UNLEASHING SUN'S POWER ! (1)strontiumtoad (30)in #dtube • 6 years ago (edited) Practical application of a solar concentrator with a Fresnel lens that I got from an old projection TV. If the water boils, it works. But I must be careful and not to burn the wooden frame... ▶️ DTube ▶️ IPFS #solar #energy #homemade #steemstem