I did a couple of things at work today that i don't understand
1.) I had to measure a signal from the microcontroller
To measure this signal , First i had to put a 1ohm resistor into the batterys and to the PCB and measure the voltage using the oscilloscope and Fluke meter which was across the 1 ohm resistor . The tech wanted me to use the oscilloscope in normal trigger mode to see the microscontrollers signal flashing at a interval rate.
It was just an DC voltage flashing at a time interval, but what is confusing for me is this
1.) The oscilloscope or multimeter wasn't fluctuating or pulsing using the 1 ohm resistor. It only worked when you put a 10ohm or 15ohm resistor not the 1ohm resistor, why is that?
2.) Once We got the oscilloscope and DVM meter to see the DC fluctuating and pulsing , the tech wanted me to count how many times in a minute did it pulse at. It was 30 pulses in a minute. The tech did some match by taking 30 pulses and 1 minute of time and used a formula to convert that into a time interval but i don't know how, do u guys know?
1.) I had to measure a signal from the microcontroller
To measure this signal , First i had to put a 1ohm resistor into the batterys and to the PCB and measure the voltage using the oscilloscope and Fluke meter which was across the 1 ohm resistor . The tech wanted me to use the oscilloscope in normal trigger mode to see the microscontrollers signal flashing at a interval rate.
It was just an DC voltage flashing at a time interval, but what is confusing for me is this
1.) The oscilloscope or multimeter wasn't fluctuating or pulsing using the 1 ohm resistor. It only worked when you put a 10ohm or 15ohm resistor not the 1ohm resistor, why is that?
2.) Once We got the oscilloscope and DVM meter to see the DC fluctuating and pulsing , the tech wanted me to count how many times in a minute did it pulse at. It was 30 pulses in a minute. The tech did some match by taking 30 pulses and 1 minute of time and used a formula to convert that into a time interval but i don't know how, do u guys know?