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Old Feb 21, 2008, 11:53 AM   #1
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**UPDATE edited on 6/30/2005** This is the older post of the mic mod. We have achived better results with the detachable G.E. notebook mic.

You can get the latest info here

http://forums.steves-digicams.com/fo...mp;forum_id=92

***end of Update****************

Thanks to everyone on the Forums, and especially Fishy and Dbrower

Here is my version of adding on a mic jack inspired by the thread

http://forums.steves-digicams.com/fo...mp;forum_id=92

Any one (all the MacGyver types) attempting to do this, remember

This will definately void your warranty.

1)DO NOT to pull out the white connector as seen in the pictures of the other discussion thread above, (just move the board and case around, swing it around, etc and you can get acess to the internal mic capsule.
2) The neg/Grd terminal is labled incorrectly in the pictures (see the forum discussion above), the neg/Grd terminal is closer to the lens.

Here's fishy' taking the Aiptek apart

http://www.youtube.com/watch?v=EgpjQTvpM74

**edited ** and here is forum topic to a link of a more detailed disassembly of the Aiptek

http://forums.steves-digicams.com/fo...mp;forum_id=92

and a link to a 30 minute video taking apart the aiptek
http://forums.steves-digicams.com/fo...mp;forum_id=92

parts:
Radioshack 1/8" Stereo Panel-Mount Audio Jack # 274-249 or #274-246
misc thin wires

Tools,
small diameter drill bit
wire snip
** Solder iron** with experience in soldering tiny wires without buring it up or burning a circut board ***
hot glue gun
very small screw drivers, to take apart the device
Continuity check device or OHM meter, to check solder joint

Here are is test of the mic jack with different powered low powered (single battery) cheap mics Sima MZM-1 and a comparison test of the internal mic (substuted with a marginally better radio shack mic capsule) with old 1.6 firmware

http://www.vimeo.com/714000

** edit (may 2008, Vimeo video withnewly added with a smaller mic GE brand detachable laptop mic and revised Firmware 2.002 ***

http://www.vimeo.com/994164

More: continued


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Old Feb 21, 2008, 11:55 AM   #2
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I put marks to where to drill into the mic cover
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Old Feb 21, 2008, 11:56 AM   #3
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Here is from the package of the 1/8 plug pc board mount from radio shack
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Old Feb 21, 2008, 12:09 PM   #4
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After drilling and test dry fitting the jack mount on to the mic cover.

I then soldered three small wires to the terminals, and thread each of the three the wires trough the holes past mic cover. I had to widen some of the holes since the solder joint made a bigger blob footprint which had to sit evenly on the cover. (The front opening of the jack is very close to the mic cover almost laying on the mic cover)


To get ready to opening the A-HD, I then Took a picture with the flash to discharge the flash capcitor, and immediately took out the battery so it did not have enough time to recharge the flash capcitor.

Then I took apart the Aiptek A-HD


CAREFUL: I did not take apart the ribbion connector, but I merely shifted the board and the casing around so that I could get to the back.


Careful: I had some trouble shifting out the Blue plastic bezel around to free the board.


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Old Feb 21, 2008, 12:29 PM   #5
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Double check the neg/GRD trminal location is at the wire lead from the mic which is closest to the lens. Away to double check is that the mic capsule wire which is the neg/GRD is that the wire will also a have wire connections (like a spider web) out to the outer metal casing. The single wire going into the casing is the positive.


I decided to wire the jack so that it is MONO only, since the internal mic is MONO only. Also, if the middle Barrel (the other stereo channel) is wired together with the tip, then I would not be able to use a MONO jack since a MONO jack's barrel section would connect to the JACKs ground and would provide a short circut between the ground and the tip. Then I would have no sound from a MONO microphone. This way I would be able to use a MONO micOR alternately, I coulduse a SINGLE channel from a stereo mic.

Now the POINT OF NO RETURN. Involves cutting of wires and soldering DELICATE PC terminals.

***In fact, if you had trouble soldering the wires to the 1/8 mic jack terminals in the steps before, you may not be not adept enough at soldering to attempt to do this entire modification without damaging the Aiptek***

** CRITIAL the pos (+) and neg (-) on the pc board are very close together -- have some desolder tool or desolder braid to mop up any solder. also CHECK to see if ther is no shorting between the pos or neg with a continuity check or OHM meter, otherwise there will be no signal from the any mic**

Snip the wire to the postive terminal and move the wire from the mic capsule away from the pc board. I bent it away from the board and bent the top of the mic was slightly slanting towards the lens.

Solder the the wires the NEG/GRD wire from the MIC JACK to the NEG/GRD (Black in the diagram)

solder the wire (pos +) mic capsule mic to the wire from the switched MIC jack tip terminal (yellow) and
Solder the other wire to the PC board to the unswitched MIC jack terminal tip (Red).

Take care to make sure that the red and yellow wire and the wire leads from the mic and the pc board are not touching each other and CAUSING A SHORT CIRCUIT. I put some liquid paint wire insulator stuff I had laying around to protect the circuit.

** edit ** see further down for another post with a picture with a more detailed description of the wire connections between the Mic/ pc board/ and the 1/8"jack
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Old Feb 21, 2008, 12:31 PM   #6
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***edited***
Remember: There are two types of External mics: 1)condensor electrect based microphone/ mic capsules will work. 2)A microphone with a magnetic pickup would not work well (too low of an output, not enough sensitivty in an unpowered system) since those types the mic signal is meant to be amplifed by a larger amplified system.
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Old Feb 21, 2008, 12:36 PM   #7
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Now carefully put it back together. I had a connectiion get loose when I closed the case up and had to push the internal mic slightly to get the case to close. Once I resolder the connection, it worked fine.

Careful: remember that the case is plastic, so don't over tighten the metal screws otherwise you may strip the threads in the plastic.


By the way, since I had the thing apart, I put in a new slightly larger mic capsule from radio shack. Slight different, Dont really know if that was worth the effort for that change.

The INTERNAL mic will work default and when plugged in, the new mic will be the source and the internal mic will be disconnected. you may be able to hear me pluggin and unplugging the test mics in the video.


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Old Feb 21, 2008, 12:37 PM   #8
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Here is a close up of the jack with a SIMA MZM-1 attached. The front of the jack is very close to the surface of the mic cover so any 1/8 male jack that has a big wide diameter (like a converter jack) would not fit. I hot glued the jack onto the mic cover. I could have raised the mic jack by rasing up the jack above he mic cover surface (as opposed to having it sit on the mic cover) and filling it the space with more hot glue beween the cover surface and the bottom of the jack. But I wanted a more cleaner and smaller profile of the mic jack on the cover.
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Old Feb 21, 2008, 12:48 PM   #9
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And heres a link to another person who wired a mic jack and a changable lens. Here you can find a link of a comparison of a before and after video, by choosing the video response

http://www.youtube.com/watch?v=ewrmIW-EP_4

http://www.youtube.com/watch?v=zpPMHx-sjCw


I found dbrowder's original test
http://video.aol.com/video-detail/a-...est/3167758695

And a misc picture of the Mic Jack
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Old Feb 21, 2008, 10:02 PM   #10
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Okay, so I am getting 99.9% of your project here and I am almost ready to start taking apart my camera just for this. But before I do, I need to understand this a bit more. It's great to see a really simple way to modify my A-HD without having all the bulgy stuff like that 9V battery and stuff. But that's not the point of this post.

I was just wondering, is there a better way that you can show what wires connect to what? That's all, because I am having a little trouble figuring

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