Electrical Engineering News and Products

Electronics Engineering Resources, Articles, Forums, Tear Down Videos and Technical Electronics How-To's

Teardown: Inside a video greeting card

By

For around $60, you can send a greeting card that incorporates a video. When the recipient opens the card, it can automatically

card disassembly
Top, what the card recipient sees. Next, removal of the outer card reveals what seems to be a piece of scrap paper holding the electronics in place, probably so it can go through an automated card attachment process. Next, removal of the scrap card reveals the masking tape mainly there to hold down the discrete wiring. Bottom, pulling apart the cavity reveals the foam edges, big globs of glue, and the placement of the switches and loudspeaker. Click image to enlarge.

play a video loop that you can upload. The card charges via a USB connection which also allows you to upload the video. Specs for cards we’ve seen typically mention a 2G memory, a five-inch color LCD having a 16:9 aspect ratio, and a rechargeable 1,500-mAh battery which is said to be good for a four-hour playing time.

We recently tore apart one of these cards to get an idea of how they go together. Our first discovery was the reason for the $60 price tag. If that seems a bit rich, it is because of what is apparently a lot of manual-assembly involved in the card. Removing the paper backing reveals circuit components glued to the card, probably by hand. Masking tape holds the wiring down so everything fits in the roughly 3/8-in-thick cavity holding the electronics.

The globs of glue all seem to be applied manually. Foam strips are glued around the edge of the cavity to give it a rectangular

card disassembled
A view of the card components splayed out for clarity. Click image to enlarge.

form. Interspersed with the foam edge panels are the volume control switches and the USB jack for battery recharging and video content upload. There’s also what appears to be a sensor that detects when the card is opened and probably serves as an automatic turn-on switch.

All the switches, the loudspeaker, the USB jack, and the battery use discrete wiring back to the PCB. Whereas the card itself seems to be hand-assembled, the PCB and the wire solder connections on it all seem to be done via automated methods. The PCB holds three main chips. One is a Hynix Semiconductor 256-Mb DDR SDRAM, the second is a Samsung flash memory chip, and the third is a processor labeled V100 from Actions Semiconductor Co. in China. There’s no description of the V100 processor on the Actions web site, but judging by other processors the company offers, it is probably based around some kind of ARM Cortex core.

And that’s about it for the video greeting card. Simple electronics, but credit the creators for envisioning how to squeeze the necessary components into a greeting-card format.