Circuit Playground Proto Gizmo - Bolt-on Perma-Proto Shipping:4-6 Days And its contrast can be

And its contrast can be adjusted manually

This is the one color version - Red - but we also have a Red Yellow Green Alert Light in the store if you want more versatility

3 V will enable the regulator

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Circuit Playground Proto Gizmo - Bolt-on Perma-Proto Shipping:4-6 Days And its contrast can beExtend and expand your Circuit Playground projects with a bolt on Perma Proto that lets you connect solderable circuits in a sturdy and reliable fashion. This PCB looks just like a solderless breadboard but has permanently affixed M3 standoffs that act as mechanical and electrical connections. Solder to the gold plated traces to create your custom invention! Each pad of the Circuit Playground has a large oval pad you can connect to, and in the center