DIY credit card reader with Teensy, we made this using a mag stripe reader and a Teensy – it automatically fills out our virtual terminal page for the shopping cart to take on site purchases.
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Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — The Not-So-Secret Code That Powers Robots Around the Globe
Wearables — Glitter big
Electronics — Turn the heat up! when unleaded
Biohacking — Google Sheets Based Life Tracking Dashboards
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