the whatchamacalit

[coeng]

About 15 years ago when I was taking my digital design courses in college, I remember owning a really neat breadboard kit that included an integrated power supply among other things. It had a black hardcase that it sat in. It had a catchy name too. Any idea what its called? Its probably at in parents attic and I want to find it.

[shortbus]

Originally Posted by coeng

About 15 years ago when I was taking my digital design courses in college, I remember owning a really neat breadboard kit that included an integrated power supply among other things. It had a black hardcase that it sat in. It had a catchy name too. Any idea what its called? Its probably at in parents attic and I want to find it.

Hi, maybe you should look harder at Mom's!!!!$$$$$$

http://www.allelectronics.com/make-a...BOARD/-/1.html

[S_lannan]

usually they are called digital trainers.
Most have ttl and cmos power supplies, debounced switches, one shots and square wave oscillators..

hope that helps

[coeng]

Thanks to some detective work by my dad, we found it in his attic (as well as all my other material, tools, and components, and tons if ICs). I thought all my stuff had been thrown out. Good thing my parents are like pack rats.

Its called the A/D Trainer PAD-234A by R.S.R. Electronics. Below is the link...I think at the time I purchased it through my school. Now I just have to figure out how to use it. I plugged it in and it seemed to power on just fine. I'll have to test it out in the next few days. I hope that sitting untouched in a box in the extreme heat/cold for the past 14 years (since 1995!) didn't do any damage. I wonder about all the ICs I have as well. Only one way to find out. Only problem is that I have to basically re-learn everything about digital circuits....things like what does a J/K flip-flop do ?

http://elexp.com/tst_234.htm

[beenthere]

If the kit doesn't have a manual, be sure to get the data sheets for all the logic IC's.

One general rule - never leave an input open. If it's not being used, tie it to ground or to Vcc. TTL logic needs a resistor to Vcc. 74xx IC's need about 4.7K, later (74LSxx) need more like 20K.