A suitable tool to safely discharge capacitors is needed when you want to work with circuits that have dangerous voltages inside them. Typical examples of such devices mains powered switch mode power supplies (you need to safely discharge main capacitor) and different cameras (the flash unit has a large capacitor charged to 400-500V voltage). Those →
In my previous posting Current sensor for multi core cable is talked about measuring AC current flowing on cable where you don’t get access to individual wires. In that posting I mentioned that I saw Modern Device blog article Current Sensor that seem to be doing exactly that. This sensor is designed for providing an →
I bought some time ago Key Style Stainless Steel Hot Swapping USB 2.0 Flash Drive – Silver (8GB) hoping to get a nice USB memory that I can include to my keyring. The product got even some good reviews at Dealextreme product page. At first everything looked good. The good things was that this product →
I wrote last week about EMF measurements. Here is more information on the DT-1180 2.3″ LCD Screen Electromagnetic Radiation Detector I used for electrical field measurements. DT-1180 2.3″ LCD Screen Electromagnetic Radiation Detector is a meter designed for electric fields and RF field measurements. DT-1180 2.3″ LCD Screen Electromagnetic Radiation Detector measures low frequency electrical →
I wrote about EMF measurements and told that for magnetic field measurements I have used Velleman Magnetic Field Detector VTEMF. Velleman describes the product uses: “Detects the harmful electromagnetic fields generated by high voltage cables, computer and television screens, microwave ovens, waterbeds, electric blankets, etc.”. That sounds reasonable. The description continues “Scientists believe that electromagnetic →
Logic Sniffer Java client is an alternative OLS-client provides a software client for the Open Bench Logic Sniffer logic analyser hardware (that is based on ideas from open source SUMP analyzer). Software works also with SUMP compatible devices and Bus Pirate hardware. When tested with the demonstration data the software seemed to work quite well →
Many thousands new electronics products were announced during the past year. EDN Hot 100 products of 2012 article lists the ones that especially caught the attention of EDN magazine editors and readers. They range from ICs and components, to software, test instruments, development tools and sensors, and more. Take a look at this list. →
phatIO a different way of interfacing a computer with the world that you might be used to. I first saw phatIO uses file system to control external hardware article at Hackaday.com that mentioned phatIO. phatIO is an USB I/O device that uses a mass storage file system for control. Using mass storage for I/O controlling →
Netduino is an interesting dev board built around the .NET Micro framework with the goal of being compatible with Arduino shields. Netduino is an open source hardware platform that can run .NET Micro Framework 4.2 code. The Netduino is a dev board built around the .NET Micro framework with the goal of being compatible with →
H-bridge circuit is a very useful in electrical motor controlling. You can drive a DC motor easily at both directions with H-bridge, and if you add some PWM to driver circuit you can even control the motor speed on both directions. There are very many simple H-bridge circuit designs in Internet. Nowadays there are many →