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. 2025 Apr 24;22:e00652. doi: 10.1016/j.ohx.2025.e00652

Table 4.

Bill of electronic materials.

Description Number Cost per unit(¥) Total cost(¥) Source of materials
Arduino MEGA 2560 1 295 295 https://www.taobao.com
MEGAV2 Expansion Board Veneer 1 63 63 https://www.taobao.com
L298N 2 6.8 13.6 https://www.taobao.com
Metal Pushbutton Switches 1 14.5 14.5 https://www.taobao.com
NRF24L01 2 5.5 11 https://www.taobao.com
Arduino pro mini 1 46.88 46.88 https://www.taobao.com
Toggle switch 1 0.12 0.12 https://www.taobao.com
3-pin, 2-position, single-connected pushbutton switch 2 8.92 17.84 https://www.taobao.com
Button 1 23 23 https://www.taobao.com
PS2 rocker 2 3.35 6.7 https://www.taobao.com
18,650 batteries 2 18.8 37.6 https://www.taobao.com
2 Series 18,650 Battery Pack 1 2.8 2.8 https://www.taobao.com
Skateboard wheels 4 7.9 31.6 https://www.taobao.com
MG996 4 13.5 54 https://www.taobao.com
SG90 1 10.6 10.6 https://www.taobao.com
Motor 4 262.4 1049.6 https://www.taobao.com
12VBattery 6000 mAh 1 78 78 https://www.taobao.com
AMS1117-3.3 Step-Down chip 1 0.41 0.41 https://www.taobao.com
Total 1756.25