As tempting as it might be, avoid using 0000 as your four-digit PIN code. Same goes for 1010, 1111, 1122, and 1212, which comprises the top five worst PIN codes, according to a list compiled by ...

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“How can I recover my iCloud Security Code? I entered the wrong iCloud security code a number of times for my iCloud Keychain, and now I’m locked out. It’s a 4-digit PIN, just like my ATM, and I ...

Let’s rollback the hobby electronics calendar a few decades with [myvideoisonutube’s] alarm activation control circuit using a matrix style phone keypad. The circuit is quite old using CMOS 4081 with ...