Electric fans continue to sell at a steady pace, despite the widespread use of air conditioners. Recently, models have begun to appear on the market with features such as a variety of blade shapes, silent operation, and better air efficiency. Electric fans are also increasingly being used in concert with air conditioners to save electricity through better cooling efficiency.
Renesas offers microcontrollers such as the 4286 Group which is ideal for remote control function, the RL78 Family, the R8C Family, and the 78K Family which are ideal for system control, and TRIACs and photocouplers for peripheral components. We offer the best solutions for electric fan systems.
Renesas Computerized Electric Fan - [Link]
Jan_Henrik @ instructables.com writes:
In this project i want to show and explain you a range sensor with ultrasonic and a 20×04 lcd screen. I wrote the code for this project myself and added lots of comments, so that everybody can understand it and use it for other projects (maybe a light range sensor?!). It is easy to build and much more easier to program, it just requires a few cheap parts and can run on battery, for a portable rangefinder.
The maximum rated range is 500 cm, the range is measured 20 times per seccond. It is Displayed on a lcd screen which is 20×4 chars big, it has a custom start message, and it can have a custom design while measuring. It will have a backlight LED and can run on every arduino, which has I²C communication. That mean you can run it on an Arduino nano, which is very small. It also requires 5V so it has to be a 5V version of an Arduino.
Arduino ultrasonic range finder - [Link]
smching @ instructables.com writes:
Use a ATTiny85 (can be ATTiny45, ATTiny44) to make an Arduino just for US3.00 and name it as Tiny Arduino.
Tiny Arduino have only eight pins as shown in figure above, Pin4 is ground (Gnd), Pin8 is 5V (Vcc), Pin1 is Reset, Pin2 and Pin3 originally used to connecting the Crystal. In order to utilize all the IO, the internal oscillator (RC Oscillator) is used to replace the external clock which require a crystal. Therefore the Tiny Arduino is now come with five IO. Below shows the Arduino IO functions.
Simplest and Cheapest Arduino - [Link]
Low Voltage Metal Sensor directly compatible with Arduino type computers for Robotics, Hobbyists, & Engineers without using magnets.
The Low Power Non Magnetic Inductive Proximity Sensor is a Great way for Engineers, Makers, and DIYs to easily detect low permeability (non iron) metals such as aluminum. Why aluminum? Aluminum is widely available, inexpensive, very thin, and easy to apply. With a small piece of aluminum attached by tape or glue to almost anything, it can be detected by this Low Power Non Magnetic Inductive Proximity Sensor. Other low permeability metals such as copper can also be easily detected. This sensor is not to be confused with low cost magnetic sensors which obviously need magnets to operate.
Low Voltage Metal Sensor for use with Arduino type board - [Link]
Raspberry Pi has been very popular small computer board. It’s initial layout is quite flexible that allows it to use as standalone computer or embedded device with controllable I/Os. Probably standard Raspberry Pi is more oriented to be small single board computer, where you can connect peripherals like keyboard, mouse, display, Ethernet. The I/O part seemed to be left on a side. Eventually extension boards started to appear to fill the need of functionality like ADC, DAC, more digital I/Os. Eventually you end up stacking stuff on top like Arduino. But we like elegant things don’t we? So Raspberry Pi team has been working on different Raspberry Pi concept – Compute module. This is smaller module which have same BCM2835 processor, same RAM. Instead of SD flash there is a 4Gbyte flash memory. Practically this is it. Module is traced on DDR2 SODIMM sized PCB which actually fits this connector.
Raspberry Pi Compute module - [Link]
by Cabe Atwell:
Law enforcement and federal agencies have been using polygraph machines to detect lies since Cesare Lombroso introduced his blood pressure device back in 1895. Before that? Torture was used as the best method to detect fibs (still is to some extent). Just ask any witch that was present at the Salem Trials and they could probably tell it didn’t work that well. Some analysts will tell you that the eyes are the gateway in detecting if someone is telling the truth or not. They claim the rate a person blinks is a telltale sign of lying as well as not making eye contact or even looking up and to the left or right may be an indication of false pretenses. Some of the early pioneers of computerized polygraph have banded together to form a company, known as Converus, which is developing a new platform that tracks eye movement to detect deception.
Eye tracking system looks deep into your eyes – can tell if you’re lying - [Link]
Once you start building something with microcontrollers, one thing you need to take in to account is programming adapter. This is a device which allows to upload compiled code in to chip. I don’t know if this is still a fun to build your own DIY programming adapter which is not guaranteed to support all chips nor it will be safe and reliable. AVR microcontroller niche is one of most interesting when talking about programmers. If you take a look at AVRDUDE configuration file you will find that there is about 50 of them. Many of them are DIY while other are official.
Choosing right programmer for AVR microcontrollers - [Link]
New version of a favorite RFID module ID12LA will enable you to implement RFID into your device even more easily thanks to a wide range of supply voltage.
Literally “globally known” with an integrated antenna – ID12 and its familiar like for example ID2 or ID20 have earned a big popularity thanks to a flawless usage and reliability. Perhaps the only disadvantage of this module was narrow range of operating supply voltage, what in praxis enabled only usage of 5V DC. New version – ID12LA solves also this small drawback and the new module works in a range of 2.8-5VDC. This also enable their usage even with a 3.3V logic and for example in battery operated devices (3-4x NiMH, or 1x Lithium cell, …) without necessity of DC converters or a precise voltage regulation.
The module ID12LA (range approx. 12cm), as well as ID20LA (range approx.16cm) are in our stable stock offer, similarly also the Mifare version (13,56 MHz) – ID20MFIA. In case, that you prefer the maximum range, it´s possible to use module ID2 supplied with an external antenna (range up to 30 cm).
Detailed information will provide you datasheets at particular types below the article.
RFID module ID12LA will also abide a lower voltage … – [Link]
A flux in a spray from company Kontakt Chemie is a very useful helper for development and production.
Everyone, who´ve ever tried to solder without a flux and then with a flux, probably has seen a big difference in solder spreading and in a resulting joint quality. This effect is very visible on a PCB with bare copper tracks without any surface treatment (for example at DIY production of prototypes) but there´s also a significant difference at boards with a surface treated by tin (HAL) or by gold (Flash, chemical gold,..).
Maybe you have a question, whether it makes sense to add a flux when it already is in a solder wire? Naturally, fluxes in soldering wires are of a high quality and producers of solders (Stannol, Koki, Multicore,…) try hard to reach uniform releasing at soldering and to show a minimum spatter. Mainly at soldering of small joints this spatter often causes, that a flux won´t get to a solder pad, what significantly embarrasses solderability. The charm of a flux is based on the fact, that it is directly on a solder pad and in the desired thickness, which can be influenced by application.Especially at soldering of SMT components it´s often even impossible to solder by a method “solder wire in one hand, soldering tool in another”, because we usually need one hand to hold a component in tweezers and moreover – often even a 0.5mm solder wire is too thick to precisely dose a solder directly to a small component in for example an 0402 package. That´s why we usually solder SMT components by a method of taking a little bit of solder on a soldering tip and then applying to a component. But here´s a problem, that a flux won´t survive this a few seconds long “journey” but it will degrade by evaporation, oxidation,… In contrast a flux applied directly to a PCB will replace a missing flux from a solder wire and the difference in spreading of a solder is really huge.
FLUX SK 10 (originally called also a LOTLACK SK10) is based on the natural rosin (colophony) and after application it creates a thin layer. This layer makes soldering significantly easier and at the same time it protects from corrosion. That´s why the FLUX SK 10 has wide possibilities of usage as an agent for temporary protection and significant improvement of solderability of PCBs, various contacts, cable assemblies, terminals of batteries,…
A big advantage is, that in a dry environment the FLUX SK 10 can be left on a PCB as a final protective layer. However in a humid environment it undergoes hydrolysis and degrades. In such environment, it´s better to use Plastik 70, Urethan 71 or Silisol 73. Detailed information will provide you the FLUX SK10 datasheet.
Make your soldering easier with a Flux SK10 spray - [Link]