Re: Cheapest object sensor on the market!

On Apr 6, 2:59 pm, larwe <zwsdot...@xxxxxxxxx> wrote:
On Apr 6, 5:38 pm, linnix <m...@xxxxxxxxxxxxxxxxxx> wrote:

MSP430F20xx, which is very cheap in large quantity - well under
your
price target.

Probably not. The OP wants $1 total BOM. Lets figure 0.25 for PCB,
0.25 for LCD, 0.40 for LCD controller. The uC needs to be less

No, you can drive the glass directly from the MSP430.

The cheap one does not have integrated charge pump.
If you rely on constant 3V supply from a button cell, it will last
only a couple of hours. LCD would be unreadable below 2.5V. Avr169
can run for a few days, as low as 1.8V, but not for under a dollar.

So 0.25 for PCB,
0.25 for LCD leaves 0.50 for the micro. Definitely achievable in
volume.



I got confused!

..25 for PCB
..25 for LCD
..50 for Micro
?? Batteries !!

The sensor, is this going to detect with out a sensor module and what
about the coin batteries! i need to run for at least 30 hours.
.

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