Heartfelt 2. Inspirational 6. Religious 3. Romantic 1. Paper Wonder Signature 1. Tree of Life 1. Aladdin 1. Beauty and the Beast 1. Cinderella 1. DC Comics 1. Disney 9. Disney Princesses 4. Seuss 1. Elf 3. Frozen 2. Justice League 1. Maxine 1. Mickey Mouse 4. Minions 1. Minnie Mouse 1. Moana 1. National Lampoon's Christmas Vacation 2. Peanuts 9. Rudolph the Red-Nosed Reindeer 2. Snoopy 9. Making and transporting greeting cards has its own carbon footprint on the environment.
It is estimated that the average greeting card produces times the carbon dioxide as an email Verus Carbon Neutral.
Americans purchase enough greeting cards to produce the same amount of CO2 as 22, cars annually. Switch to E-Cards Sending your cards electronically is not only more economical and timely, but much more environmentally friendly.
Musical cards are a fun way to enhance the thoughtfulness or humor of a greeting card. Most feature a small device imbedded in the card, which plays music when the card is opened and is powered by a tiny battery.
Types of music can vary greatly, and may include birthday songs, Christmas tunes or other popular themes like those from the Star Wars films. Unlike the standard greeting card, expect musical cards to be three to four times more expensive, but they may be worth it in the smiles and happiness they can produce. Not all musical cards are expensive because some are e-cards. Unlike physical musical cards, many companies allow people to send e-cards at low to no cost.
I'd like to know how is the small black chip implemented? There is never any information or label written on it. Is the chip made using same technology as modern microprocessors CMOS technology, but with a very large nm process since size here is not an issue? I'm also puzzled by the fact there is no crystal oscillator or capacitor on the board, which might have been useful for generating the square waves for the speaker.
It was a spin off product from the extremely low power CMOS processes that they developed for the watch business. I'm sure that there are a number of companies that could make these and searches on "greeting card music chip" show lots of Shenzhen references. I'm sure now a days you could get them with bump bonds. The volume of these cards was high enough that it probably justified a custom chip.
The manufacturing process is called "chip on board", or often just COB. The bare silicon chip is mounted diretly to the circuit board, then a blob of epoxy put over it to protect it. In high volume this is cheaper than using a packaged chip. If this was a custom chip, it probably contains a ROM and a little sequencer to read the sound samples, then probably a PWM generator to make class D audio open loop.
Those are just guesses on my part, but would be the first approach I'd investigate if tasked to come up with something like this. Above all, it has to be cheap. Sound quality isn't much of a issue.
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