How do you make a Fresnel lens projector?

How do you make a Fresnel lens projector?

Step 2: Things That I Used in My Pj.

1. Play wood (mdf) sheet to make box.
2. Fresnel lens. I used 120mm fl and 185 mm fl.
3. Triplet lens. I used 200mm fl.
4. Condenser lens.
5. 100w high power led with driver.
6. LCD panel and its controller. I used 1280*800 7”
7. 12v adapter for exhaust fan and lcd.
8. Cpu exhaust fan to make projector cool.

Which lens is used in homemade projector?

Convex Lens

What type of lens does a Fresnel have?

A Fresnel (pronounced fray-NEL) lens replaces the curved surface of a conventional optical lens with a series of concentric grooves. These contours act as individual refracting surfaces, bending parallel light rays to a common focal length (Figure 1).

Can you make a Fresnel lens?

You can make your own Fresnel lens for solar cooking by recycling old rear-projection television screens. You can often find these TVs for free or cheap on Craigslist or at garage sales. The television does not have to work, but the screen has to be intact to be able to use the lens.

What Obsidian is used for?

Obsidian was used to make knives, arrowheads, spear points, scrapers, and many other weapons and tools. Once these discoveries were made, obsidian quickly became the raw material of preference for producing almost any sharp object.

Is it safe to put obsidian in water?

These crystals are safe to cleanse using water, take baths or prepare moon water. Black Obsidian (FYI: can break in EXTREME cold or hot water temperatures!)

Can I put black obsidian in water?

Black Obsidian (FYI: can break in EXTREME cold or hot water temperatures)

Can Jasper go underwater?

Hard Crystals that are Safe in Water: Most Quartz Crystals: Clear Quartz, Amethyst, Smoky Quartz, Rose Quartz, Citrine, Snow Quartz. Agate. Aventurine. Jasper.

Can I put snowflake obsidian in water?

Snowflake Obsidian Metaphysical Properties and Benefits The stone is also effective against the hardening of arteries. The easiest way to harness all of these positive properties is to place it in a glass of water.

Who should wear snowflake obsidian?

This natural snowflake obsidian bracelet can be worn by both men and women. It looks very solid and well made. The stones are shiny, very smooth, consistent in size (around 8 mm), and heavy – the real deal.

What are the benefits of snowflake obsidian?

A stone of purity, Snowflake Obsidian provides balance for body, mind and spirit. It helps you recognise and release “wrong thinking” and stressful mental patterns. Promotes dispassion and inner centring. Snowflake Obsidian empowers isolation and loneliness, aiding surrender in meditation.

What is special about Obsidian?

Obsidian is quite unique due to its smooth, uniform volcanic glass texture. Obsidian is usually considered an extrusive rock, because it usually solidifies above Earth’s surface where the edges of a lava flow come into contact with cool air or water. One of the most unique features of obsidian is how it breaks.

What is the difference between snowflake obsidian and black obsidian?

The only difference between snowflake obsidian and black obsidian pieces are the “snowflakes” that you see on its surface. As fascinating as they are to look at, they have a rather simple explanation – they are called “spherulites” and they are essentially just needle-shaped cristobalite, which is a type of quartz.