MichaelMeissner
Senior Member+
I've been looking at the various low cost voltmeters and ammeters, and many can measure the total watts that goes through the circuit, such as:
But what I'm curious about is in addition to the total watts, what is the maximum amps (or watts since the voltage is usually constant) that was used at any particular point of time. In particular, I'm looking at powering cameras using either 9v batteries or USB batteries using a 9v boost, and I'm wanting to get a handle on how much power the camera needs, when I'm doing an operation (focusing, shooting 4K video, etc.), and also for sizing of batteries and voltage boosters. Right now, I'm just looking at the display and mentally seeing what the number is, but I can miss some peaks.
There is a new monitor that I just noticed that seems to have a bluetooth function, and it can send data to an app on the phone, and it has a graph. However, it is only USB, and ideally, I would like to run it on other batteries as well:
It is kind of hard to tell from the sales page exactly what kind of measurements are done.
So am I missing something? Ideally there is a unit that can handle 3-12 volts, with a optional 5v input for the display, and fairly cheap (preferred to be under $20, I might settle if it is under $30).
But what I'm curious about is in addition to the total watts, what is the maximum amps (or watts since the voltage is usually constant) that was used at any particular point of time. In particular, I'm looking at powering cameras using either 9v batteries or USB batteries using a 9v boost, and I'm wanting to get a handle on how much power the camera needs, when I'm doing an operation (focusing, shooting 4K video, etc.), and also for sizing of batteries and voltage boosters. Right now, I'm just looking at the display and mentally seeing what the number is, but I can miss some peaks.
There is a new monitor that I just noticed that seems to have a bluetooth function, and it can send data to an app on the phone, and it has a graph. However, it is only USB, and ideally, I would like to run it on other batteries as well:
It is kind of hard to tell from the sales page exactly what kind of measurements are done.
So am I missing something? Ideally there is a unit that can handle 3-12 volts, with a optional 5v input for the display, and fairly cheap (preferred to be under $20, I might settle if it is under $30).