The smart lamp is a desk lamp apparently not different from the others that are located in the offices, near the PC...
The smart lamp is a desk lamp apparently not different from the others that are located in the offices, near the PC monitor. However, it allows you to do one more thing: adjust the indoor thermal comfort by interacting directly with the PdC optimizing power consumption. For its construction we have used some pieces taken from a broken lamp. The remaining parts are appropriately designed to accommodate the various components and realized through the aid of a 3D printer.
In Part 1 of this series, we demonstrated how to send signals using simple Infrared PWM on Arduino. In this Part 2 post we look at sending RAW IR signals.
...specifically a RAW NEC signal and a longer RAW Mitsubishi Air Conditioner signal. We have also improved the method shown in Part 1 due to some issues we identified when sending ‘real’ signals versus the ‘test’ signal we used before. (More on that later). In Part 3, we will take the signals from this post and show how to send them using their binary (or Hex) representation, which saves lots of SRAM. Free source code is also provided.
To complement our AnalysIR project we are making this starter kit of IR components available as a single order.
We created this component kit as part of our original crowd-funding campaign to help makers get started with decoding IR remote control signals using quality IR components along with AnalysIR and an Arduino or RPi. (We also provide this and other kits at a discount via our own site, but only to users of AnalysIR.). After repeated requests we have now decided to offer it via Tindie to all makers worldwide.
The kit contains IR receivers for all of the most popular carrier frequencies (36kHz, 38kHz, 40kHz and 56kHz). The included IR LED or emitter can handle low current, 100mA and even short bursts of 1Amp for longer range or laser tag type projects. Again, all quality components.
In this post, we present a sketch for Simple Infrared PWM on Arduino. This is the first part in a 3 part series of posts covering variations in this topic.
We are often asked on discussion boards, about conflicts between IRremote or IRLib and other Arduino Libraries. In this post, we present a sketch for ‘Simple Infrared PWM on Arduino’. This is the first part in a 3 part series of posts. Part 1 shows how to generate the simple Infrared carrier frequency on Arduino, using any available IO pin and without conflicting with other libraries. Part 2 will show how to send a RAW infrared signal using this approach and Part 3 will show how to send a common NEC signal from the binary or HEX value.
We reverse engineer this Mitsubishi AC Infrared protocol, an example of the more challenging AC Infrared protocols.
This post is the second in a two-part series about Reverse Engineering AC Infrared protocols. This time we look at the Mitsubishi Air Conditioner IR Protocol. Detailed information is available via GitHub which is linked below. This 288 data bit Mitsubishi AC Infrared protocol is composed of two consecutive frames. Both frames are always identical for each signal sent. In common with most AC units the complete settings are sent with every IR signal (temperature, fan, swing etc…). AnalysIR was used to record and turn the signal into HEX/Binary format from which the reverse engineering of the individual fields was tackled.
we decided to put 2 of the more common 38kHz receivers, TSOP34438 vs VS1838B, 'head-to-head'
Having helped many makers resolve problems with Infrared remote control projects over on the Arduino forum, we decided to put 2 of the more common 38kHz receivers, TSOP34438 vs VS1838B, 'head-to-head' . For more details visit:
A common question asked on forums is one about "Driving an Infrared Led directly from an Arduino pin". Often there is a debate if a resistor is required...
Although the answer may be obvious to anyone with at least a basic knowledge of Ohm’s Law, many are confused about how to choose a resistor value for optimum performance. Often, there is a debate about whether a resistor is required at all, given that the AVR pins are rated to deliver an absolute maximum of 40mA on a pin. (Note: All of the quoted specs in the data sheet are for test conditions of up to 20mA on a pin). Of course there are better ways of drive an IR LED with a transistor circuit or even a constant current circuit. However, in this post we consider only the direct drive circuit, as illustrated in the diagram down below. Make sure to read the caveats at the end of this post.
We have been updating the AnalysIR documentation for the upcoming 1.0 release and realised that AnalysIR now decodes 40 Infrared protocols. Wow!. Along with the most common TV & media remotes controls there are 14 Air Conditioner protocols included. The full set of protocols is included with the latest ‘dev’ release, which is available to all current & new owners of AnalysIR (less the aforementioned documentation) in advance of the pending 1.0 release. The 1.0 release will incorporate over 170 new features, updates and fixes compared to the initial release and also supports our new IR Learner which will be launched along with a range of Infrared kits in the coming months.
Geeky gadgets Arduino Infrared Learning Processor Board Set (video) Geeky gadgets Developers, makers and hobbyists that enjoy making projects using the Arduino platform might be interested in a new Arduino compatible infrared learning processor...
Make your own infrared receiver with two resitors, an IR Led and Arduino
Our recent post about the silver bullet IR receiver proved very popular and we promised that we would follow-up with another variant of the poor maker’s Infrared receiver. This time we are using an IR Led (emitter), 2 resistors and any standard Arduino. You will also need to download the Arduino code provided below, compile and upload it. One of the most common problems encountered when trying to decode IR signals is that makers don’t always have the appropriate IR receiver for the job in hand or have to wait for one to be delivered by mail. Here we present an affordable method to allow you to use any IR emitter (LED) as a receiver and as a bonus we are publishing the Arduino code to make it all work.
A review of timing distortions in Infrared Receivers
Many electronics enthusiasts will be familiar with how Infrared receivers demodulate IR signals. In this post we show a visualisation of the time lag and distortion of the signals as they pass through the IR receiver for demodulation and noise filtering. Most DIY projects use the raw timings from the IR receiver to decode individual signals. However, not many will be aware that IR receivers can distort the signal timings by significant amounts. Fortunately, common IR decoders take this into account and compensate for timing distortions introduced by infrared demodulators / receivers.
We have just finished porting our (single source) firmware from a range of other ‘Arduino’ type platforms to Particle’s Photon, having received it yesterday & thought it would be useful sharing some of our experiences for other ‘newbies’. The photon is one of a breed of modern IoT devices hitting the market at relatively low … Continue reading Porting AnalysIR firmware to Particle’s Photon platform →
This matchbox sized devices promises a lot for IoT!
Two of our users in France collaborated to reverse engineer one of the more challenging Panasonic AC Infrared protocols using AnalysIR.
Not only did they identify the codes & checksum but also provided some impressive documentation and full source code to help others. Detailed information is available via GitHub which is linked below. This 216 data bit Panasonic AC Infrared protocol is composed of two consecutive frames. The first frame remains constant for every command sent to the AC unit. In common with most AC units the complete configuration is sent with every IR signal (temperature, fan, swing etc…). AnalysIR was used to record and turn the signal into HEX/Binary format from which the reverse engineering of the individual fields was tackled.
Batch Infrared Decoding can speed up signal decoding for imported data sets or when changing decoding tolerances. Currently, AnalysIR supports over 40 Infrared Protocols, but you can analyse 99.99% of protocols with AnalysIR.
Having already replaced standalone cameras for many people, the smartphone also has the humble remote control in its sights. MightyRC is the latest in a line of products looking to reduce remote control clutter in the environment where they have multiplied the most over the years – the living room. It allows all appliances compatible with infrared remotes to be controlled via a single app on a smartphone or tablet.
The MightyRC system is made up of a box measuring 80 x 80 x 18 mm (3.1 x 3.1 x 0.7 in) and a companion smartphone app. Commands are entered in the app and transmitted to the box over Bluetooth 4.0, provided the smartphone is within 100 ft (30 m) range. The box then relays these commands to the various appliances using an infrared transmitter. The company claims the IR transmitter is good to a range of around 6 m (20 ft), and is so powerful that appliances won't necessarily need to be in the box's line of sight – although don't go expecting the infrared beams to travel through walls. The device also has an infrared receiver, which allows it to learn from existing remotes.
Naming each of your devices in the app will allow the MightyRC to differentiate between the them. Further to channeling the controls of these different appliances into the one interface, MightyRC also features a nifty "Activation" function. This feature allows users to program a one-touch control to activate preset functions across different devices. So you could, in theory, setup an activation called "King of Westeros" allowing you to switch on your television, switch the cable box to the correct channel, and turn on the surround sound system with just one click in time for the latest episode of Game of Thrones.
Oscilloscope infrared receiver - using a standard IR Led soldered to a BNC and plugged directly into a spare channel of the Oscilloscope as an IR receiver.
A while ago we came across a website on infrared remote controls which suggested a simple way to view IR signals using an Oscilloscope. The idea is to use a standard IR Led mounted into a BNC/RCA plug using a spare channel making an Oscilloscope infrared receiver. So we set about ordering the connectors, which arrived in the post today. Another way of looking at this device is as a ‘poor-mans’ IR receiver, but if you have an Oscilloscope to plug it into then maybe you are not so poor after all.
Since introducing support into AnalysIR for the USB IR Toy we haven’t played too much with setting the different infrared modulation frequencies. After reading some mixed experiences on the Dangerous Prototypes forum we decided to put it to the test. So to start off we implemented a feature in AnalysIR to set the modulation frequency and to default to 38kHz at start up.
Recently we have been helping several members on the Arduino forum to record and playback their remote control signals from their Air Conditioners.
..... These signals are typically much longer than those of TVs or common media devices. The 2 most popular libraries for Arduino, IRremote & IRlib are excellent, but have some limitations which we have covered in a previous post. In this post we address one particular issue that is proving challenging to users.
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