If you’re looking for a smaller, better version of your old Raspberry Pi, the wait is over! The Raspberry Pi Foundation has just released the Model A+.
This single-board, ARM-based computer is ideal for makers of all varieties. At 65mm by 55mm, the A+ is smaller than its credit-card sized predecessors: Models A and B. It also requires less power, and with more GPIO (40 pins), the board is complaint with the HAT add-on boards.
The sound has been improved, too; The audio circuit on the A+ incorporates a dedicated low-noise power supply.
You can pick up a Raspberry Pi Model A+ for $20.00 online. Buy a few more, and the price drops even lower.