Deadbug an SMD ATTiny85





Introduction: Deadbug an SMD ATTiny85

Steps to deadbug an SMD chip

Step 1: Prep the Wire.

Get the thinnest wire you can find and stretch it on a Helping Hand tool.
Tin that as best you can.

Step 2: Position the Chip

Okay, as you can see, I am past the first set of legs here. What I have done is line up the wire as horizontal as I could, then with another helping hand and a tweezer, I raised the chip up to the already tinned wire (parallel to it) until it is putting a BIT of pressure upwards (like a guitar bridge).

At that point, you slightly wet your soldering iron and touch the wire right about where the chip lead is.

Clip the wire inside of the leads.

Do the same on the other pairs of wires.

Step 3: Take a Break

Lather, Rinse, Repeat.

Phew! Almost there...

Step 4: Mount the Chip

This step is pretty much the same as before. give a slight tug on each wire to touch it to the legs of your header for tension (metal's nature will keep it in position). since they are already tinned from before, just touch them with the soldering iron to the corresponding header lead.

Step 5: Ready to Rock!

There are plenty of 'ibles and youtube videos and blogs on how to program an ATTiny, so I'll leave that step to you.

I'm working out a way to make this foolproof so that you don't have to bend the wire leads into position on the headers. That will be my next Instructable. HINT: think of a spider web, because my next one will be a full ATMEGA328.

In the meantime, here's a video of the deadbug ATTINY85 loaded with a standard blink sketch.

Step 6: Update: 2 Sep 2014

Oh DARN it! Someone (Raul on G+) beat me to it! I just found this article on hackaday:



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    13 Discussions


    If youve ever put together a model airplane, this is like putting the antenna wire on. Stretch, glue, trim. That's it.

    The idea came to me after watching video after video with a dude struggling to keep a single strand steady while at the same time soldering to a single leg. It just seemed so counterproductive! Much simpler and cleaner to just sacrifice the mm or 2 of wire between the legs.

    I still have to get some other chips to try, but I think even QFP could be done...

    3 years ago I made micro RC airplane(It was total nightmare :D) and I use pic micro controllers and they were small to use normal programmer and I thought that I can use this way to program them and yeah even QFP could be done :) . Last month I had to use one QFP motor driver and I did something like that to connect it to the main board.

    What, you made it DIY? I'd love to see it. Put it up as an 'ible or put it on YouTube.

    seems so easy.... once ytou think of it :-) ... and I never did.
    very instructive.
    I guess though this only necessary if you hapen to have an SMD. if still have to order I'd pick the regular DIL :-)

    1 reply

    True enough. Makes for a fun distraction and a way to test one's fine control. I am still looking at a couple examples for the ATMega328, DIL and SMD.

    Smart idea! I really like this project. Thanks for shearig :)

    1 reply

    Thanks! I still haven't gotten around to the 328, yet. Right now I'm struggling with understanding the mapping of pins on a LED matrix ATM. Kinda wish I had taken more pictures now when I was soldering it up.

    I tried the other method I saw, which was soldering individual wires to each lead. Comparitively, this is a piece of cake.

    It's a fun distraction...

    this method is such a pita, soic8 is about as small as you can probably go.

    1 reply

    Alternatively, to ensure the wires stick to the leads more securely, you can Flux then wet each individual lead with a small dab of solder on each lead, prior to attaching the wires. Check the bottom right leads in Step 2. There is a bead of solder on each one awaiting its wire.