Interfacing MSP430g2553 with PIR motion sensor

RUPESH KUMAR

Other Parts Discussed in Thread: MSP430G2553, TXB0304, TXB0302, LSF0101, LSF0204, LSF0108, LSF0102

I am doing my project on Visitor counter ,for this i am using HC-SR501 PIR sensor which gives DC output (3.3 v for HIGH and 0V for LOW).I am usingP2.0 of MSP430g2553 pin to interface it. The voltage across the P2.0 Is 1.06 V.So, how should i Interface it?

over 8 years ago

0 Nirav Patel over 8 years ago

TI__Expert 6335 points

Rupesh,

To support level translation from 1.06V to 3.3V some example devices are:

TXB0304 and TXB0302 (0.9V to 3.6V).
LSF0101, LSF0102, LSF0204, and LSF0108 (0.95V to 5V).

What other requirements do you have? Examples include:

1. Number of channels?
2. Data Rate?
3. Signal direction (uni-directional, bi-directional)?

Best Regards,
Nirav

0 RUPESH KUMAR over 8 years ago in reply to Nirav Patel

Prodigy 80 points

Thankyou sir for your valuable reply.

This is my description of what i am doing:-
i am doing a project on Visitor counter which increment the count when someone enters into the room and decrements the count when they leaves out. the count is displayed on seven segment displays. I am controlling and electric bulb using relay which is turned off when count is zero and turned on when count not equal to zero.
for detection purpose i am using two Hc-SR501 Pir sensor which gives digital output i.e. when it detects it changes it value from 0 v(LOW) to 3.3 v(HIGH).

Sir,My doubt is that

i)can i interface this pir sensor directly with MSP430G2553 which itself require 3.3 volt VCC to operate?
ii) Which relay should i use it and how can i connect it to the ELECTRIC BULB which is directly connected to Home electric supply?

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Interfacing MSP430g2553 with PIR motion sensor