What do I need in a power supply for a MIDI project?

[Dave_B]

Just to clarify, I was suggesting you leave the IC in the socket while you're in the testing/development phase. 

[NeveSSL]

Oh, ok... just while it's on the breadboard?  Or what?  How would I do that?  Does it have anything to do with the "ICSP" header?  Thanks!

Brandon

[Dave_B]

Oh, ok... just while it's on the breadboard?  Or what?  How would I do that?  Does it have anything to do with the "ICSP" header?  Thanks!

Brandon

Well, I left the physical ICSP header out of it.  I didn't really need it since I wasn't technically doing ICSP.   I put the chip in the socket, then move that assembled unit from the programming breadboard to the actual circuit breadboard.  The machined pins on the socket are obviously stiffer and straighter than the pins on the chip, so it just makes the process a little easier.  When I get a chance, I'll post a picture of it in the next day or so.

[NeveSSL]

Oh, ok... that makes sense.  That's what I thought to begin with, but wasn't sure.  It's almost like having extra pins:  You put the PIC in the socket, and move that pic and the socket together, as a "unit" as you say.    I'm with ya now!  I think I only ordered one socket, though... but there's a RatShack across the street (literally... heh).  I'll probably just go over there and pick one up... I'll probably be getting my perf board there, anyway.    Thanks again!

Brandon

[DavidS]

Hey, any luck finding one of those LS7447 LED display driver chips? I'm having a hard time... Is there a known equivalent?

[Dave_B]

Hey, any luck finding one of those LS7447 LED display driver chips? I'm having a hard time... Is there a known equivalent?

Wow, I haven't thought about one of those in years.  Can you make a 744511 work?  They're both BCD-to-7-segment drivers, but I haven't checked the pinouts.  If it's critical that you have a 7447, I can take a look in "the box."  There's not much chance I have one, but you're welcome to it if I do. 

[Peter Snowberg]

PICs make great display drivers.

See the alarm clock example in the old microchip PIC app notes.

[DavidS]

Talked to Jim via email, looks like LS7447 was a typo, and it's actually a 74LS47. Mystery solved!

[Dave_B]

If this helps, here's what my programmer looks like:  http://www.davebales.com/me/pics/

Apologies in advance for the condition of the breadboards.  I'm a reasonably clean person... honest.