richard LER
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Description
Signal Injector Pen In A Pen!
You will find build instructions on my Youtube channel
Learn Electronics Repair
Jan 12,2026
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Signal Injector Pen In A Pen!
Build a rechargeable battery powered signal injector pen that actually fits in a pen
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Published: Jan 12,2026
Standard PCB
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Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen（Without Speaker）
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