So, about 28mA. Summary. But if necessary, there will be a small display meter for all kinds of experiments at hand. Brand new and high quality. Plug and play, no extra power supply needed. Taught by the previous meter, we check the lower voltage from which this device will work. And if it doesn’t differ much from the tester, it’s generally wonderful. Moreover, 100 rubles. Moreover, the Chinese decided that the current consumed by the observer would be about 2 times more interesting than the voltage. 🙂 Otherwise, how else can you explain such temporary display parameters? Here is such a hundred-ruble horseradish. Size: 5.2cm x 1.5cm x 3.4cm. Okay. Received with a difference of 1 day. The device is simple as a brick. For no tuning elements were found on the board. Oops. And there, as you know, there should not be more than 5.2V. Must have, yes And then it turns out that with the promised 0.2V falling on the device at 3A, we will get a device that refused to charge at the output. And… oh-pa. However, the Chinese forget to do this. At low voltage, a difference in the brightness of the indicators is visible. WTF. This is where simplicity turned out to be worse than theft. Resolution: voltage 10mV, current 1mA. Here is one of those moments. And there is no need to mess with wires, cut cables and perform other excesses.
I don’t know when it appeared on BIK, but I caught my eye just recently. Arrived https://tonaton.ng/s_250-bow-ties. We left China 3 days apart. Switches between volts and amps independently. For I do not aim to finish off the device. Interference from the brushed motor clogged the power rail so much that the device simply turned off incredibly. What is set up at the factory, then we will use it. Now let’s see how much the meter itself consumes. Connect to an adjustable PSU and turn the knob. There are few of them. 🙂 Under the output connector there is a diode that protects against reverse polarity. Plug it in and look. It’s just a display. Of the minuses – you can call floating values. As a result of digging on the table for the subject of “what else to measure?” a USB fan was found. Better, of course, 3.5. NO Retail Box. The device is small, which can be seen directly from the photo. What we need. Checked by connecting the mouse, smart. And again the tricks of the mail.

USB voltage and current meter

If there was an LCD, I would eat half or three times less. And again, the protective film on the indicators is visible, which must be removed after installation on the board. Don’t pay attention to the shadows running across the indicator – this is a lag when the refresh rate of the display and the video camera are superimposed. I will not check the upper limit. They don’t exist in life. Naturally, red light through blue glass distorts the native color of the indicators. It can measure the current and voltage of the power supply equpment with USB port. Firstly, in domestic use, it is simply not necessary to measure something on USB with high accuracy. Shows the current consumed by the device connected to the USB. This moment, in fact, is not too critical. Unpacked, look. What they promise: Yeah, they didn’t lie, they were sold. What – did not see. Again, we will use an adjustable PSU and a tester. And there are two digits after the decimal point. Plus – it is usable. Workable range: U=3.5 – 7.0V, A=0 https://tonaton.com/s_20-shoe-racks – 3A. Well, stress, of course. Well, what can I say? Pretty normal readings. Simple and works. Transparent plastic is both a housing and a light filter for indicators. Error range: voltage Full-scale voltage drop:200mV. The voltage and current will be displayed circularly. So he has a resolution of 10 units for both voltage and current. Less than a 4-port hub. Its purpose is purely to freeze USB. Naturally, I connected. Which by no means allows us to enjoy watching the promised "1 mA". Quite sour. And something else. In order to determine the suitability of the port on the computer for https://jiji.co.ke/cars/volvo-xc90-2004 charging; see the current given by the powerbank; determine how much the tablet eats in charging mode – good! Lack of any settings, buttons, etc. will not be stressful. The order was broken into two parcels. What can I say? Shows something. What we actually have: Packed Safely in Bubble Bag. Well, I threw in the order. Package Included: And the current will increase. And here the consumption is increased by LED indicators. At the maximum current, they promise a voltage drop on the meter of 0.2V. But if you remember that this is just a pakazometer, there is no particular minus. Bude, whoever wishes, can break the case and build it into some 5-volt charger. At the same time, we catch the Chinese in a lie: the last digit is occupied by the symbol of the current value – current or voltage. If you ever thought about how much this or that device consumes from USB, remember about the device the next time you visit BIC. At the same time, let’s check where it measures the voltage – at its input or directly at the load? Oh, on load! It’s honest. When viewed through the transparent plastic details are visible. small sized, easy and convenient to carry. Workable temperature: 0 – 60℃. It really starts with a voltage of 3.1V. Although, on common sense, what for should we measure fans? Tea, in everyday life around everything is electronics, not electromechanics. Let’s check the measurement accuracy. Designed for inquisitive minds. The work of USB devices on your computer does not interfere. 1 x USB Current And Voltage Tester I don’t want to break the case – it is glued around the entire perimeter. It may remain 4.8V or even less. In the measurement cycle, the numbers jump several times. The tester is needed here because it has a greater resolution and accuracy than the PSU indicators. Because pulling it off is not a problem – a matter of seconds. A hundred rubles is not money, and you can always find a place for a device in a drawer. Considering that on normal charging it can be 5.2V, we will unscrew the voltage more. We learn the order of values ​​- already good.