Photodiode, an Uncommon card

The card carries these facts from its Wikipedia article.

• It produces an electrical current when it absorbs photons.
• This can be used for detection and measurement applications, or for the generation of electrical power in solar cells.
• Photodiodes are used in a wide range of applications throughout the electromagnetic spectrum from visible light photocells to gamma ray spectrometers.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Photodiode article was read about 56,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 69 and blocks with 66: each hit it takes is cut by 26 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Photodiode in the power ranking, all domains together.