Tag Archives: Arduino

HiFi Passive Preamp


FutureSharks @ github.com has build a very nice HiFi passive preamplifier controlled by an Arduino board.

It has the following features:

  • Volume control and input selection via encoder and Apple remote.
  • Uses a 256 step R2R relayed based attenuator.
  • Completely passive.
  • Only 5V power required.
  • Adafruit NeoPixel shows volume level with colour.
  • Sleep mode with low power consumption: 0.9W.

HiFi Passive Preamp – [Link]

RedBear Duo: A small and powerful Wi-Fi + BLE IoT board


A thumb-sized, Particle-powered, Cloud-connected IoT board with Wi-Fi + BLE that supports Arduino, JavaScript and soon Python too!

The Duo is a thumb-size development board designed to simplify the process of building Internet of Things (IoT) products. The Duo provides everything you need—Wi-Fi, BLE and a powerful Cloud backend, all in a compact form factor that makes it ideal for your first prototype, a finished product, and everything in between.

We’re also introducing the RBLink, an expansion board for the Duo that allows you to attach additional sensors and modules without any soldering. You’ll have all the tools you need to get your prototype up and running in no time.

RedBear Duo: A small and powerful Wi-Fi + BLE IoT board – [Link]

Mango: A Compact Size FPGA Research Platform


An arduino-compatible FPGA platform that can be used for a wide range of applications.

The Mango is a compact field-programmable-gate-array (FPGA) platform that can be used for a wide range of projects, such as signal processing, mobile computing and robotics.

FPGA Mango board comes with a soft-core Nios II processor running on an Altera Cyclone IV FPGA. The board comes with 16MB of SDRAM, 16Mb EPCS flash memory, and a micro SD card slot. The FPGA Mango board also comes equipped with 9 degrees of freedom IMU (with temperature sensor) and four PWM motor controllers, which makes it a perfect solution for many applications, including robotic applications.

Mango: A Compact Size FPGA Research Platform – [Link]

POWER PLAY – Arduino based smart power monitors


POWER PLAY are Arduino based smart power monitors that are used to measure and optimize the power consumption of battery operated devices such as smart phones.

This model provides the most accurate results but requires modifying the tested device. The POWER PLAY 3.8V outputs regulated 3.8 volts are simulates the power provided by a single cell Li-Ion battery cell. It requires disconnecting the battery from the tested device and hooking the output of the POWER PLAY 3.8V instead.

POWER PLAY – Arduino based smart power monitors – [Link]

XLR8: Arduino-compatible FPGA-based Application Accelerator


XLR8 has both an ATmega328 clone and custom accelerator blocks on an FPGA and uses the standard Arduino IDE for programming.

XLR8 is a drop-in replacement for an Arduino Uno, but with a twist. It is an Arduino-compatible board that uses a Field-Programmable Gate Array (FPGA) as the main processing chip.

The FPGA provides a reconfigurable hardware platform that hosts a clone of an ATmega328 microcontroller. The FPGA also provides the ability to implement custom logic that accelerates specific functionality known to be slow or otherwise problematic for the standard 8-bit ATmega328 microcontroller.

The FPGA-based hardware acceleration and offload provided by XLR8 results in significantly improved performance in the same physical footprint and using the same tool chain as standard Arduino Uno boards.

XLR8: Arduino-compatible FPGA-based Application Accelerator – [Link]

AVR Programmer Shield


ohneschuh @ instructables.com has build a Arduino Shield that is able to program spare ATmega328 and ATtiny85 mcu using the ISP sketch.

Beside my Arduino instructables I also use pure ATmega328 and ATtiny85 microcontrollers. To program them I normally used a breadboard and the ArduinoISP setup with an Arduino UNO or NANO. But this was not the best solution.

So I build this programmer shield in my typical stripboard layout: Only straight lines – no crossings!

AVR Programmer Shield – [Link]AVR

Bluetooth enabled Door locker using Arduino


Frank Donald @ gadgetronicx.com has build a bluetooth controlled door locker using Arduino. Source code included:

DIY Arduino based lockers can be found plenty in the internet where keypad was used to feed lock input. But this Bluetooth enabled Door locker uses Bluetooth as a medium to connect with the locker and your smart phone to feed input credentials. This locker allows you to lock/unlock your locker without physical touch when you are within the range of Bluetooth communication.

Bluetooth enabled Door locker using Arduino – [Link]

Arduino Motorized SMT Solder Paste Dispenser


by zapta @ thingiverse.com:

This is a motorized solder paste dispenser for soldering SMT boards. The home directory of this project is on github here https://github.com/zapta/misc/tree/master/paste_injector and it include hardware and firmware design of a compatible controller board that is Arduino compatible (it looks to the Arduino IDE as an Arduino Pro Mini).

Arduino Motorized SMT Solder Paste Dispenser – [Link]