Dimlet – The Smart Light Dimming Device

In present days, many households have been equipped with dimmers, which are devices that used to vary the brightness of a light. By simply decreasing or increasing the RMS voltage, it’s possible to vary the intensity of the light output. Although variable-voltage devices are used for various purposes, the term “dimmer” is normally mean for those intended to control lightning. Usually, dimmers range in size from small units (light switch used for domestic lightning) to high power units (large theatre or architectural lightning installations). Most of the small domestic dimmers are generally directly controlled by a digital control system. Our today’s project, Dimlet is a good example. The Dimlet is a smart light dimming circuit, as it used the TRIACs to control the dimming of lightning. The software on the microcontroller plays an important role. It has the commands containing a light ID and an intensity are received through the UART. Each time, when the AC voltage goes to zero, the light items are sorted by intensity. Hence, all those lights that don’t have an intensity of 100% are turned… Continue reading

AS7010 STMeter – The Handheld Installation Tool

You’re in search of a handheld installation tool, but you couldn’t find what you’re looking for until now? Oh well, you should stop for a while and have a closer look on this AS7010 STMeter, as it might be the thing that you’ve searching for a long time! The AS7010 STMeter is based on PIC16F877, as it provided sufficient I/O pins to drive an LCD and interface to the keypad. Beside that, the PIC16F877 contains a UART and ADC as well. Hence, the power can be supplied by the maintenance port of the Subscriber Terminal via a step down regulator. For your information, the AS7010 STMeter is connected to the ST Antenna Unit to give the following information: The Visual antenna panning aid in the form of a bar graph (It indicates received signal level automatically) The Numeric Receive and Transmit levels The Numeric Carrier to Interference levels RF channel number and PN code When you’re attaching the STMeter to the ST maintenance port, the UART will be used to pass information to the main ST processor using a SLIP… Continue reading

Seeker II – The Interactive Mini-Sumo Robot

For those that always involved themselves in the “Mini-sumo competition”, the Mini-sumo robot is very common to the developers. No matter you’re the amateur or the professional in the robotic development field, this Seeker II is going to amaze you here! For your information, this Seeker II is a low, fast and very aggressive mini-sumo robot, where is equipped with wide tires that provide a lot of traction than other mini-sumo did. The Seeker II’s brain is based on a Microchip PIC16F876 and is programmed in C language. Beside that, there PIC16F876 have several useful features, such as: It has two-channel hardware pulse width modulation (PWM), which is mainly for providing precise control over the speed of the two motors. Four analog to digital converters (ADC) are used to interface to two range-finder and two edge-detector sensors. A 16 bit hardware timer (It increments a 35 bit integer millisecond counter). The hardware UART, where is used to program the PIC using the bootloader and to run a menu-driven debug system. The EEPROM is used for a simple log to show… Continue reading

AVRcam – Low Cost Image Processing Engine with More Frames Per Second!

You love to take beautiful photos anywhere, anytime? However, you can’t find the methods to build the camera, where can track many objects at multiple frames per second? Hold on and take a deep breath, as you’ve found what you’re looking for after in such a long time: The AVRcam. The AVRcam is a standalone image-processing engine based on the Atmel ATmega8 microcontroller. What is the specialty of this stuff? Well, it has an engine that capable of tracking eight objects of eight different user-defined colors, at 27 frames per second! Below here are some useful features of AVRcam: It provides real-time tracking statistics through an UART. It can track image resolution of up to 88 X 144 pixels at 27 frames per second. It built on the open source software and hardware, where you can download the programs from the internet instantly! The main purpose of this AVRcam is to enable mobile robots to perceive their environment in a small form factor, lower-power consumption and high capability package. The AVRcam allows the user to take photographs and the photographs… Continue reading