Partlist
	AddOn Board - Load Sensing
Common Parts - see Farnell Code
Number	Description	Part in Schematic	Farnell order code (2002)	Price each (estimate in £)	overall cost
1	Capacitors, 0.1uF	C1	354-9641	£0.10	£0.10
1	Capacitors, 10uF	C2	301-7230	£0.15	£0.15
1	36-way header, cut in 3,8,9 ways to make the PICK-STACK-CON	CON0	528-420	£0.60	£0.60
4	5 way 8A socket 3.81mm (solder in PCB)	CON1, CON2, CON3, CON4 - Loadcell	370-4750	£0.60	£2.40
4	5 way 8A plug 3.81mm (screw on load cell)	CON1, CON2, CON3, CON4 - Loadcell	370-5110	£1.70	£6.80
1	ADS8320   (16 Bit ADC, MSOP08)	IC1	300-6335	£9.00	£9.00
8	INA122PA, Inst Amplifier	IC2, IC3, IC5, IC6, IC7, IC8, IC9, IC10	101-862	£3.00	£24.00
4	IC Socket, Turned Pin contacts, 20 PIN	IC2, IC3, IC5, IC6, IC7, IC8, IC9, IC10, R1, R2, R3, R4, R5, R6, R7, R8, see photo	355-0734	£0.50	£2.00
1	DG508AJ, 8 single Multiplexer	IC4	353-9039	£1.50	£1.50
1	IC Socket DIP, 16 PIN	IC4	355-0710	£0.50	£0.50
2	Resistor 820R, 204/5	R1, R3, R5, R7	770-073	£0.05	£0.10
2	Resistor 100R, 204/5	R2, R4, R6, R8	477-722	£0.05	£0.10
Loadcells (e.g. from http://www.picotech.com/accessories/load_cells.html)
	Loadcells (select the appropriate type)
4	SE022 (1kg, used for the coffee table)			£50.00	£200.00
4	SE023  (100kg, used for the floor)			£100.00	£400.00
4	SE024 ( (50kg, used for the dinning table)			£200.00	£800.00
	A cheaper option is to strip an electronic kitchen or bathroom scale  - however you have to figure out the amplication factor you need…
PCB
1	load_add4.brd (double side prototype, no solder mask, no position print), size 70 by 60 mm	PCB	upload to http://www.pcb-pool.com/	£12.00	£12.00	(each, if you order 4 or more)
				overall estimate	£59.25	+ loadcells