The Repeater – CP-33 Repeat Card Player

IMG_0042

I found this thing in the Akihabara Hardoff store. I had no idea what is was but figured for 540Yen (~5USD) it was worth a look. From the limited information I’ve been able to find it appears to be part of a card based learning system. The user swipes creditcard like cards through the device, which reads the magstrip and plays back an audio recording. As far as I can tell the device is used for flashcards. Perhaps a Japanese word might be written on the card and the user would have to guess the English. They can then place the card in the device to hear the audio.

The player pulls the card through the read system at a constant speed. It then reads the card and samples the audio, as the name suggests it can repeatedly replay the audio track.

I though this was an interesting analogue storage/digital playback device designed right at the cusp of our transition from analogue to digital media. I’d guess this particular player was built in the early 90s, though I couldn’t see a data code. It’s also interesting the it uses a TI part (TMS3477NL) this appears to have been specifically design for audio recording and playback.

IMG_0043

Motorboard – Easydriver/Arduino/PKE243DA interface r1

motorboard

I picked up 50 PKE243DA Oriental motor steppers cheaply on eBay. They came with cables terminated using a funky Molex connector, fortunately Farnell have a knockoff socket for these for about 1USD each (still expensive but I can tolerate that). This board holds an Easydriver (which are crazy cheap on eBay) and interfaces to the Arduino/terminates to the PKE243DA molex connector. Gerbers and Kicad files below!

motorboard.tar

Atari Punk Console rev3

ataripunkr3

UPDATE: You can now buy this on my shop.

I’ve sent a 3rd revision of the Atari Punk Console design out to fab, as shown above. The new version incorporates a bunch of changes based on my experience with my first soldering workshop, including making the pads a bit bigger, increasing text size, removing redundant designators etc. Here’s the video on the workshop experiences, the Kicad files and Gerbers are linked below.

AtariPunkConsole.tar

Arduino 8 Channel ADC Board r3

ADCr3

As discussed in the video from yesterday, this version of the LTC1859 board splits out digital and analogue ground planes. Gerbers and Kicad files below:

LTC1859.tar