Home Blog  





25 Nov 2014

picture

This project provides some lighting effect by the blinking pattern of the bulbs connected at its output. Up to 8 Bulbs can be connected in between connector CN2 to CN9 and AC power to control them should be connected at Connector CN10. DC Power should be applied at Connector CN11 in accordance with the polarity marked on this connector. Care should be taken while using this it as it contains Main Power on the board.

Microcontroller based running light controller - [Link]

25 Nov 2014

spi_diagram_good

Most Arduino SPI tutorials show this simple but poor SPI bus design. In this article a new approach is discussed.

Better SPI Bus Design in 3 Steps - [Link]

25 Nov 2014

IMG_20141117_205724-600x450

Sjaak posted pictures of his password manager build in the project log forum:

I was frustrated by trying to remember my passwords for all my websites and got even more frustrated when i need to change a password again after some months. Dont even to mention the needed complexity of them nowadays. A bit insired by the mooltipass featured on hackaday, but too scared of the complexity and hugeness of it, I decided to roll my own.
Also I’m not a terrorist nor a high placed public person, so I dont need that high encrypted and bulky design. Prolly the NSA would crack this thing in a matter of days (minutes?) but I think it will keep your pr0n logins safe from your little brother ;).

Password manager - [Link]

24 Nov 2014

apps3

An app note from Atmel, digital sound recorder with AVR and DataFlash (PDF!):

This application note describes how to record, store and play back sound using any AVR microcontroller with A/D converter, the AT45DB161B DataFlash memory and a few extra components.
This application note shows in detail the usage of the A/D Converter for sound recording, the Serial Peripheral Interface – SPI – for accessing the external DataFlash memory and the Pulse Width Modulation – PWM – for playback. Typical applications that would require one or more of these blocks are temperature loggers, telephone answering machines, or digital voice recorders.

[via]

Digital sound recorder with AVR and DataFlash - [Link]


22 Nov 2014

Interfacing a cheap phone camera module to a PIC32 microcontroller – [Link]

22 Nov 2014

simple-auto-irrigation-system-600x345

Here’s an automatic watering system using AVR from Gadgetronicx:

Primitive irrigation systems possess many drawbacks as it fails to conserve water and human energy. So introducing Automation in it can help us to overcome these drawbacks and pave way to conserve water. This can be done with a simple Soil moisture sensor and a Microcontroller, AVR in our case. You can try out this system to automate watering the plants in your home at affordable cost.

[via]

Automatic plant watering system using AVR(Atmega16) Microcontroller - [Link]

22 Nov 2014

Atmelsam

by elektor.com:

Although not officially released until December we were able to get a glimpse of Atmel corporation’s SmartConnect SAM W25 module at electronica 2014. This small module has been designed for use in IoT edge node applications. Edge nodes are parts of the IoT infrastructure where information interacts with physical events; these devices might, for example be inputting information from sensors or outputting control actions. The nodes also need to adapt the information to and from the network and provide data security.

Atmel’s IoT Edge Solution - [Link]

17 Nov 2014

apps11

An app note (PDF!) from Renesas on how to minimize power consumption when sensing switch inputs

A switch input is one of the simplest interfaces to an MCU. However, when very low power designs are needed the pullup or pulldown resistor for the switch can draw a significant current. If the switch input is a momentary switch the current flow is very short so it is rarely significant. However, if the switch input is a door switch or level sensing switch
or any other switch which may remain in the active state for a relatively long time the energy used must be considered
Most of the discussion that follows gives examples for pull-up devices with the switches, the same principles apply for pull-down components. Also all the discussions assume that the EVdd = Vdd (all ports powered from the same supply voltage).

[via]

Minimizing power consumption when sensing switch inputs - [Link]

15 Nov 2014

dsc_5950

by Matt Richardson @ makezine.com:

Spark has improved and expanded their product line with the Photon wi-fi development board and a pair of new wireless modules for custom circuit boards. The Photon improves on the popular Spark Core microcontroller by adding 802.11n wi-fi connectivity, SoftAP for provisioning, more memory, and a faster ARM Cortex M3 processor. Like the Core, it sits right into a standard breadboard for easy prototyping. And best of all, it can be had for $19.

Photon – A Wi-fi Microcontroller for $19 - [Link]

10 Nov 2014

obr1617_1

New „hardwired“ TCP/IP chip from company Wiznet resists attacks, it´s fast and consumes only a minimum energy and host MCU resources.

TCP/IP solutions from company Wiznet are known by its resistance resulting already from their principle . all the solution is hardware-based, thus it´s not possible to change a basic functionality of a device (flooding, spoofing, …). W5500 outstands by its “modesty” – it only requires a few GPIO pins of a host MCU – thanks to a high speed SPI interface (up to 80 MHz) and it also has a very low power consumption. A result of a small consumption is, that the chip heats up to approx. 40´C at a common operation, in contrast to other similar chips, which usually have 60-70´C at operation. This naturally means a higher reliability, possibility of a more dense placing of components and elimination of problems with overheating of a device built-in into a small enclosure.

Energy saving is also enhanced by Power Down and Wake-on-LAN (over UDP) modes. Single 3,3V are enough for power supply, while inputs are 5V tolerant. Status is indicated on LED outputs (full/half duplex, link speed, active) and the chip contains a built-in OS Linux (kernel 2.4.xx, 2.6.xx, 3.1,xx) & RTOS driver.

In our offer can be found the W5500 chip itself W5500-EVB evaluation board, as well as a ready-made module WIZ550S2E-TTL or WIZ550io. Examples of a real usage of Wiznet chips can be found in the document Wiznet application reference.

W5500 will resist hackers attack and save energy - [Link]



 
 
 

 

 

 

Search Site | Advertising | Contact Us
Elektrotekno.com | Free Schematics Search Engine | Electronic Kits