Polyphonic FM Synthesizer with STM32F031

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ihsan Kehribar @ blog.kehribar.me has been working on a MIDI capable, polyphonic FM synthesizer using an 32bit ARM Cortex M0 microcontroller and an audio codec.

Polyphonic FM Synthesizer with STM32F031 – [Link]

Arduino OLED Thermometer And Hygrometer With DHT11

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KonstantinDimitrov @ instructables.com has build a Arduino based OLED Thermometer and Hydrometer using DHT11 sensor.

Hello, everyone ! Today I am going to show you how to make Arduino OLED thermometer and hygrometer* with DHT11.

The OLED we will use today is .96″ inch in size, features 128×64 pixels and uses the SPI Bus.

We will use the u8glib library to communicate with our display. This library has many available parameters(download it and unzip it at /Program Files(x86)/Arduino/Libraries).

Arduino OLED Thermometer And Hygrometer With DHT11 – [Link]

1.2V TO 35V DC-DC CONVERTER

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1.2V to 35V Adjustable DC-DC Converter project has been design around TI’s LM2576-ADJ IC. Inputs supply 40 VDC. LM2576-ADJ is a monolithic integrated circuit that provides all the active functions for step down switching regulator, capable of driving 3A load with excellent line and load regulation.this board has minimum number of components.

Features

  • Output 1.2 to 35 VDC @ 3 A regulated low ripple DC voltage
  • Onboard potentiometer for output voltage adjust
  • Onboard bridge rectifier for AC voltage input
  • LED indication at input
  • Screw Terminal connectors for input and output
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 70 mm x 63 mm

1.2V TO 35V DC-DC CONVERTER – [Link]

transmission: A Creativity Measurement System

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jwitzleben @ instructables.com has build a creativity measurement systems based on Arduino UNO and Flora boards.

It can be too easy to get stuck overthinking your ideas and letting your gears grind without making any progress. As makers, designers, engineers, hobbyists, etc. it is crucial for us to get out of our heads and sketch out our ideas as they come. It takes practice, but ultimately the more we sketch, the more we can create and the better we can share our ideas.

transmission: A Creativity Measurement System  – [Link]

FT900 – flexible bridge between interfaces

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FT900 is 32bit RISC MCU developed for high speed, interface bridging tasks.

FT900 provides a large amount of connectivity options. To name only a few, FT900 can:

● process data from parallel camera input and send them via Ethernet
● transform data from camera to create bitmap compatible with FT8xx (EVE) and send it through SPI to display
● collect and process data from available interfaces and store them to SD card
● communicate with wireless modules connected to SPI or UART and send data through Ethernet, USB or CAN interface
● play music stored on SD card by using of external codec connected to I2S interface.

Software development is supported by:

● GNU Tool chain (GCC compiler, binary utilities, GDB debugger) integrated with Eclipse IDE with C/C++ plugin (CDT)
● UMFTPD2A debugger/programmer (1-wire debugging seamless compatible with GDB)
● MM900EV2A evaluation board with front-facing 1,3M pixel camera module, optimized for use in home security, industrial control, home/building automation systems, data logging and embedded multimedia applications.
● MM900EV-LITE optimized for HMI and embedded display applications

The first samples of FT900L-T, MM900EV2A, MM900EV-LITE and UMFTPD2A can be found in our stock. For FT90x series overview please see MCU brochure.


FT900 – flexible bridge between interfaces – [Link]

Fluke – Quality First

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All of us desire to have quality things for us art is almost a necessity. Quality multimeter saves time for those we are used to from the brand FLUKE.

All of us have experienced in your life situation where a quality product saved us a lot of time and energy. Whether it was an ordinary screwdriver or fork wrench or pliers or quality meter. High quality – this is what FLUKE focusing on. This company is well known among the technically skilled customers.

Take for example the range of measured capacity – FLUKE 287 and FLUKE289 measure up to capacity of 100mF – it is not common for other producers. Frequency range – or measurement range of these multimeters is up to 1MHz, which also can not be found in a mid-range instruments, not to mention the accuracy of the readings – 50000 counts with basic accuracy 0,025% VAC and VDC, 0,15% at current measurement. Of course there are voltage measurement (up to 1000V), current (up to 10A), temperature, resistance and short circuit.

This great instrument (Fluke 289 / EUR) you get now from us also with a set of accessories and practical bag, PC software included (Fluke 289 / FVF / EUR). For those who do not need a high-end multimeter FLUKE has more affordable models, for example sériu FLUKE 17x series or series FLUKE11x, of course, also in FLUKE quality.


Fluke – Quality First – [Link]

L293D Motor Controller Tutorial

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Sooncheng @ instructables.com shows us how to control a DC motor using the L293D IC and an Arduino:

L293D is a chip that enable us to control two motors together with only one Arduino board or other microcontrollers. However, I was having a project that required controlling four DC motors together. Recently i brought a L293D Arduino Shields , it covered all of my pins that i need to use them to connect with other breakout board to combine with the motor controller (of course you can buy a L298N motor controller) . I made it, so i decided to share it with u guys now. So let’s get started.

L293D Motor Controller Tutorial – [Link]

PWM Halogen Lamp Dimmer

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High Current PWM Halogen Dimmer controller project is designed around SG3525 IC and High current MOSFET. Project can handle lamp up to 5 Amps (10Amps Possible with big heat sink) and supply 12-24V DC .Ideal for Halogen Dichroic Lamp or Halogen Lamp.

Specifications 

  • Supply input 15 to 24 VDC
  • Load-Lamp 12 to 24 VDC @ 5 Amps (10amps possible with big heat sink on Mosfet)
  • Onboard preset for frequency adjust
  • Frequency adjustable 4 KHz to 30 KHz
  • PWM Duty cycle 0 to 100% (+/- 5%)
  • Potentiometer for dimming adjust
  • Soft Start facility
  • Clamp diode for protection
  • Power-On LED indicator
  • Compact design and high quality
  • Lamp and supply connection via screw terminal connector
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 56 mm x 42 mm

PWM Halogen Lamp Dimmer – [Link]

LT8331- Low IQ Boost/SEPIC/ Flyback/Inverting Converter

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The LT8331 is a current mode step-­up DC/DC converter with an internal 500mA, 140V switch. It operates from an input voltage range of 4.5V to 100V, making it suitable for use with a wide range of input sources found in industrial, transportation and avionic applications. The LT8331 can be configured as either a boost, SEPIC, flyback or inverting converter. Its switching frequency is programmable from 100kHz to 500kHz, enabling designers to minimize external component sizes. Burst Mode operation reduces quiescent current to only 6µA while keeping output ripple below 20mV. The combination of a high voltage MSOP­-16E package and tiny externals ensures a very compact footprint while minimizing solution cost.

LT8331 – Low IQ Boost/SEPIC/ Flyback/Inverting Converter – [Link]

Voice Changer

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Voice Changer project can be used to transpose or distort one’s voice by encoding the sound appearing at the Microphone input. This project is built around AP8072 IC.

Specifications

  • Supply input : 6 VDC @ 200 mA
  • Output : Speaker, 8 Ω / 0.5 W
  • Audio amplifier type LM386 with volume control preset
  • Jumper selectable tone frequency for encoding sound
  • 4 Tones to choose
  • Built in noise reduction circuit for reducing environment noise
  • On/Off Jumper connector for power supply input
  • Berg connector for power supply input and speaker output
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 48 mm x 52 mm

Voice Changer – [Link]