The LTM®4600 is a complete 10A switchmode step-down power supply with a built-in inductor, supporting power components and compensation circuitry. With high integration and synchronous current mode operation, this DC/DC µModuleTM delivers high power at high efficiency in a tiny and low profile surface mount package. Supported by Linear Technology’s rigorous testing and high reliability processes, the LTM4600 simplifies the design and layout of your next power supply.
- 15mm x 15mm x 2.8mm LGA with 15°C/W θJA
- Pb-Free (e4), RoHS Compliant
- Only CBULK Required
- Standard and High Voltage:
* LTM4600EV: 4.5V<=VIN<=20V
* LTM4600HVEV: 4.5V<=VIN<=28V
- IOUT: 10A DC, 14A Peak
- Parallel Two µModules for 20A Output
LTM4600 – 10A switchmode step-down power supply with a built-in inductor - [Link]
DOG series will start with 3 types: 1×8 character, 2×16 and 3×16 character. Outline dimensions are very compact with 55x27mm and especially designed for handheld applications and low power applications. Thanks to the most modern Chip-On-Glas technology (STN and FSTN) overall height is 2.0mm only. Even together with LED backlight thickness will increase to 5.8mm only. Operating temperature range of –20..+70°C (temperature compensated) is standard.
Standard character height of 5.57 mm for the 2×16 makes „DOG modules“ easy readable. User can decide for 3 different interface 4-Bit, 8-Bit and SPI. No need to say that character set with full 248 ASCII characters is installed. Because of direct placement onto pcb production and mounting cost are unequaled low. No special mounting is required.
Combining various display technologies (positive/negative, blue/green/black) with different backlights (white, blue, amber, yellow/green, red) gives the advantage of many different design looks.
Real 3.3V Displays - [Link]
Last week I was browsing my old backup hard drive and I found a source code for a very simple PIC based digital timer that I made a couple of years ago. The actual hardware of the project isn’t with me anymore. I might have lost it when I moved from my old apartment into my new home. However, I thought this might be a good practice project for beginners and so I am sharing it here. I am not going to build it from scratch again; I will rather demonstrate it using my DIY PIC16F628A breadboard module and I/O board. The complete circuit diagram along with the firmware developed using mikroC Pro for PIC compiler is provided in the article.
00 to 99 minute timer using PIC16F628A microcontroller - [Link]
Ever want to design your own soldering station? Sqkybeaver is workshopping a soldering station driver board in the forum now. [via]
DIY soldering station - [Link]
Two exciting updates from element14 this week:
- New 2012 Catalog: Now available in a new customizable online format, a version enabled for iPads, as well as the ever-popular print edition. element14 users can now create their own unique catalog tailored to their needs, as well as opt to bookmark, email or print a specific page. element14 is the first electronics distributor to have a customizable catalog – check it out at: http://www.newark.com/ecats
- Innovators of Tomorrow: element14 recently kicked-off a new discussion series inviting the community to share thoughts on the innovators of tomorrow – who is the next Steve Jobs – as well as emerging technologies and trends. The community feedback will help fuel element14’s future Innovation series. Your readers can learn more at www.element14.com/innovators
element14 unveils first customizable catalog - [Link]
Paul Dietz, William Yerazunis, Darren Leigh write:
A novel microprocessor interface circuit is described which can alternately emit and detect light using only an LED, two digital I/O pins and a single current limiting resistor. This technique is first applied to create a smart illumination system that uses a single LED as both light source and sensor. We then present several devices that use an LED as a generic wireless serial data port. An important implication of this work is that every LED connected to a microprocessor can be thought of as a wireless two-way communication port. We present this technology as a solution to the “last centimeter problem”, because it permits disparate devices to communicate with each other simply and cheaply with minimal design modification.
LEDComm: Bidirectional Communications using LEDs - [Link]
DrawSCH is able to create schematics online for free,You don’t need to install the software. Just open your browser.
- You can share your schematics with your firends or on forums or BBS
- You can export your schematics as png or as jpg image, Pdf will be supported latter.
- You can ask someone to help you to modify your schematics
- Try it ,you will find it very useful
- Browser Support: Firefox, Chrome, Safari, Opera, IE9, IE6, IE7, IE8
Draw schematics online - [Link]
Since I’m planning to build two bench power supplies, I needed to build a current load to test them. So, I’m going to show you my version of the dummy load. Please note that this project was built ONLY using existing parts in my personal stock. I had to be silly to put this project on a wood box, but it was the only box I found around. I don’t recommend you to do it, instead use plastic or metal cases. I wanted to build something simple but with a minimum protection circuit. Thus I added a control circuit to limit the maximum dissipation power to protect the main transistor.
The main specifications are as follows:
- Current regulation: 0 to 10A
- Maximum input voltage: 40V
- Maximum dissipation power: 100W (limiting circuit with warning LED)
- Analog control: 10 turn potentiometer
- Analog display: 10A ammeter
- External power: 12V/0.3A
- Enable/disable switch
- Fuse protected: 15A
Constant Current Dummy Load - [Link]
New superfast and at the same time efficient diodes Diotec ES1x series enable to further decrease power losses even in very quick circuits.
When using diodes in power circuits working at high frequencies – like switch-mode power supplies, except forward losses also switching losses appear. Switching losses are directly commensurable to the working frequency and for the usual diodes (1N400x) these losses are unacceptably high already from frequencies of few kHz. As it is known, switching losses are caused by the fact, that to bring a diode to a reverse (unconducting) status, it is necessary to remove a charge stored in the PN junction. At the same time, to the switching losses also an energy stored in a parasitic inductance of a diode and diode leads contributes. Amount of switching losses is mainly affected by a parameter trr – reverse recovery time, that´s why for usage at higher frequencies, the types with the shortest possible trr are suitable. Read the rest of this entry »
Graphic solutions from 4D Systems are the proof, that a powerful graphic interface doesn´t have to mean big expenses and a long development time. So, give your applications the 4-th dimension!
Australian company 4D Systems, whose products we added into our offer, specialises in graphic solutions, which are very user-friendly and require a relatively small developing effort in order to reach very decent results.
Basis of 4D Systems graphic solutions represent two powerful chips – Goldelox and Picaso. Chips contain graphic processor, memory and interface for common LCD and OLED displays, and – depending on the type – also a support for a touch panel. Graphic chips and modules with these chips represent a powerful and user friendly platform for creation of graphic interface to a wide range of devices.
A common feature of both chips is, that they can be reconfigured into a slave graphic chip mode with a serial interface – SGC (slave graphics controller) – – for a work with the host microcontroller, or into a stand-alone graphic processor mode – GFX (stand alone host graphics controller). It is possible to change these chip features anytime by a simple reloading of free configuration file.
Goldelox – is a low cost chip supporting a powerful graphics, text, pictures, animations, macros and other. It can be used with a simple serial interface for a work with a microcontroller (SGC version) or as a stand-alone graphic processor (GFX version). It can work with many usual series „80“ LCD and OLED displays, with 8 bit interface. Chip can generate a sound, supports SD cards through SPI interface and many other. Read the rest of this entry »