This Instructable will demonstrate the building of a bare bones (and really inexpensive… less than $5) Arduino compatible module that can be put together on a small piece of stripboard and can be used either on a breadboard or independently.
YABBAS – Yet Another Bare Bones Arduino (on Stripboard) - [Link]
steveastrouk @ instructables.com writes:
This is useful tip for anyone making or using surface mount components on PCBs. It relies on access to a laser cutter, so if you don’t have one, look away now….. I cut a plastic stencil on the laser, align it with the PCB pads and then squeegee a thin layer of solder paste through the holes. Peeling away the stencil will leave a perfect pattern of pads with the correct amount of solder on each one. I have just successfully used this process on components with a 0.025″ pitch (0.65mm) – that’s VERY small,
Soldering stencils for DIY circuit boards - [Link]
T.K. Hareendran writes:
All items stored in a deep freezer will thaw out if, for some reason, the temperature inside the freezer rises to the thaw point. However, a freezer monitor alarm can warn you of the rising temperature before the thaw point is reached.
This simple circuit is powered by regulated 9V and built around a few discrete components that are readily available in the market. Current consumption of the circuit is only a few milliamperes in idle state. So you can also use a 9V 6F22/PP3 type compact battery for powering the circuit.
Freezer Monitor Alarm - [Link]
machinegeek @ dangerousprototypes.com writes:
panStamps are small open source wireless modules designed to add RF connectivity to sensors, MCUs and similar projects. The crew at panStamp is in the process of developing a new module based on the TI CC430F5137 SOC. Programming will be via the Arduino IDE, facilitated through a port being developed by the open source Energia project.Commercial release of this new line of panStamps is planned for September-October. For more info visit PanStamp.
panStamp developing MSP430 based module - [Link]
Arduino quadcopter iPhone control:
This Arduino Quadcopter by Kyle Fieldus has iPhone Control, similar to the AR Drone you can tilt the phone to control the quadcopter. Touch OSC is being used to design the phone interface, there is also an Android version available. The system chain is a bit complex since the phone is sending the input data to the computer, the computer determines what should be done on the quadcopter and sends these commands to a computer tethered Arduino via USB. The computer tethered Arduino finally sends the commands to the quadcopter mounted Arduino via Xbee. All of the code and instructions will be made available as soon as this University project has been handed in and graded. You can see the first video here that was taken when the Xbee link between the two Arduinos was tested.
Arduino quadcopter iPhone control - [Link]
Inside the worlds first Digital SLR camera with rear LCD and inbuilt JPEG processing, the 1998 vintage Kodak DCS315, based on the Nikon Pronea 6i film SLR camera body.
This was before Canon and Nikon had released their own DSLR camera technology, when Kodak ruled the digital camera world!
EEVblog #495 – Kodak DCS315 DSLR Teardown - [Link]
Kevin Rye has been working on his GPS clock project and wrote a detailed explanation on his blog describing the build:
The great thing about setting the time and date via GPS is that I won’t have to put any buttons on the clock. It’ll set itself, and appear to be completely autonomous. By removing the buttons needed for entering menus and setting the time and date, I can hopefully make the clock that much smaller. Ideally, I don’t want it to be any bigger than the display itself. In addition, shaving a half inch or so off the PCB should save a few bucks when it comes to getting the PCB made.
GPS clock prototyping - [Link]
I’ve been an electronics hobbyist for many years, so I’ve used and even built my share of resistance decade boxes. Each one consisted of rotary switches with labels identifying a different power of 10 for each switch. You “dialed up” the desired resistance by turning the appropriate knobs to add up to the target resistance value.
Well, I’m also a computer geek, so I got the crazy idea to build a decade box using DIP switches (instead of rotary switches) and binary values (instead of decimal values). Each switch represents a power of 2 and the resulting resistance equals the combined value of the “ON” switches.
Binary Resistance Decade Box - [Link]
Semtech has launched the SX1272, the first product in a new family of long-range Radio Frequency Integrated Circuits (RFICs) with a transmission range up to 15 kilometers. The SX1272 integrates Semtech’s new LoRa (long range) modulation technology to enable drastic range improvements over alternative modulation methods. Compared to a typical range of 1 to 2 kilometers with smart meter transceivers using FSK modulation, the new device can transmit over more than 15 km, operating under the same conditions and regulatory limits.
The new RFIC achieves receiver sensitivity up to -137 dBm using a low-cost crystal, compared to current state-of-the-art FSK devices with a sensitivity of -115 dBm with a comparable crystal or -125 dBm using an expensive temperature controlled crystal oscillator (TCXO). The in-band interference signal rejection is also 25 dB better than FSK devices. This makes the device especially effective in ISM band applications because it provides immunity from sub-GHz 4G/LTE signals. [via]
Smart Meter Transceiver IC has Range of 15 km - [Link]
Double PCB terminal blocks of the PDSV series from company Euroclamp enable to better utilize a space and to connect more leads on a small area.
If we need to connect several leads on one side of a PCB and we can´t or don´t want to use terminal blocks with a smaller pitch, then the PDSV double plug-in terminal blocks are the ideal solution. In principle, these are “pin headers”, which can be mated with several types of SF and SV series connectors. It gives a variability of connection and a possibility to find at any circumstances the right type for a comfortable connection of conductors.
From several available versions we incorporated into our stable stock offer 2 vertical types – PDSV02-5,08-V (2-pole) and PDSV03-5,08-V (3-pole), both with a 5,08mm pitch (0,2“). PDSV series is modular, i.e. it is possible to stack them into a practically arbitrarily long configuration. These pin-headers mate with SF02-5,08-P/ SF03-5,08-P, SV02-5,08-F / SV03-5,08-F or SV02-5,08-P/ SV03-5,08-P terminal blocks. Body of the terminal block is made of PA (polyamide) UL94-V0 class, contact is from a nickel-plated copper alloy and a screw is form a galvanized steel. Detailed information will provide you datasheets at particular types.
Double terminal blocks PDSV … 2×2 can be more than 4 – [Link]