Archive for the ‘Inside Looks’ Category

Inside Look: AiAi Banana Catch

Friday, February 27th, 2009

Since I had a serious amount of fun pulling apart a Megajoy 2 previously, it seemed like a good idea to dismantle something else and the next item that came to hand was an AiAi Banana Catch LCD game; granted, thousands of children around the globe put some effort into opening one of these up when they were bundled with McDonalds Happy Meals (in some cases by throwing them at fixtures, fittings, members of staff and indeed other patrons of said fast food outlet) but they didn’t take pictures, did they?

AiAi Banana Catch - rear of case

AiAi Banana Catch - rear of case

Here’s the back of the case (with a second unit above it partially visible) and, along with the power switch and a tiny hole for the sound from the speaker (below the right arm of the golden arch) there are four screws holding everything together and a fifth that keeps the battery compartment cover in place.

AiAi Banana Catch - front of case removed

AiAi Banana Catch - front of case removed

Once those screws and then the front of the case have been removed, there isn’t actually that much to see! There’s the display itself, a single circuit board that drives everything (the rear of which is visible in the next picture), two pads for the left and right buttons and two wires running to the battery compartment at the bottom left.

The power switch is just a shaped piece of plastic which, when pushed into the “on” position, merely presses a piece of metal against a contact to complete the circuit. A simple mechanism yes, but robust enough that the unit can be abused by an eight year old stuffed full of chicken nuggets and chips and still work.

AiAi Banana Catch - front of case and innards removed

AiAi Banana Catch - front of case and innards removed

Finally, here’s the rear of the case again but this time with the works lifted forward to show their underside; the two yellow wires that were previously concealed by the board are there to connect it to the speaker.

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Inside Look: Megajoy 2

Friday, January 30th, 2009

I don’t know about anyone reading, but personally I can be incredibly nosey and it occurred to me the other day that I’ve absolutely no idea what is actually inside some of the tat I’m writing about. I don’t have much past a rudimentary understanding of electronics (more than enough to work on the average PC or service a Commodore 64) but that’s never stopped me from dismantling things before so, pausing only to grab a passing screwdriver and my (t)rusty digital camera, here’s what the innards of a Megajoy 2 look like! Y’know, it’s ideas like this that lead to occasional features for websites…

Step 1: the battery compartment is removed

Step 1: the battery compartment is removed

To start with, the battery compartment pops out of the base – literally since it’s spring-loaded! To actually dismember the thing, there are eight screws recessed into the plastic that need removing, five spread out over the three handles of the controller and a further three positioned around the housing for the battery box.

Step 2: the screws and lower case are removed

Step 2: the screws and lower case are removed

The screws are removed and the lower part of the case lifted away, leaving the upper and all of the innards in place. Taking a few fairly educated guesses, the larger of the two PCBs appears to drive the input and output whilst the smaller takes care of actually running the games; from what I’ve read previously one of those two blobs of black epoxy will be covering the NOAC itself and I assume that the ROM where the games are stashed is under the other.

Step 3: the board is removed and turned over

Step 3: the board is removed and turned over

Here’s the other side of the board that deals with I/O, there are four contacts on it for the D pad to the left, a single contact just below the red power LED in the middle and a further six to the right for the select, start and the two pairs of A and B buttons. At the back of the board on the left are a couple of composite video connectors and the DC input and power switch (without the yellow plastic cover which has been removed and is sat by the screws) are on the right.

Step 4: the board is moved aside to show contacts under the controls

Step 4: the board is moved aside to show contacts under the controls

And finally, here’s the board itself moved away from the shell so the underside of the D pad and buttons are fully visible; the two wires still attached are for the springs that press against the terminals on the battery compartment to provide power. And after all of this mauling, the Megajoy 2 went back together with reasonable ease as well, anyone would think that I actually knew what I was doing…!

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