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D2-8 Intelligent Tracking Line Smart Car DIY Kits, Fun STEM Kits for School Students Electronic Soldering Learning Practice Kits 1.Description:    It is a D2-8 Intelligent Tracking Line Smart Car Soldering Electronic Parts Practice Soldering Learning Electronics Kit. Please note: Batteries appeared in picture are not included. PCB color was differe... $5.99
$9.99 Add to Cart SKU: GY21073-1
$5.99
$9.99
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DIY Negative Feedback Amplifier Circuit Kit with Capacitor-Coupled Analogue Electronic Technology Training Parts 1.Description:   1>.The negative feedback amplification circuit kit has good stability, which can effectively suppress distortion and noise, and improve sound quality.   2>.The RC coupled analog electronic technology ... $2.03
$3.39 Add to Cart SKU: GY20989-1
$2.03
$3.39
Add to Cart 41