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- JustinM63 commented on Ashtam55's instructable Track-O: a Cost Efficient GPS Tracking Device Using NODE-RED & FREEBOARD
- JustinM63 commented on MrHermito's instructable How to Properly Clean Retro Game CartridgesView Instructable »
Fiberglass jewelers pen works great in place of a rubber eraser. That and a fresh 3v battery go a long way.
How much does this cost for the gsm service?