The Samsung charger's output has quite a bit extra sound when compared to the iPhone charger. This is certainly seen inside the thickness and jaggedness with the yellow output curves.
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Hi Nameless! I borrowed a Tektronix TDS5104B oscilloscope, which is very good but fiendishly costly. As opposed to getting the Tektronix, you might like to get a Rigol and also a new car or truck :-) I am unsure what probes ended up connected.
The HP touchpad charger seems like a rather greater Model of my previous Palm Pre charger. I checked, the prongs twist off in the identical way, had that For some time, never realized. It could be great to find out it analyzed too.
Dilemma: if you have been employing generic cheapo chargers with no unwell effects does that indicate they're okay or I must cease using them mainly because they will hurt the cellular link phone after a while?
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The graphs were produced utilizing the X-Y method about the oscilloscope, Along with the load voltage as Y and The existing as X. I utilised a .twelveΩ existing feeling resistor to measure the load present-day.
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But a powersupply could be built to provide say one.1A consistent current at powerup, and change to continuous-voltage mode once 5V is reached. From then on it's going to shutdown when 1.2A is touched...
The graphs In this particular part require a little bit of explanation, and that is supplied inside the diagram under. The voltage/recent load curve demonstrates the effectiveness with the charger beneath distinct hundreds.
I couldn't discover any UL safety approval on this charger, but I did locate a report of 1 catching fire. Motorola
A bad design and style can experience a number of problems. If the output voltage will not be filtered effectively, there'll be sounds and spikes due to high-frequency switching. At Intense stages this could injury your telephone, but the most common symptom is the touchscreen isn't going to operate although the charger is plugged in. A next trouble will be the output voltage might be influenced from the AC enter, triggering a hundred and twenty Hz "ripple".