The Geek Group has lots of interesting equipment but the Thumper Project is one of the most impressive. The system has gone through 7 revisions so far and more are in the works. Our friend Bob Davis has been making lots of similar devices but on a bit of a smaller scale. “Thumper is a High Energy DC Impulse Generator that is capable of producing a 1,800 Volt discharge of
This robot by Oddbot is a great example of what can be done with IR light. `The eye consist of 4 IR LEDs and 4 pairs of photo transistors. The phototransistor pairs are connected in parallel to increase their sensitivity. The phototransistor pairs are then connected to your analog inputs the same way you would connect an LDR. This circuit is really 4 FritsLDRs but using phototransistors instead of LDRs.
Designing a circuit requires reading lots of data sheets. The data sheets contain lots of parameters, for Flash memory one of those values is the number of times the device can be read and written to. In the case of a Microchip 24AA01-I/P 128byte I2C EEPROM the rated number off write cycles is 1 million. Our friend Ian Lesnet from Dangerous Prototypes has designed a device he calls the Flash
If you are a retro gamer have a look at this cool Typewriter Joystick, no it isn’t just a gutted typewriter with a joystick mashed in. Many of the keys are functional through to the computer that it is connected to. It might not be the most agile gaming interface but it is certainly one of the most creative I have seen! Via: TechEBlog
Laser harps seem to be catching on. This one is a work in progress and believe it or not there is no microcontroller or computer controlling the system. For more information have a look at the project page (translated version). “This is my first video showing the sensor-circuit working, that contains 4 opamps (LM358) and only has a +5V supply (no negative supply). You can understand it’s a challenge to
Our friend Csaba Bleuer sent in this crazy project he completed. It is a Rotating LED Globe which is being driven by a ATMega Microcontroller. The globe image was created using a program called BmpToAscii, with this program an image can be converted into Ascii. In this case the Ascii is used to display the globe! We have seen some other spinning LED globes in the past but this one
This cool PIC Microcontroller based IR to Remote Control Project allows you to program codes from a standard remote control to control this small module. When setup you will be able to control two items from across the room. If you attempt this project make sure you are careful since line voltage is involved. Thanks Muris. “Features of current beta version of firmware: – Controlling two independent appliances via remote
