This project is an Automatic School bell system. Such a system triggers a bell (or operates any other load) at predifined time. In this version some advanced features are introduced. I used PIC18f4520 microcontroller as the brain of the system. RTC1307 IC is used to maintain the clock,date and day with a 3V backup voltage battery. Bell timings are stored in the internal EEPROM of mcu.
Automatic School Bell - [Link]
This is a 24×6 LED matrix control board based on Syst3mX schematics on Instructables. The board is connected on the LED matrix board and an external MCU or Arduino is required to produce the control signals that are feed on GP8. The circuit is able to drive a 24×6 LED matrix using an external MCU or Arduino board. The LED matrix columns are connected on JP1, JP2, JP3 and the 6 rows are connected on JP7. There is also the option to connect 2 more rows (total 8 rows) to make a 24×8 LED matrix.
24×6 LED Matrix Control Circuit - [Link]
This project is a DC motor driver, suitable for motors that of low or medium power. Allows controlling up to 6 motors or 3 motors if you want to control the rotation of the motors. The controller is build around the IC L293D that can provide 600mA per channel, and a H-Bridge designed with transistors NPN and PNP transistors, than can provide 1.15A per channel.
DC Motor Driver using L293D - [Link]
This is a small circuit with two maxim’s ic, MAX4467 as microphone amplifier and MAX406 as VCO FM transmitter. It’s suitable for short range FM transmittion aka wireless FM microphone.
Here is a very simple, inexpensive and interesting project which provides lot of fun to a home experimenter or hobbyist. This simple transmitter can transmit speech over a short range. It can be used as a simple cordless microphone. The circuit uses two integrated circuits from Maxim. IC1 a MAX4467, is an amplifier raising the microphone signal to a level suitable for frequency modulation (FM). IC2 is a voltage-controlled oscillator (VCO) with integrated varactor (a.k.a. varicap diode).
FM Transmitter MAX4467 & MAX2606 - [Link]
Raffael @ code-bude.net build a webradio by himself. It’s made from an Arduino, an hacked TP-Link WR703N router and some interface parts.
Today I want to present you one of my larger craft projects. This time it is not just about software, but also about the associated hardware. What is it? A web radio!
I like to listen to internet radio stations, but I didn’t want to run my pc only for listening to webradios. Connecting my phone to my stereo either wasn’t a solution, since I’d rather wear this with me, because I don’t want to run for each SMS / Whatsapp message to the music system. And because I always like to tinker, it was obvious to build a web radio as a standalone device myself.
RadioduinoWRT – a do it yourself webradio - [Link]
“Power bank” or a mobile power supply with a USB output can contribute also to your undisturbed work.
Nowadays already almost every battery-operated device with a USB port has a possibility to be operated or recharged through this port. Whether it is a smartphone, external harddrive, various modems, dataloggers and many other specialized devices, almost all of them can be powered/ recharged also from a USB port from an external mobile power source -”Power bank”.
In respect to the fact, that there are still more devices with this possibility, we incorporated to our stable stock offer two types of these power supplies – B110 and B120 from a renowned company Apacer. They differ mainly by a capacity of an in-built battery (4400/ 6600 mAh). B110 has one USB connector with a max. output current of 5V/1A, while a bigger type – B120 features two USB ports with a max current of 1,5A/1A (max 2.1A both ports simultaneously). Both Power banks can be recharged through a micro USB port by means of a supplied short USB cable enabling recharging for example from PC, USB adapter or from still more used wall USB outlets, which are becoming a common part of modern buildings installations, on airports etc. The same micro USB/USB B cable can be consequently used to connect a device which we want to power/ recharge (through an “OUTPUT” connector). A small complement of both types is a 5mm white LED, thus B110 and B120 can serve as a small torch with a long hold-off.
Apacer B110 and B120 – Power banks not only for your smartphones - [Link]
The Oscilloscope Watch by Gabriel Anzziani of Gabotronics:
The Oscilloscope Watch has all the features of a modern watch (time, calendar, alarm, etc…) combined with all the features of the popular Xprotolab (Oscilloscope, Waveform Generator, Logic Analyzer, Protocol Sniffer, Frequency Counter).
Currently on Kickstarter
The Oscilloscope Watch - [Link]
Here is a nice series of 3 video tutorials, covering basic functionality of Cadsoft Eagle from Schematic Capture to CAM Export and PCB manufacturing. The 3 parts are:
- Tutorial 1 for CadSoft Eagle: Schematic Design
- Tutorial 2 for CadSoft Eagle: Printed Circuit Board Layout
- Tutorial 3 for CadSoft Eagle: CAM Output and DFM
Check them out!
CadSoft Eagle Tutorials by jeremyblum.com - [Link]
Wireless technology IQRF was introduced to you in our recent article „IQRF – a wireless technology which breaks barriers“ and in our SOS webinar „How to integrate wireless technologies into your devices without a long-term programming?”. In the time of publishing of the previous article, was the IQRF Alliance launch in a status of intensive preparation. With pleasure we announce you, that from now it´s possible to deploy IQRF Alliance services and to make your development of wireless applications even easier.
What´s all that about? IQRRF Alliance opens to manufacturers, system integrators and installation companies an opportunity to quickly and cost-effectively make all the electronic products wireless without any programming.
IQRF Alliance focuses on extremely easy integration of smart wireless solutions prevailingly in the segments of Indoor Lighting, Outdoor Lighting, Building, Smart Home Automation and many other. Thanks to the revolutionary and patented concept of Direct Peripheral Access and Hardware Profiles, IQRF Alliance members can simply integrate wireless communication and networking into their devices or systems by a simple circuit of a wireless module with a universal DPA application. This will enhance an existing or just developing product with a possibility to communicate in a wireless network, receive and transmit data. DPA moreover ensures a full compatibility of all products using this protocol. New, fully compatible product can be this way launched on the market within few weeks.
IQRF Alliance members will be able to easily and quickly innovate their devices with a wireless connectivity, incorporate full MESH networking into their systems and to use a portfolio of fully compatible products of other IQRF Alliance members.
All details regarding a membership are available at www.iqrf.org/alliance. Membership is without any membership fees. The only “fee” is a 1000 EUR annual credit, i.e. it´s not a fee but a credit for a purchase of IQRF components (transceivers, development boards and kits,…).
IQRF technology features, description of a new IDE4.13 development environment and a new OS3.04 operating system, as well as advantages of membership in the IQRF Alliance can be uncovered already on 23.10.2013 in our SOS webinar about IQRF.
IQRF Alliance brings programming-free wireless networking - [Link]