Recycled Planets's pages

This is a simple scale that I made from recycled components:

You can see that I attached plastic containers from Ricotta cheese to three 30 cm rulers on top of a plastic bottle filled with water.

Initially I was considering submitting only a photo of my idea to the Recycled Planets Wix website. However, then I decided that this project needs a more detailed implementation description.

Step 1: Drill the Hole

Each ruler had only one hole at one end. Thus I had to drill a hole on the other end of the ruler with my Ozito electric drill.

I connected multiple rulers to metal vice and one of them did crack during drilling because I used a very thick drill bit.

Step 2: Attach Plastic Containers

I attached plastic containers with metal wire.

Container 1:

Container 2:

I used additional metal wire connections:

Outcome:

Step 3: Attach the Plastic Bottle

I attached a plastic bottle from Scott's hand sanitizer with Raffia Pollot ropes.

Step 4: Testing

I filled the bottle with water because I could not keep both ends of the scale equally balanced and levelled in the air:

The main features of this article include:

- a high power metal wire stand,

- the propeller that I made from metal wire and masking tape to save money on a plastic propeller.

I made this product many years ago and made a few modifications recently as well as taking photos and videos:

Thus you can trust its reliability.

The fan is made from a cheap and fast 3 V DC motor.

The modifications to original design include:

- separating the two wire terminals separate to avoid a short circuit due to wire pulling,

- attaching blue tack to prevent the fan from vibrating on the table.

You can see this device working in the following YouTube videos:

You can see my device working in the video:

I ordered a USB solar charger from China. It took a long time to arrive but when it came it was a kit. There were missing parts. There was no wire to attach the solar cell to the USB power supply and the rechargeable battery was missing. I figured I could use the USB power supply if I connect it to wind generator. I could not find a use for the bright LED that came with the kit.

Yesterday I found this article on https://instructables.com:

https://www.instructables.com/id/Cheap-Colour-Lights/

Step 1: Design the Circuit

I drawn the following circuit on PSpice student edition:

The method for calculating the maximum LED current is explained in the Instructable.

Step 2: Build the Circuit

I chosen Rv1 as only 100 ohms because my power supply is 3 volts. You cannot see it in the photo because it is behind the potentiometer. Rv2 is an 2 kohm resistor that I had for many years from an old appliance that I taken apart many years ago.

My hobby solder would not stick to PCB tracks and the holes were very small. Thus I used wire wrap wire.

i attached the circuit to foam packaging material piece with high power insulated wires and attached the potentiometer to the packaging foam piece with 2 mm metal wire bits.

You can see that in the video that the connections are not very reliable.

Probably I should have tried drilling the holes to make them wider or using solder flux to allow sticking of solder to the PCB tracks.