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Note that this experiment was done with carbon dioxide which produces much coarser bubbles than nitrogen. The finer nitrogen bubbles would diffuse throughout the liquid better. This video is a follow up to the video about the Guinness widget that causes nucleation of nitrogen in the draught cans. Several people commented about emulating it in a clear container with a carbonator. The widget is a ho...

Technically speaking, this is an emergency lightsource that has the dry components of a simple zinc carbon cell. To activate it you add salty water, either as a mixture of salt and water, sea water or urine, and the liquid acts as the electrolyte allowing the cell to operate. The unit is not powered by water. It is powered by the gradual dissolving of the zinc block. The water is just the electrol...

Another pirates-plunder of technical goodies from AliExpress for us to explore. READ THE WARNING ABOUT THE HELL'S SMOKE BELOW! These videos are not sponsored by AliExpress. I buy all these items myself. Here are some links to the items. These are affiliate links, but that will not affect the price you pay. Keep in mind that these products may not meet your country's standards. Some listi...

If I have to be honest, this is a lot simpler than I was expecting. In the past I looked at an older style widget and it was composed of two halves that separated forcibly with a loud pop because it was still under pressure. My guess is that this widget is filled with nitrogen and when the can is sealed, the guinness may enter the sphere and pressurise the gas inside it. When the can is opened and...

This video (which is 5 minutes and 55 seconds long on the watch page) is being released at 5:55am on the 5th day of the 5th month on the 55th anniversary of the 555. There will also be a 55 minute live stream at 5:55pm UK time on the same day. The video is a demo of the extraordinary NE555 timer chip. One of the first integrated circuits that is still in widespread use 55 years after its original...

A live stream to celebrate the 55th year of the classic NE555 integrated circuit. This was one of the first commercially available ICs and is still found in many modern products. You do not need a TV licence to view any of my content on YouTube. ... https://www.youtube.com/watch?v=jzNjFJdaw_I

This is a 12/24V automatic relay tester for vehicles that cycles relays ten times while looking at their contact status and gives an indication of their functioning and reliability. Note that the unit tests the contacts with a current of 100mA and they may not perform the same under high load current. This one has an interesting quirk that I only spotted because I tested it with some relays that h...

Another sack of technical goodies from AliExpress for us to explore. These videos are not sponsored by AliExpress. I buy all these items myself. Here are some links to the items. These are affiliate links, but that will not affect the price you pay. Keep in mind that these products may not meet your country's standards. Some listings may not work for some countries and some may just be sold o...