Hello Brmlog readers!
While Biiter and Stick are working hard on the software, and firmware, our hardware developement is now on debug phase.
I found lot of things what need to be improved or totaly changed ...
I also made some calculations to be sure how much money we spent on this project. Here are the results :
Part | Value | price 1pcs | price 100pcs |
C1 | 10uF | 0.18 | 0.156 |
C2 | 10uF | 0.18 | 0.156 |
C3 | 100nF | 0.15 | 0.105 |
C4 | 10uF | 0.18 | 0.156 |
C5 | 10uF | 0.18 | 0.156 |
C6 | 10nF | 0.15 | 0.105 |
C7 | 10nF | 0.15 | 0.105 |
C8 | 100nF | 0.15 | 0.105 |
C9 | 100nF | 0.15 | 0.105 |
C10 | 100nF | 0.15 | 0.105 |
C11 | 100nF | 0.15 | 0.105 |
C12 | 100nF | 0.15 | 0.105 |
C13 | 100nF | 0.15 | 0.105 |
CN1 | miniUSB conn | 0.639 | 0.542 |
IC1 | 741G3157DCKR | 0.743 | 0.308 |
IC2 | 741G3157DCKR | 0.743 | 0.308 |
IC3 | 741G3157DCKR | 0.743 | 0.308 |
IC4 | 741G3157DCKR | 0.743 | 0.308 |
IC5 | 741G3157DCKR | 0.743 | 0.308 |
IC6 | 741G3157DCKR | 0.743 | 0.308 |
L1 | 100uH | 0.422 | 0.358 |
LED1 | Green 1206 | 0.186 | 0.149 |
R1 | 33R | 0.12 | 0.03 |
R2 | 33R | 0.12 | 0.03 |
R3 | 1k5 | 0.12 | 0.03 |
R4 | 150R | 0.12 | 0.03 |
R5 | 10k | 0.12 | 0.03 |
R6 | 3K9 | 0.12 | 0.03 |
R7 | 300R | 0.12 | 0.03 |
S1 | tactswitch | 0.639 | 0.542 |
SV1 | header conn | 0.271 | 0.229 |
SV3 | header conn | 0.271 | 0.229 |
SV4 | header conn | 0.271 | 0.229 |
U$1 | AD9835BRUZAD9835BRUZ | 25.51 | 16.57 |
U$2 | MCP6S21-SO8 | 2.699 | 1.241 |
U$3 | MCP6S26-SO14 | 4.746 | 2.438 |
U1 | LPC1343_QFP | 7.31 | 4.376 |
U2 | LM1117SOT223 | 1.567 | 1.241 |
U3 | OSCILLATOR 50MHz | 6.683 | 4.18 |
U4 | OSCILLATOR 12MHz | 6.683 | 4.18 |
PCB | PCB | 14.744 | 5.71 |
SUM | 80.009 | 45.841 |
All prices are in USD.
You can say ... $80 for board with ARM processor is so much, but as you can see we implemented DDS generator which can handle the signal generation so MCU has a much more time to do other stuff like communicating trough USB or AD conversion.
... more info and videos coming soon
Sargon