bill_of_materials.adoc

Bill of materials

This is a custom bill of materials derived from the original on Github. The list has been edited to use Swiss vendors whenever possible.

The quantity adheres to the number of pieces that are needed to build the JetBot and not how many need to ordered. As an example, 4 M3 screws are needed for the bot which are sold in packages of 100 pieces.

Be aware that depending on where you order from customs duties might be added on top of your order.

Vendor parts

Table 1. Common parts

Part	Quantity	Cost CHF	Vendor CH	Cost USD	Vendor Int	Notes
Jetson Nano	1	113.20	Distrelec	99.00	Arrow	Alternative CH vendor: Maker-Shop
Micro SD card	1	26.90	Digitec	11.99	Amazon	64GB
Power supply	1	25.00	Digitec	14.95	Adafruit	Micro USB, 5V, 2.5A; NVIDIA Power Supply Considerations
Motor	2	6.90	Play-zone	2.95	Adafruit	"TT" form factor
Motor driver	1	18.50	Distrelec	19.95	Adafruit
Caster ball	1	4.50	ZigoBot	6.30	BC Precision	1-inch diameter; Caster Ball Supplier in Europe
Battery	1	39.20	Digitec	14.88	Aliexpress	2x 5V/3A output, 10,000mAh; PowerBank Size
USB cable pack	1-2	2 x 9.00	Digitec	6.99	Amazon	Type A to Micro, right angle
PiOLED display	1	19.90	Play-zone	14.95	Adafruit
PiOLED header	1	1.50	Play-zone	5.95	Adafruit	2x(3+) right angle male

Table 2. Camera

Part	Quantity	Cost CHF	Vendor CH	Cost USD	Vendor Int	Notes
Camera	1	33.00	Digitec	23.90	Adafruit	Raspberry Pi Camera V2
Camera lens attachment	1	15.90	Pi Shop	12.45	AliExpress	160-degree FoV, 8 MP

Table 3. Wifi

Part	Quantity	Cost CHF	Vendor CH	Cost USD	Vendor Int	Notes
WiFi card	1	30.10	Digitec	24.89	Amazon	M2, Intel Wireless-AC 8265
WiFi antenna	2	10.30	Digitec	2.49	Arrow	U.FL connectors

Table 4. Wheels

Part	Quantity	Cost CHF	Vendor CH	Cost USD	Vendor Int	Notes
Wheel	2	3.40	Play-zone	2.50	Adafruit	60mm diameter

Table 5. Assembly Hardware

Part	Quantity	Cost CHF	Vendor CHF	Notes
Adhesive pads	2	5.20	Bauhaus
M2 screw	20	5.35	Bauhaus	8mm long, self tapping
M3 screw	4	4.65	Bauhaus	25mm long
M3 nut	4	1.75	Bauhaus
Jumper wires	4	11.30.-	Digitec	Female-female, ~20cm
Soldering Iron	1	30.20.-	Digitec
Solder	1	17.20-	Digitec

Shipping costs

The shipping costs of vendors that charge them can be found below.

Table 6. Shipping costs for each vendor

Vendor	Cost	Shipping time
Amazon	USD 65.95	13-26 days with Amazon Standard Shipping
Adafruit	USD 36.42	2-4 days with DHL Express Worldwide delivery.
AliExpress	USD 2.17	15-22 days with AliExpress Standard Shipping
Arrow	USD 50.99	2-4 days with DHL Express Worldwide delivery.
BC Precision	USD 23.50	8-14 days with US Postal Services.
Play-Zone	CHF 9.00	B-Post
Distrelec	CHF 8.00	B-Post
Zigobot	CHF 9.00	B-Post
Pi-Shop	CHF 6.90	B-Post

Total costs

Table 7. Order variants and total costs

Vendor variant	Total product costs (excluding assembly hardware)	Total shipping costs	Total overall costs	Description
All Swiss vendors	CHF 378.1	CHF 32.90	CHF 411.00	Swiss vendors selected if possible. Not all parts same as in example project which might cause problems. Easiest to order and cheapest. Fastest shipping. Small ecological footprint.
Example project vendors	USD 278.62	USD 153.36	USD 431.98	Same vendors selected as in the original project if possible. Least problems to be expected. Order very difficult and expensive. Longest shipping. Big ecological footprint.
Adafruit preferred	CHF 352.00	CHF 92.82	CHF 444.82	Swiss vendors except for products made by Adafruit and BC Precision. Few problems to be expected. Order manageable but around 33.- more expensive than cheapest variant. Ecological footprint justifiable.

3D printed parts

Table 8. 3D printed parts

Part	Quantity	Cost	Vendor	Notes
Chassis	1	n/a	FHNW Maker Studio	STL file for chassis
Camera Mount	1	n/a	FHNW Maker Studio	STL file for Camera mount
Caster base	1	n/a	FHNW Maker Studio	STL file for 60mm wheel
Caster shroud	1	n/a	FHNW Maker Studio	STL file for 60mm wheel

Additional information

• The Raspberry Pi camera has been picked because the hardware guide uses this as well. The assumption is that this will lead to fewer problems when installing the part.

• The M2 Wifi module has been picked because the hardware guide uses this as well. The assumption is that this will lead to fewer problems when installing the part.

• The 60mm wheels have been picked because JetBot was originally designed to use these. They are also better available from Swiss shops. However, it could be that the 65mm wheels perform a little bit better on uneven ground and obstacles. In case of any issues 65mm wheels can be ordered from Adafruit.

• Zigobot is the only Swiss vendor with a fitting caster ball. However, it cannot be recommended as the usability of the website is considerably below standards and the checkout process of the website is dubious.

• Originally a soldering iron sold by Bauhaus had been picked. This proved to be very unhandy and broke after a short while. There is another cheap model included in the bill of materials. However, a higher end soldering station is highly recommended for the best results.