>On Apr 6, 5:52=A0pm, "raedarrar" <i...@0-800.tv> wrote: > >> detection distance between the hands and the device if i use anAC-coupled=> >> circuit, can i determine the distance, and how far if so? > >You cannot determine the distance. You can detect if someone walks by >or if someone waves a hand over the sensor. You can't tune the circuit >to trigger on a finer resolution than that. >Ok, great, i have expressed myself wrong, then how much would you thing this will go for (100,000 units) do not forget he power source too, what king of coin battery would it need for 30 to 50 hours on.
Cheapest object sensor on the market!
Started by ●April 6, 2008
Reply by ●April 6, 20082008-04-06
Reply by ●April 6, 20082008-04-06
>On Apr 6, 2:59 pm, larwe <zwsdot...@gmail.com> wrote: >> On Apr 6, 5:38 pm, linnix <m...@linnix.info-for.us> wrote: >> >> > > MSP430F20xx, which is very cheap in large quantity - well underyour>> > > 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. >Can i use a LED that changes to a dif. colors (total of 4 colors) every time it count a vote, would it consume less energy than LCD and be readable in sun light? are they less expensive than 1 digit LCD now a days?
Reply by ●April 6, 20082008-04-06
On Apr 6, 3:33 pm, "raedarrar" <i...@0-800.tv> wrote:> >On Apr 6, 2:59 pm, larwe <zwsdot...@gmail.com> wrote: > >> On Apr 6, 5:38 pm, linnix <m...@linnix.info-for.us> 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. > > Can i use a LED that changes to a dif. colors (total of 4 colors) every > time it count a vote, would it consume less energy than LCD and be > readable in sun light? are they less expensive than 1 digit LCD now a > days?You would need a few mA for the LED. AVR can run with LCD for 40uA. Reflective LCDs are readable in direct sun light.
Reply by ●April 6, 20082008-04-06
On Apr 6, 9:51 am, "raedarrar" <i...@0-800.tv> wrote: ...> Low life sensor, whichever would be the cheapest solution.I think I get it. It's something to detect the spammers, sporgers, off-topic cross-posters, etc. that clog up the Usenet. JM
Reply by ●April 6, 20082008-04-06
>On Apr 6, 2:59 pm, larwe <zwsdot...@gmail.com> wrote: >> On Apr 6, 5:38 pm, linnix <m...@linnix.info-for.us> wrote: >> >> > > MSP430F20xx, which is very cheap in large quantity - well underyour>> > > 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.
Reply by ●April 6, 20082008-04-06
On Apr 6, 3:57 pm, "raedarrar" <i...@0-800.tv> wrote:> >On Apr 6, 2:59 pm, larwe <zwsdot...@gmail.com> wrote: > >> On Apr 6, 5:38 pm, linnix <m...@linnix.info-for.us> 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.Using uC and PIR (Infra-Red heat sensor). .20 for Battery (CR2032). Here is a picture of an LCD in direct sunlight. The CR3032 will last about 100 hours. http://linnix.com/proto/battery-tester.jpg
Reply by ●April 6, 20082008-04-06
linnix wrote:> On Apr 6, 3:57 pm, "raedarrar" <i...@0-800.tv> wrote: >>> On Apr 6, 2:59 pm, larwe <zwsdot...@gmail.com> wrote: >>>> On Apr 6, 5:38 pm, linnix <m...@linnix.info-for.us> 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. > > Using uC and PIR (Infra-Red heat sensor). > > .20 for Battery (CR2032). > > Here is a picture of an LCD in direct sunlight. The CR3032 will last > about 100 hours. > > http://linnix.com/proto/battery-tester.jpgInteresting LCD display, where do you get it ? donald
Reply by ●April 6, 20082008-04-06
On Apr 6, 5:17 pm, donald <Don...@dontdoithere.com> wrote:> linnix wrote: > > On Apr 6, 3:57 pm, "raedarrar" <i...@0-800.tv> wrote: > >>> On Apr 6, 2:59 pm, larwe <zwsdot...@gmail.com> wrote: > >>>> On Apr 6, 5:38 pm, linnix <m...@linnix.info-for.us> 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. > > > Using uC and PIR (Infra-Red heat sensor). > > > .20 for Battery (CR2032). > > > Here is a picture of an LCD in direct sunlight. The CR3032 will last > > about 100 hours. > > >http://linnix.com/proto/battery-tester.jpg > > Interesting LCD display, where do you get it ? > > donaldWe custom order them from factory. It's 12 segments x 4 commons for a total of 48 display elements.
Reply by ●April 6, 20082008-04-06
raedarrar wrote:> Hi all...I need the cheapest possible object sensor on the market to embed > it onto a circuit board, any range between 100mm to 0mm, even a touch or > pressure sensor which ever is cheaper. CapSense from Cypress is a perfect > solution for my application because of its size, would not have been for > the price ($1.40). Is any one knows of a cheaper solution and that it > would not need a micro controller. I do not need a long life sensor as it > is a disposable kind of product. >If it has to be cheaper just make you own capacitive sensor: http://www.nfilter.org/download.html I won't be nearly as good as CapSense but if there is no other choice, what can you do? Just be aware that you need to also include some kind of high pass so only fast movements trigger it. Requires lots of testing so that, for example, it doesn't react to a large mass (like a person) slowly moving in and out of the field. -- Regards, Joerg http://www.analogconsultants.com/
Reply by ●April 6, 20082008-04-06
>linnix wrote: >> On Apr 6, 3:57 pm, "raedarrar" <i...@0-800.tv> wrote: >>>> On Apr 6, 2:59 pm, larwe <zwsdot...@gmail.com> wrote: >>>>> On Apr 6, 5:38 pm, linnix <m...@linnix.info-for.us> 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 forPCB,>>>>>> 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. >> >> Using uC and PIR (Infra-Red heat sensor). >> >> .20 for Battery (CR2032). >> >> Here is a picture of an LCD in direct sunlight. The CR3032 will last >> about 100 hours. >> >> http://linnix.com/proto/battery-tester.jpg > >Interesting LCD display, where do you get it ? > >donald >Is the $0.25 for the screen shown above? How can i demand this kind of brightness when i order one? does it have specifications? How about using solar thick-film batteries like the ones they use on these calculators to prolong the life of the battery. would this be a cheaper option understanding that will only be used when there is lights. Regards, Raed
