Is the DVM continuity check the best way to check SHORTS?
How do you measure Shorts with a negative supply?
Positive supply circuit:
When you set your DVM to continuity to measure shorts when the POWER IS OFF, so the circuit under test doesn't have power on its off, is this the best way to measure shorts?
1.) When i put the "power" to the circuit under test then the shorts appear
2.) Why does shorts only appear when their is power to the circuit but not when the circuit doesn't have power i don't read any shorts?
3.) If i measure with the "continuity check" on my DVM to find a short in the negative supply lines , its going to BEEP because the negative voltage is below ground making it act like a short when it isn't?
4.) When using the " continuity check " audio beep, how do you know if its a short?
Continuity check for shorts"
If i put my Black probe on the ground and then using the RED probe from node or PCB pad one at a time until i hear a "audio beep"?
But i found that the audio beeps with negative voltages so it fakes the DVM out , acting like a short when its not is this true?
Would reversing the RED and BLACK probe on continuity check when measuring negative supply help out to find out if its a short or not?
How do you guys check SHORTS on a PCB ? nodes and traces?
Because when you look at the PCB under a microscope i still can't see any shorts visuallly at the nodes or traces
Its weird how the SHORTS only appear when the voltage is applied but not when their is NO power
But i have found SHORTS also when NO power was on
Whats the differences between these types of shorts?
How do you measure Shorts with a negative supply?
Positive supply circuit:
When you set your DVM to continuity to measure shorts when the POWER IS OFF, so the circuit under test doesn't have power on its off, is this the best way to measure shorts?
1.) When i put the "power" to the circuit under test then the shorts appear
2.) Why does shorts only appear when their is power to the circuit but not when the circuit doesn't have power i don't read any shorts?
3.) If i measure with the "continuity check" on my DVM to find a short in the negative supply lines , its going to BEEP because the negative voltage is below ground making it act like a short when it isn't?
4.) When using the " continuity check " audio beep, how do you know if its a short?
Continuity check for shorts"
If i put my Black probe on the ground and then using the RED probe from node or PCB pad one at a time until i hear a "audio beep"?
But i found that the audio beeps with negative voltages so it fakes the DVM out , acting like a short when its not is this true?
Would reversing the RED and BLACK probe on continuity check when measuring negative supply help out to find out if its a short or not?
How do you guys check SHORTS on a PCB ? nodes and traces?
Because when you look at the PCB under a microscope i still can't see any shorts visuallly at the nodes or traces
Its weird how the SHORTS only appear when the voltage is applied but not when their is NO power
But i have found SHORTS also when NO power was on
Whats the differences between these types of shorts?