Blue IR: Build your own universal remote

Sarunas built this device to replace a bunch of different remote controls with a smart phone:

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Blue IR

Build your own universal remote

Features include:

  • Control TV, HiFi and more from Android, iPhone or Windows Phone.
  • Control devices using NEC, RC5 and SIRC protocols
  • Provides Bluetooth Low Energy service for controlling it from other devices.

A solar version was also designed to avoid having to change the battery:

Blue IR solar version

Despite that Bluetooth Low Energy device uses so little of it, the battery will eventually run out. To overcome that, the old device was improved by adding a solar charger.

The design files and source code are available on GitHub:

images11 drme/ble-remote

 

Blue IR: Build your own universal remote

ATTiny-Widget

designed this simple board with two ATTiny processors powered by a micro USB connector.

images1ATTiny-Widget

Micro USB power input to two ATTiny MCU’s. There are two different ATTinys on this board. An ATTiny84 and an ATTiny85. These MCUs are great because they can be used with no additional components.  In fact, on this board, the only additional components are some filter capacitors for the power rail and a header for the programmer interface.

I have exposed an array of copper pads for every pin. This makes it easy to add LEDs or to wire to just about any sensor.

jonmash has shared the board on OSH Park:

ATTiny-Widget

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ATTiny-Widget

BFuse: Electronic Fuse for Breadboard

bfuse02

created this solution to make breadboard prototyping safer for components:

BFuse – Electronic Fuse for Breadboard

adjustable and programmable electronic fuse especially designed for breadboards – a breadboard fuse, or BFuse

bfuse01

The trip current can be set from 50 mA to 1 A but it can measure current up to 6 A [..] It has reverse polarity protection (by P-FET), transient voltage suppressors both on its input and output and two LEDs for indication

bfuse_r1

Set current and actual current can be compared using ATTiny’s built-in comparator or sampled by the ATTiny’s ADC. Then, the microprocessor controls a P-FET switch that opens or closes the power supply
BFuse: Electronic Fuse for Breadboard

Open Source AIS Transponder

Automatic identification system (AIS) is an automatic tracking system used on ships.  Peter Antypas designed a low-power AIS transponder:

images1 Open Source AIS Transponder (Class B)

This is the first ever (that I’m aware of) attempt at creating an open source AIS transponder

Hardware:

On the hardware side, the design is based on two Silicon Labs 4463 transceiver ICs and an STM32F302CBT6 ARM Cortex M4 microcontroller. One of the SiLabs ICs acts as a transceiver, while the other IC works as a receiver only. In receiver mode, each IC tunes to a different channel. When a transmission is scheduled, the ICs swap channels if the transceiver is not listening on the next transmit channel. This configuration may be construed as a violation of the AIS specification, but it makes for a much simpler PCB layout and negates the need for a 3-position RF switch.

Software:

There are two programs that need to be installed on the flash. The bootloader and the main application.

petera650 has shared the boards on OSH Park:

RF side of AIS transponder

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Logic / digital side of AIS transponder

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Open Source AIS Transponder

EDm: OBDII CAN bus BLE dongle

MyLab-odyssey created this board tho monitor the status of your Smart electric drive EV with this RFduino CAN bus dongle and the Blynk app on your mobile phone:

images1MyLab-odyssey/EDm_BLE

 

Hardware used:

  • RFduino MCU & BLE
  • MCP2515 CAN controller
  • MCP2562 CAN transceiver + ESD diode
  • OKI 78SR DC/DC for efficiency.

MyLab-odyssey has shared the boards OSH Park:

EDm_v1.1.brd

b964b51e3009e2b4bf91240452ca7c56

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EDm: OBDII CAN bus BLE dongle

DIY Scanning tunneling microscope

MatthiasR is building a scanning tunneling microscope:

DIY Scanning tunneling microscope

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At the end of last year i started collecting information about needed system components like the vibration isolation, the tunneling current amplifier, the z-height controller, the coarse approach mechanism and so on

Here’s a video of his DIY vibration isolation system:

DIY Scanning tunneling microscope