Herr Manneling

How to make a drum kit out of a lemon

Have you ever been curious to know if you can generate electricity by unconventional means? Have you ever thought of doing it with a lemon? No? Well, now you can play with your pantry, entertain yourself and have some fun.

Battery with lemon

The following video shows the procedure to make a lemon generate some electric current, don't ask for too much as it is only a lemon, but it is still quite entertaining and worth doing, especially if you like scientific curiosities.

How to make gunpowder.


How many of us love fire? and things that explode? making fire nowadays is a simple enough task; but making an explosive is simple too! Well, at least an explosive as basic and as old as gunpowder. In the next post I will leave you with a very simple method of making gunpowder. The materials are very easy to obtain:

  • Potassium nitrate (also called saltpetre, potassium nitrate or potassium nitrate, Chilean nitrate or Chilean salt, available in any pharmacy).
  • Sulphur.
  • Coal.
  • A balance or scale (optional).

The first is available in any pharmacy, it is a relatively expensive compound in large quantities, but if you buy a sachet or a few grams it is quite affordable. Sulphur is also available at any drugstore. The charcoal should preferably be mineral charcoal, due to its thermal properties, charcoal may work, but the explosion will be less powerful, the activated mineral charcoal sold in aquariums is quite useful.

The procedure concentrations are for making black powder, the kind discovered by the Chinese a few hundred years ago. ...

How to make the Weasley's (Harry Potter) magic clock.

Weasley Magic Clock

How many fans of J.K. Rowling's Harry Potter saga have wished they had one of the objects that appear in the story? Surely thousands and thousands, and what better "gadget", artefact or device than the Weasley family clock? That nice clock with hands with the faces of the family members, showing where they are at all times.

Browsing around I came across several projects to realise this ingenious device, including some from Microsoft. Of these, the one that caught my attention the most was a website (yes, a whole website dedicated to this invention!) called themagicclock.com.

On this page you will find the whole project, from the initial research, to the planned future improvements, and of course, the complete procedure to do it. It is a quite complex project, which needs a lot of tools, a firm knowledge of electronics and a prodigious patience, however the final result is wonderful - I leave you a video of how the clock looks like when it is finished:


How to make a homemade bell.

Sometimes we need a doorbell urgently and in specialised shops they sell them as if they were luxury items, sometimes we just have a very high creative spirit and nothing better to do, if something like that has happened to you in this article we will see how to make a bell in an easy, quick and simple way, without so many complications.

How to make a homemade bell. 1

First I leave you the list of materials and then we will see the video of the procedure. We will need:

- Screwdrivers (flat and cross screwdrivers).
- A hammer.
- Needle-nose pliers.
- Masking tape.
- A pair of batteries.
- Varnished copper wire.
- A piece of wood.
- One can.
- Nuts and bolts.
- A cutter or small knife.
- Metal paper clips or paperclips.
- A piece of foil.


How to make a laser that burns.

How to make a laser that burns. 2

How many times have we wanted a real laser The kind we see in the movies that melt steel and fire like ammunition? Well, in the following tutorial we will learn how to make a laser that at least heats and may burn some surface, we will only need:

  • A laser of course, one of those cheap pen lasers you can get anywhere.
  • Flat nose pliers.
  • Small screwdrivers.
  • A welder.

The procedure is in the following video:

Here are the instructions: ...

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