January 2020 STEAM Camp Kits BOM

Tablet

• Screen - 5" 800x480 - $32 [1]
• 7" screen - 1024x600 - $75 - [2]
• 7" screen - $70 - with cables and 5v 2A power supply - [3]
• 7" screen - Aliexpress - $38 - [4]
• Pi - $55 - Pi 4 with 4 GB RAM [5]. Comparison of 3 to 4 - [6]
• Pi camera - $9 for v1 [7] or '$25 for v2 [8] and [[9]]'
• Stabilizer bearings - skateboard bearings
• HDMI cable - $4 - [10]
• Wireless camera module - $20 - [11]
• You can get cheapo camera modules - [12]

Day 1 - Printer

• Printer - $278 - [13]
• Filament - hex key holder - people print them out for the next bunch
• Filament - razor holder
• Filament - small pliers with 8 mm shaft pivot.
• Filament - motor coupler

Day 2 - CNC Mill

• 555 motor - $5 Jameco - [14]
• motor coupler - $1.25 - [15]
• 1 mm milling drilling bit - [16] - $1.50

Day 3 - Electronics

• Atmel 328 DIP28 - [17] - $2
• Other components - see DIY Arduino. Crystal - $0.3 - [18],
• $2.11 - USB to serial converter - [19]
• Stripboard (NOT perfboard) - $1 - [20]
• Soldering iron - [21] - $4
• Soldring iron from 40W heater element?

Day 4 - Battery Pack + Welder

• [6] 18650 battery pack - 24v nominal - $4 ea - [22]
• Rectifier -
• Transistor - 2 at $2 each - $4 -
• Heatsink - 2 at $2 each - $4 - [23]
• 1/4" set screws -
• 4 ga wire -

Spreadsheet

https://docs.google.com/spreadsheets/d/1OOqqDsvEP2sL7xdTfUrtBirDCjk6aEAbBwyjZDt_-lk/edit#gid=1571230577