

Publison

Ok,

I have Papa Bear and Baby Bear, but it seems I'm missing Mom Bear.