This circuit is commonly credited to Japanese multimedia artist Tetsuo Kogawa. It takes audio input through a 1/4″ phono jack and, constructed as shown, without the optional antenna connections, will broadcast an FM radio signal about 30 feet. This is the standard model of Mr. Kogawa’s simplest FM transmitter, which is slightly more complex than […]
Need a bright surface for your projector? Get high gain at low cost using house paint and sandblasting beads.
Shown here is a simple method for A) removing a stay tab from a soda can with the rivet-ring intact, and B) attaching the tab to a wooden frame or board using the rivet ring. The pull-ring is then conveniently used for hanging from a nail.
Cheesemaker Yoav Perry writes: When I began thinking about a sous vide machine that would not cost $400-$5000, I immediately began to understand the enormous potential it has to make a perfect cheese vat. At first, I did sous vide in the cheese vat and that’s where I met Lisa and Abe who inspired me […]
Laser pointer + drop of water = microbial movie theater!
My girlfriend got a microscope packed in a really nice wooden box, which also provides space for all the additional lenses and working materials. But the uses for the microscope were really limited, especially because I rarely have transparent stuff to look at and there was no light bulb built in. It is a nice […]
Build a coffin-shaped card box. Cards get inserted, the spirits get excited!
