Twins_sasa

anyone got any idea about this? thank you pls...

hi guys, i have 1 q. How to make a PDA auto sending a sms whenever it receives a specified voltage signal(eg:5v)? FYI, the 5V input signal is from a ToothPIC. I wan to make it as: whenever the ToothPIC send a 5V to PDA(via Bluetooth), the PDA wil automatic send a sms to a pre-defined receiver. Is there any software available in the market? Thanks very much for reply and helping.

yaya..sorry..you are right, i made a mistake. i got the "unexpected output" is because i connect wrongly some wiring. ya, the output is +5V when moton is detected. But it only last for 3 seconds, then the sensor will go back to ready state (0V). How to make the output voltage last longer so that the ToothPIC can have enough time to perform its task? (last 10seconds will be good enough). Appreciation and Thanks for helping.

ya, i followed your way and the sensor can work already. But when motion is detected, the output of the sensor is very small(<1V), unstable, discontinous and only trigger for around 3 seconds. It's not as the expected +5V. After 3 seconds, it wil back to ready state(0V) again. This is not enough to trigger the ToothPIC to work properly. I plan to have a OP-AMP to boost the voltage. But how about the problem of discontinous output? Any idea or better solution for that? thank q very much for your advise.

i mean is it place the pullup resistor between the ToothPIC input and the N.C contact? or place the pullup resistor between the ToothPIC input and a +Vcc?? if so, the +Vcc should be +12Vdc (same source wit detector +12V i/p) or another pwr source +5Vdc (ToothPIC i/p requirement)??

thx very much for audioguru reply. But the N.C and pullup resistor connected to ToothPIC input are as series or parallel?

from the power supply, i connect the +12Vdc to +i/p, then ground should go to -i/p or COM? since the sensor only have N.C and COM, i/m wondering does it mean when motion is detected, the N.C relay switch will open and no output voltage will trigger the PIC. Is my concept correct? pls advise. thanks very much.

i had bought a motion detector(Paradox DG55). It has 6 pins: N.C, COM, +i/p. -i/p, 2 pins for anti-tamper switch. Some info from the data sheet: Alarm output: Form A relay 100mA/28Vdc, N.C (optional form C relay 500mA/30Vdc, N.C/N.O) Anti-tamper switch: 150mA/28Vdc, N.C Voltage input:: +12Vdc Normally motion detector is connected to alarm. But in my project, my idea is to connect the output of this motion detector to a ToothPIC microcontroller. So when motion is detected, the motion detector will send an output voltage which is connected to input pin of ToothPIC. So the ToothPIC microncontroller is activated everytime when there is an motion detected by the sensor. I'm not sure whether this idea is correct or not. And i want to measure the output voltage of the motion detector(because the input voltage of ToothPIC is only 5-10Vdc). My prob is i don't know how to connect those equipments together. Can anyone teach me how to connect the motion detector with power supply and which pins to be tested with multimeter in order to get the sensor output voltage??? High appreciation to all of u guys reply and help. Thanks very much. i guess it don't have N.O because in the data sheet is stated "N.O optional": Form A relay 100mA/28Vdc, N.C (optional form C relay 500mA/30Vdc, N.C/N.O) , am i right???