IDBG - any suggestions ?

Werner Almesberger werner at openmoko.org
Thu Jul 15 19:34:51 EDT 2010


Ron K. Jeffries wrote:
> can you give a rough estimate of the cost
> of a bag of parts to make the IDBG?

Amount	Description		Vendor		P/N
1	MCU			Silabs		C8051F326
1	USB Micro-B receptacle	Hirose		ZX62M-B-5P(01)
3	Varistors 5.6 V		Panasonic	EZJP0V080GA
1	Resistor 1 kR 0402	Stackpole	RMCF 1/16S 1K 5% R
2	Resistors 0 R 0402	Stackpole	RMCF 1/16S 0 R
1	Cap 1 uF 6.3 V X5R 0402	Murata		GRM155R60J105ME19D
1	Cap 100 nF X5R0402	Murata		GRM155R61A104KA01D
~4 cm2	PCB 0.8 mm, single	Injectorall	PC55
~40 cm	Wire-wrap wire AWG 30	OK Industries	R30W-0100

You also need the various consumables (solder, flux, chemicals for
making the PCB, etc.), but they all have a negligible per unit cost.
I didn't include material for the boot loader download, because this
should come down to a few more bits of wire in the end.

Prices in USD from Digi-Key:

Amount	Digi-Key P/N			1x	10x	100x	1000x
1	336-1296-5-ND			  4.40	 44.00	304.62	2639.99
1	H11680CT-ND			  1.10	 11.00	 65.25	 232.00
3	P14130CT-ND			  0.63	  1.88	 47.34	 382.35
1	RMCF1/16S1KJRCT-ND		  0.02    0.17	  0.70     2.56
2	RMCF1/16S0RCT-ND		  0.04	  0.34	  1.40	   5.12
1	490-1319-1-ND			  0.37	  0.37	  2.21	   8.84
1	490-1318-1-ND			  0.13	  0.13	  0.78	   3.12
1/15	PC55-ND				  2.66	  2.66	 18.62	 162.96
1/75	K397-ND				 11.17	 11.17	 22.34	 156.38
					-------------------------------
Total					 21.06	 71.72	463.26	3593.32
					======	======	======	=======

Great saving are possible if you already have the wire or find someone
who can spare half a meter from a spool. Also, if making more than a
few pieces, you'll want to outsource the PCB-making (and get a better
price on the PCB material as an added benefit.)

- Werner




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