A friend gave me a little challenge: “would you make me a clock that runs on water? Hey Yes!And it’s child’s play!
When I was learning, I already knew this very simple principle… I will explain it.
The idea of this project is to make oneself with recovery materials, and understand its operating principle. And what fun to make a utility object and green with his own hands, it is very educational for children as for adults!
You can customize the entire, with objects from recovery to make a clock to your taste, here are some patterns of my creation:
The origins of this system.
He had to think and yet the principle is as old as the world:
The principle which allows to feed this clock with just a little water comes from electrolysis. This process has achieved for the first time on 2 may 1800 by two British chemists: William Nicholson (1753-1815) and Sir Anthony Carlisle (1768-1840). One of the effects caused by the electrolysis process is called the diminutive redox Redoxreaction. It is an electrochemical reaction, and in the case of our stack, it occurs between zinc, water and copper, transferring the electrons and thus feeding the clock.
How does water clock work?
Electrolysis method to get chemical reactions from electric activations. Simply immerse in water 2 electrodes made of special materials and feeding all for get it. The reaction REDOX, meanwhile, allows for the movements of electrons (i.e. electricity) from chemical reactions. Here at Thembaprograms you can get more different models and styles.
Knowing this, it becomes so relatively easy to manufacture such a clock is, indeed, simply dip a copper electrode (the cathode which is the positive pole), and an electrode of zinc (anode so the negative pole) in a container made of plastic or glass filled with water that is sufficiently mineralized (to conduct electricity at best). Copper blade attracts the electrons released by the blade of zinc. These electrons pass through the wires of the external circuit (the clock). As copper receives electrons, free positive ions from the electrolyte are set on the electrode to balance workloads. The cations present in the electrolyte (Cu2 +) are attracted to the electrode of copper negatively, charged where they receive two electrons and become neutral in settling on the electrode in the form of metal. Zinc cations (Zn2 +) move in the water. For each copper atom that is deposited on the electrode, a zinc Atom happened in solution, releasing two electrons in the circuit and gives two loads to the electrode. The energy produced is small (about 0.8 volts), but enough to feed for several weeks, a digital clock, device consuming very little energy
Now that we know the principle, let’s move on to practical work.
The basics for making a pile in water which meets your clock.
- an electrode in copper, (the cathode which is the positive electrode) and an electrode in zinc (anode which is the negative electrode).
- a container glass or plastic, a circuit which is in our case a small digital clock,
- water which should not be too sweet.
This battery will provide approximately 0, 8V. It will be necessary to make a second, connected in series to the first to get the voltage of 1, 5V. This is enough to power a small clock LCD about the size of a watch for several weeks.
If you want to power a clock a little more greedy energy, such as a LCD clock a bit larger (model for school) or a small needles quartz clock (model Africa or musical), simply increase the number of groups of 2 batteries which will be connected in parallel (increase in the intensity of the current).
The clock made for primary school, to 2 groups (of 2 batteries in series) connected in parallel. A small analog clock hands to 4 groups (of 2 batteries in series) connected in parallel.
In all cases, it must be digital or analog clocks that consume the least possible otherwise your realization will work only a few days, a few hours, and lack of energy you will need to change the water in the battery very often.
Recovered materials, tools and plans to achieve this pendulum in water, in photos!
- Electrodes the simplest method: nails in zinc and copper nail OR the strips of copper and zinc (see photo No. 1)
- Containers: pots in glasses of power recovered (yoghurt, honey, etc.)
- For the maintenance of all: 2 planks of wood 30 x 8 cm, thickness of 1 cm, connected by 4 screws hidden by small plastic tubes
- Of the seals (diameter equal to the opening of the pots) which will be placed between the pots and the top wood Board.Realize them with an old inner tube
- Of the patent to be applied on wood
- 5cm 1.6 cm diameter plastic tube to the 4 holes in the battery water filling
- 4 caps of Cork that will fit on the 4 tubes of filling of tanks
- A small digital clock or a clock analog needle (if you have chosen to put 4 groups of batteries).If you do not, you can find this kind of clock in the stores of electronics like Conrad Electronic for example.
- a saw
- a brush
- sanding paper
- a drill with the below mentioned forests
- a soldering iron
- Tin for welds
At work! do yourself this clock to water
Here are the steps of model produced for the school of bath.
1 take the plank wood dedicated to top of the pile, ask 4 pots-side open- on this, focus all and draw pencil round these 4 pots
- after removing these, draw a center line
- on this line, draw the future 8 holes that will receive the electrodes, at 5 mm from the edges of pots, then still on the median line draw the holes to fill in water, in the center of each pot.Drill the holes of the electrodes with a diameter slightly smaller than the copper and zinc nails, drill the holes to fill with a 16 diameter drill
4 draw holes which will be used to assemble it on the boards and drill with a drill of diameter 5
- place two layers of linseed oil or varnish on 2 boards, after drying put the nails in zinc and copper in force by placing them under the photo.Cut tube PVC of 16 in 4 lengths equivalent to the thickness of the Board and the + 5 mm joint and press them into the 4 holes to fill leaving more than 5 mm on the top
6 Tin solder the wires to the electrodes, following the signs.
- place the seals between the openings of the pots and the top Board
8 assemble everything, using the 4 screws, you can hide by using small tubes whose length is equivalent up to the pots + joints
And the final stages:
- Connect a digital clock or a clock quartz to needles (if you chose the battery 4 items) making sure to connect the most (+) and the minus (-) battery to the corresponding terminals of the clock
- Fill each container to 5 mm from the edge of the pots with water, and a few seconds later, the clock will work for a few weeks
- When the clock will diminish, just simply change the water
For a clock of larger size, here is a hybrid (solar + water)
Below the battery 4 groups for the pendulum of my friend, made entirely with materials of recovery.
Below the clock my friend completed. It’s a hybrid (water + solar), everything comes from the recovery: a piece of black Tin, the solar collector and the electronic part of a small beacon of garden, a CD, a few small stickers to decorate this CD, a clock mechanism recovered, and a lot of patience and attention to detail.
The battery part is easily severable clock on its base (2 screws), to only operate in solar energy for example. Note that this pendulum has an additional function, the system can recharge a LR6 battery in a few hours (the charger is in the back).
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