I needed to replace few burned 50W GU10 halogen bulbs with LEDs. A standard 50W halogen lamp outputs 400 lumens so I needed to find a reasonably LED bulb that gives around the same light output. I could live with slightly less, but not too much less. I found suitable looking product AIRAM LED 4W →
I saw an interesting kit at banggood.com and decided to try it: DIY Meter Tester Kit For Capacitance ESR Inductance Resistor NPN PNP Mosfet M168 . The reasons for interests are good specifications, based on open source hardware design and price is reasonable ($12.22 / 9.37 Euro). DIY Meter Tester Kit For Capacitance ESR Inductance →
Have you ever wondered how stable voltage your USB power source gives and how much current does your device take (your mobile phone charging or own circuit? 0.28″ LED 3-Digit Red Display USB Power Charger Data Transmit Current Voltage Tester (3~10V/0~3A) is a product that can do that. It shows the charging voltage and current →
Interfacing digital electronics to analog world is needed in many applications. There have been several attempts at devices that might be called field-programmable analog arrays (FPAAs) over the years, but most have failed to establish a significant market presence (maybe except Cypress Semiconductor PSoC). The Analog Swiss Army Knife article tells that without a proper →
I have read more than year ago (2012) interesting articles about Digilent‘s Analog Discovery Kit. I even quickly tried the WaveForms Software the cames with it (freely available and testable without hardware). It looked interesting, but I decided that maybe I don’t at the moment need this and skipped it (I did not even write →
I found a cheap mixed signal oscilloscope product: HT-USBee AxPro. This HT-USBee AxPro is a said to be 8 Channel Logic Analyzer Oscilloscope Compatible USBee AX Pro I2C IIC SPI CAN Debugger. It features Oscilloscope Input (single channel, 16Msps, 3MHz bandwidth) and 8-CH Logic Analyzer. With suitable software it can be used as Data Recorder, →
I was some day wondering how to connect IO to Android smartphone or tablet.One well known option is to use IOIO or IOIO-OTG board connected to Android device USB port. The IOIO (pronounced “yo-yo”) is a board specially designed to work with Android devices and robust connectivity to an Android device via a USB or →
Arduino Leonardo is a micro-controller board based on the ATmega32u4. This board form factor and functionality is quite similar to Arduino UNO (7.1 cm x 5.3 cm x 1.5 cm ; 20 g) , with the exception that the USB interface is built into the micro-controller itself instead of using external serial-USB converter IC on →
When testing with Arduino circuits, it is often useful to see digital signal states on different pins. It is easy to measure single signal pin state with multimeter, but when you want to monitor several pins visually you need something else. One useful option is to use LEDs connected to pins to show their state. →
The Arduino Ethernet Shield allows you to connects Arduino to your local LAN or Internet with Ethernet connection.. Just plug Arduino Ethernet Shield module onto your Arduino board, connect it to your network with an RJ45 cable. The original Arduino Ethernet Shield is based on the Wiznet W5100 Ethernet chip. Arduino IDE comes with example →