FireHero – Arduino and guitar play with fire
Chris Marion has developed an impressive and dangerous project: FireHero. It uses a complex propane system and some electric valves coupled to an Arduino controller that hooks directly into a “guitar”...
View ArticleATMega328 RC vs quartz oscillator comparison
Kenneth compares the RC oscillator found on the ATMeg328 against an external quartz crystal. As expected there is a huge difference in precision and stability between the two. This really demonstrates...
View ArticleDongle Shootout: Funcube vs RTL SDR
Kanal von MegaOscarVideos from Germany presents a two-part video comparision of the Funcube dongle and a RTL-SDR DVB-T dongle, in this case a Hama Nano version. The two devices are connected to the...
View ArticleAdaptive brightness control for seven segment LED displays
Raj made a temperature and relative humidity meter to demonstrate adaptive brightness control on a seven segment LCD. The system uses a LDR light sensor in a closed loop to continuously adjust the...
View ArticleJeri’s one-bit ADC
One-bit ADC? Using a single flip-flop Jeri Ellsworth explains the principle behind ADC. This represents a simplified version of Delta-Sigma modulation.
View ArticleTesting the new reduced-sized ICSP connector
This week we received a batch of PCBs and amongst them was the latest revision of our USB TFT breakoutboard. This board is the first board that features a new ICSP footprint, which occupies less space...
View ArticleDEFCON 20: Hacking Measured Boot and UEFI
UEFI secure booting has been on the minds of many hackers and open sources advocates. Some believe that it will lock out certain operating systems in favor of vendor’s proprietary systems. (There have...
View ArticleMiniBasic on STM8
Joaquim reports, “Since I have the STM8S-Discovery I wanted to make a simple version of a BASIC interpreter for it. Had initially thought about converting BASIC to run on the ZX80 STM8S but...
View ArticleTutorial: power line communications
Andrianakis Haris produced this detailed article while completing a thesis toward a B.Sc in Department of Electronic Computer Systems Engineer at Technological Education Institute of Piraeus, Greece....
View ArticlePhotodiode amplifier design
Craig writes, “I recently designed an infrared sensor board (dubbed “IRis”) for my friend’s Defcon talk. This video walks through the circuit design of the photodiode amplifier, and discusses some of...
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