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Norm 10/12/2020
This is a really nice little unit. The screen is bright and there is a lot of information provided. Note that it is measuring at the source, not the output. What I mean buy this is that if nothing is plugged into it, you still get a reading, albeit small since this is the power required for the electronics of the unit and the display. This amount is negligible. I use this to diagnose issues with charging, what is great is that it shows the charging protocol that is being used. For example when charging my Samsung 10e, if the phone battery is low it fast charges at about 13W, when the phone's battery is about 85% it dials back the charge current and voltage. This device allows you to see what is going on. This is especially useful on wilderness camping trips when charging from a solar panel.
DC Digital 30 В 5A USB Тестер Ток Напряжения Измеритель Емкости QC 2.0 3.0 FCP AFC DCP Детектор Power Bank Индикатор зарядного устройства
US$13.99 US$16.99
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Norm 10/12/2020
Looks well made, but haven't tried it yet. A couple O rings came with the product.
IPRee® Brass На открытом воздухе Плита Преобразователь BBQ Газовая баллонная горелка Регулятор бака Клапан Адаптер пополнения Кемпинг Пикник
US$7.99 US$9.99
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Norm 30/05/2020
So I put it together and it didn't seem to work so I pulled out oscilloscope and did some troubleshooting. I notice some other comments that I will address in the construction notes. 1) LED - The cathode (short lead) goes in the hole on the inside of the board. 2) Glue the coil to the board. I used a poly urethane cement only because I had it handy. I also put some glue over the wire where it comes off of the coil to protect it from breaking. 3) The real key though was the diameter of the primary (2.5 turns) coil and the direction it is wound (opposite to 320 turn coil). I used terminal connectors that allowed me to try different coils. The same number of turns, but with a wider diameter worked very well. I also used a thicker gauge of wire (not sure if this really made a difference). Operation - I used a laptop power supply 16.5V at 4.5A although I doubt it drew very much. - There was a visible corona, followed by a strong smell of ozone. (Note that ozone is hazardous to your health.) - When I had the tight 2.5 turn coil installed, LED1 didn't come on, the neon (gas) bulb lit, but barely. With the wider 2.5 turn coil, both LEDs were lit. LED2 only shows that power is applied. - I was able to light up a compact florescent tube, the neon bulb lit up when held a couple inches away. Measurements - The waveform on the collector of the NPN TIP 31 transister showed a square wave with a fundamental frequence of about 4.5MHz with a harmonic riding on top of it of about 50MHz. - The amplitude was about 55V and varied with slight adjustments to the primary coil. Assuming (and this is a rough assumption as there are other factors involved) that the ratio was 320/2.5 turns between the secondary and the primary, the voltage is thus about 7KV. Note again through this is at a very high frequency which is the magic of tesla coils. High frequencies travel on the outside of conductors. If you do touch the corona, it will burn through your skin (your skin is an insulator).
DIY Мини-модуль катушки Тесла Geekcreit®, несобранный 15 Вт DC 15-24 В 2А плазменный динамик электронный комплект
US$9.39 US$6.54
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Norm 29/05/2020
Used it for the first time last night with an old IBM laptop power supply. I have used a lot of soldering irons in the past as I used to work in the electronics industry. So far I really like this unit. I was surprised at how quickly it heated up and the amount of heat it was able to deliver to the tip. I like that it regulates the heat much more accurately than my old Weller temperature controlled iron. If future performance is anything like my first experience, I definitely recommend this product. A bit pricey, but you get what you pay for.
MINI TS100 Цифровой OLED-программируемый интерфейс DC5525 Пайка Утюг-станция Встроенная STM32 Версия для чип-сапфира
US$56.19 US$74.43
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Norm 05/06/2019
Sturdy and works well. Only issue is that the rubber end cap that protects the car from the pedal comes off easily.
Многофункциональное золото Авто Дверная педаль Складная грузовая дверь безопасности Hammer Помощь в сборке крыши
US$17.44 US$20.93
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Norm 05/06/2019
I haven't used it yet, however looks well made, equivalent to a similar part I paid double for here in Toronto.
Угловой направляющий выступ для ножевого точилка для точильного камня камень шлифовального станка Аксессуары кухонных ножей
US$4.63
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Norm 05/06/2019
Display is clear and provides good information
RUIDENG AT34 USB3.0 IPS HD Цветной экран USB Тестер Напряжение Ток Емкость Энергия Измеритель Мощности
US$15.99 US$19.99
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Norm 05/06/2019
Good little charger, works well.
Liitokala lii-202 5V 2A 18650/26650/16340/14500 Micro USB Батарея Зарядное устройство
US$12.99 US$17.99
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