Close

Breaking Down the BOM, Costs per Board

A project log for VGAtonic

CPLD-flavored VGA Video card

PKPK 08/16/2014 at 16:450 Comments

Let's talk about costs - because when you buy parts in the quantities I am, it's hard to determine exactly what the cost per board is (although we can try).

Part Name #/Board Cost/Part Cost/Board Quantity Purchased Where? Part Number
ATTiny 2313a 1 1.11 1.11 10 Newark 68T3554
Bourns PTC Reset Fuse 1 0.134 0.134 10 Newark 83K0399
47uF Tantalum 1 0.4029 0.4029 10 Newark 60R5862
LTC6903 1 3.33 3.33 5 Newark 57M0173
10uF Tantalum 2 0.168 0.336 20 Newark 01M8216
USB B Connector 1 0.646 0.646 5 Newark 14N8154
RCA Connector 1 0.7582 0.7582 5 Newark 89K7618
VGA Connector 1 1.3 1.3 5 Newark 54M6031
NCP1117ST33T3G 1 0.387 0.387 10 Newark 67H7013
3 Bit DIP Switch 1 0.22 0.22 10 eBay
XC95144XL 1 5.8 5.8 5 Digikey 122-1372-ND
IS61LV5128AL-10TLI 1 4.39 4.39 10 Jameco
.1uF Ceramic X7R 11 0.008 0.088 4000 Jameco
PCB Service 1 1.19 1.19 10 Elecrow PCB
1uF Ceramic 1 0.008 0.008 Owned
Male Headers 18 0.001 0.018 Owned
10k 0805 1% Resistor 6 0.008 0.048 Owned
4.7k 0805 1% Resistor 1 0.008 0.008 Owned
510 0805 1% Resistor 4 0.008 0.032 Owned
1k 0805 1% Resistor 5 0.008 0.04 Owned
2k 0805 1% Resistor 4 0.008 0.032 Owned
4k 0805 1% Resistor 1 0.008 0.008 Owned
Shipping 1 3.079 3.079 10 Various

A lot of the 'Owned' stuff is eBay specials.  The resistors mostly came from a single resistor sample pack and were, surprisingly, in spec (at least when I pulled them off the strips).

My guess: with zero wastage, $23.37 a board.  I'll be soldering manually, so there are some hidden costs:

So: $23.37 - $32.50 a board in small quantities, depending on your level of soldering competency.  Plus that hour of your time - you'll have to value it yourself (I run a finance web site, and we've discussed that exact topic - you can't use what you make at your day job).  In short, if I was selling these and soldering manually, I'd be charging a bit more than $0.

Discussions