No-connector AVR programming

Posted on Friday, December 13th, 2013 in AVR, how-to by DP


Steve writes:

Here’s a handy trick I developed while searching for ways to reduce the cost and assembly time of Floppy Emu boards. The board has space for a 3 x 2 shrouded IDC header, where the AVR ISP cable should connect. But that connection is only needed once, the first time the AVR is programmed – all future software updates are loaded from the SD card using the bootloader. So why waste 75 cents and 30 seconds of soldering on a part that’s only ever going to be used once? It’s a small saving, I admit, but those savings add up.

This entry was posted on Friday, December 13th, 2013 at 11:00 am and is filed under AVR, how-to. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

4 Responses to “No-connector AVR programming”

  1. John M says:

    “A handy trick you developed”? Surely you must be kidding, right? Not populating the ICSP connector on a target board is something that I and many others have done for years! This is really a very common technique! Anyway, thanks for the chuckle, and keep “developing”!!!

  2. Taniwha says:

    I like the tag-connect connectors for the same reason and the no-legs pad layout is tiny compared to a normal .1 inch header

  3. Dick Cappels says:

    Lots of things are invented multiple times. The fact that this has been done in the past does not diminish Steve’s creativity and development. Disparaging comments are hardly conducive to others to share their developments.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...
  • Max: I have a suspicion the hefty electrolytic cap might be some sort of cargo cult carry-over from other RF-based projects - for instance, I've seen...