BoM.md

Bill of Materials

For this device you do not need an Arduino or equivalent microprocessor. Do make sure you have enough 3mm material to cut the design from and a bunch of M3 10mm and 30mm bolts and nuts for the assembly.

Must have

Quantity	Part	Link	Unit price	FIELD5
1	80 mm Fan	https://www.digikey.nl/nl/products/detail/mechatronics-fan-group/F8025M12B-FSR/5209759	� 10,02
1	metal plate circle, 0,5mm thick, diameter 90mm	https://www.combicraft.nl/toiletbordje-toiletten.html	� 2,99
1	Magnetic stirring rod
1	Permanent magnets
4	Rubber feet	https://www.conrad.nl/nl/p/toolcraft-2210sw12-c-apparaatvoet-zelfklevend-rond-zwart-x-h-22-3-mm-x-10-1-mm-12-stuk-s-1339867.html	� 4,99
1	Power switch
1	DC power jack	https://www.digikey.nl/nl/products/detail/kycon-inc/KLDPLX-0202-A/12627588	� 1,89
1	Heating foil 12V 22W	https://www.conrad.nl/nl/p/thermo-tech-polyester-verwarmingsfolie-zelfklevend-12-v-dc-12-v-ac-22-w-beschermingsklasse-ipx4-90-mm-1216623.html	� 20,99
1	7.5 W power supply (1000mA)		� 0,10
1	Potentiometer 100 ohm 2W	https://www.digikey.nl/nl/products/detail/bourns-inc/93R1A-R22-A05L/2564715	� 7,88
1	Potentiometer 100 Kohm 2W	https://www.digikey.nl/nl/products/detail/bourns-inc/PDB181-K420P-104B/3820299	� 1,00
1	PCB plate	https://eu.robotshop.com/products/4-6-fr1-copper-clad-single-sided-10pk
1	2.2uF Capacitor (C1)
1	100nF Capacitor (C2)
1	Schottky Diode 100V 1A (D3)
2	Zener Diode (D_Z1, D_Z2)	https://www.digikey.nl/nl/products/detail/yangzhou-yangjie-electronic-technology-co-ltd/BZT52C3V3/13911636
4	Screw_Terminal_01x02_P3.5mm
2	Screw_Terminal_01x03_P3.5mm
1	MOSFET_N-CH_30V_1.7A	https://www.digikey.nl/nl/products/detail/onsemi/NDS355AN/458899?s=N4IgTCBcDaIHYBMDOBmArGghnAxgFwFpEQBdAXyA
1	470
2	1k
1	100k
2	0
1	NE555D Timer (SMD)

Alternatives

• You could use all kind of motors, for example from a hard drive.
• Take a USB coffee mug heater apart for the heating foil or use a cheap power resistor to save money