Zohaibmaroof
Member level 2
how to drive a vibration motor(cell phones) with variable speed using 89c51 & DAC0808
I am in the end of my final year project that is BLIND PERSON NAVIGATION SYSTEM
using 89S51
DAC0808
Ultrasonic range finder SRF04
LF351 op-amp
2n2222 transistor
i am just now facing a problem , i want that when a person come closer to sensor (SRF04) the vibration motor starts vibrating and when person or obstacle come closer to sensor vibration becomes more means smaller the distance between sensor and obstacle greater the vibration produce
but PROBLEM is motor just vibrate with different speeds when obstacle come in the range of sensor how do i make smooth increase in voltages which is given by DAC0808 to op-amp LF351 to make vibration according to the distance
please help me out this thing will improve me project performance and will make it more efficient
I am in the end of my final year project that is BLIND PERSON NAVIGATION SYSTEM
using 89S51
DAC0808
Ultrasonic range finder SRF04
LF351 op-amp
2n2222 transistor
i am just now facing a problem , i want that when a person come closer to sensor (SRF04) the vibration motor starts vibrating and when person or obstacle come closer to sensor vibration becomes more means smaller the distance between sensor and obstacle greater the vibration produce
but PROBLEM is motor just vibrate with different speeds when obstacle come in the range of sensor how do i make smooth increase in voltages which is given by DAC0808 to op-amp LF351 to make vibration according to the distance
please help me out this thing will improve me project performance and will make it more efficient