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New types of insulating tapes feature very good insulation properties, resistance, excellent adhesion and last but not least also a very convenient price.
In our product range can be found new types of insulating and other technical tapes of Electrix brand. In order to give you an easy orientation in them, we bring you their short description:
Type 202
Professional highly elastic insulating tape from a plastified PVC, 0.19 mm thick with up to 49 kV/mm isolation strength. Resistant to moisture and dissolvents. Binder of the tape is based on the synthetic rubber and features an excellent adhesion. Applicable at -10 to + 85°C. The tape is 15mm wide and 20 m long.
Type 211
Universal insulating tape from a plastified PVC, 0.13 mm thick. Resistant to moisture and dissolvents. Binder of the tape is based on the synthetic rubber and features an excellent adhesion. The tape is available in 5 widths, from 15 to 50 mm. In stock we keep the 15 mm wide and 10 m long type.
Type 223
Self-vulcanizing water-resistant PIB based insulating tape, 0.76mm thick. Quickly vulcanizes and features up to 13,8 kV/mm isolation strength. Maximum dilatation is up to 600%. The tape is also ideal for insulation of thin cables in a wide temperature range from -30 to +80°C. It is available in 4 widths, from 19 to 50 mm. In stock we keep the 19 mm wide and 3.5 m long type.
Type 111
Universal grey textile tape for binding of materials, insulations, sealing and fastening. Water-resistant and well adapting to uneven surface. The tape is usable up to +90 °C, strong, with an immediate adhesion. Thanks to a textile reinforcement, it is applicable even without cutting tools (the tape can be torn in a perpendicular direction). Available in 25, 35 and 50 mm widths. In stock we keep the 50 mm wide and 9 m long type.
Type 302
Aluminium self-adhesion tape with a binder based on a modified rubber. Suitable for sealing, masking and assembly of insulations, in the air-conditioning and heating appliances. The tape has a high mechanical resistance, excellent adhesion and doesn´t peel off at low temperatures. A relatively soft aluminium foil easily adapts to uneven surface. Also acts as a good moisture barrier. Available in 5 widths, from 30 to 100 mm. In stock we keep the 48 mm wide and 10 m long type.
Type 511
Double-sided foam tape. Universally usable for installation of various components. With a 1mm thickness, it easily adopts to uneven surface. In stock we keep the 25 mm wide and 5 m long type.
Type 521
Thin double-sided tape. Universally usable on various for various materials and also for example at a production process – for a temporal fixing of a component for an easy subsequent application of a glue or sealant.
Insulate it thoroughly! - [Link]
Very cheap low-speed dual channel PC/USB oscilloscope with STM32 (STM32F103C8T6) microcontroller
Miniscope v2c is a very simple USB interface for low-speed oscilloscope/recorder capable with continuous sampling and streaming to PC at 2×300 kSps speed. It is stripped down from switchable analog amplifier that version v2b had, but it is using small single-side PCB that would be easy to make with toner transfer method and parts should cost less than $10 total.
Miniscope v2c – Cheap low-speed dual channel USB oscilloscope with STM32 - [Link]
New display embedded modules BEGV64x from company Bolymin enable to add to your application a graphic output with and a control unit together with a communication interface – all integrated into a single module.
Based on the ATMega644P AVR processor, provide BEGV643 and BEGV641 a relatively high performance at a low power consumption. Used AVR processor provides a higher power than necessary to control the display and module peripherials, that´s why you have a considerable amount of CPU power/ system resources freely available according to your application demands.
Modules contain 1x RS232, one isolated RS485/422/232 port and a high speed SPI/I2C interface. In comparison to development from single components, when using these modules, it is eliminated the need for design of schematics and PCB of a control unit, display unit and a communication interface, power supply part as well as a necessary software. With a built-in in-system programmable 64kB Flash and 4kB SRAM, they provide a decent memory space even for relatively large applications. Another memory space is provided by external 2x 64 kB I2C CMOS EEPROM. Monochrome STN LCD displays with a white backlight provide a very good legibility. BEGV643 has the 320×240 px display resolution and BEGV641 has 240×128 px.
Modules are available in few versions of communication interfaces, detailed information will provide you BEGV643 / BEGV641 flyers and BEGV643 a BEGV641 user manuals. On the page 61/62 of user manuals you can also find links to download software utilities for display and communication interfaces. For a development support there is also available the BEGV643AMGI board with ISP and RS232 connectors.
Bolymin BEGV have a sufficient power to control your applications - [Link]
Menno posts several alternatives to using pin headers for programming microcontrollers. Most use spring loaded pogo-pins make contact with the programming signal pads. Check out more pictures on his Flickr page. [via]
Alternatives to programming through a pin header - [Link]
New Weller WX 2 Soldering Station - [Link]
Monitoring your Air Quality. Chris writes – [via]
With allergies and asthma I’m interested in both the indoor and outdoor air quality. I heat with a Quadrafire woodstove. It is suppose to be a clean stove. I was interested in the impact on both my inside air (ie. ash/dust) and outside air (smoke). New York State monitors the air quality at several locations around the State. Certified Allergy & Asthma Consultants in Albany NY published daily pollen counts. I have several weatherstations collecting data ( KNYREXFO1 [barn roof], KNYCLIFT1 [garage roof]),
There are several citizen group projects that are developing open source equipment (e.g. Air Quality Egg). There are several recent discussions about adding a Particulate sensor. The Egg Project aims to give citizens a way to participate in the conversation about air quality. It is composed of a sensing device that measures the air quality in the immediate environment and an on-line community that is sharing this information in real-time. It is a community-developed, open source project that is driven by people who care about the air they breathe.
The $290 DC1100 Pro Air Quality is a true Laser Particle Counter with two different size ranges. The small channel (0.5> Micron) should see bacteria and mold. The Large channel (2.5> micron) should see dust and pollen. The LCD display constantly shows bargraphs and values for the small and large particles. The unit saves 30 days of air quality data. I ordered the unit with the PC Interface Option and connected it to an Arduino Ethernet so I can automatically log the data to Pachube. That way air quality alerts can be triggered and sent to twitter and my cell phone.
Monitoring your Air Quality – Automatically measuring and graphing Air Quality - [Link]
Le Hung writes:
LCFesR 4.0 unit is a precise, wide range LC / LCF / LCR / ESR meter (tester / checker) that measures inductance (L), capacity (C), frequency (F), small resistance (R) and equivalent series resistance (ESR) of a capacitor inside an electronic circuit (in-circuit). The meter can be built easily with one- or double-sided PCB and available electronic components (DIY). It’s functions are base on an further developed AVR ATMega88PA-PU microprocessor. Professional KIT is also available.
LCFesR 4.0 meter – LC / LCF / LCR / ESR meter - [Link]
The Atmel® SAM3 family of ARM® Cortex™-M3 Flash-based microcontrollers (MCU) is expanding with 40 new devices in the mix that provide more memory options and more connectivity. With this high-performance, highly integrated and power-efficient portfolio, you’ll find just the right devices to meet your unique design requirements.
SAM3 family
A powerful new family of microcontrollers from Atmel with Cortex™ M3 cores (rev 2.0). The new microcontrollers are energy efficient and the supply voltages range from 1.62 to 3.6 V. They are designed to make circuit board layouts simpler and keep system costs low. The circuits have a broad selection of interfaces and support Atmel’s touch control system, QTouch.
SAM3N – (Entry point) Entry-level model to ARM Cortex M3 technology with a 3-layer bus (AHB), 10 DMA channels and clock frequencies up to 48 MHz. UART, SPI and I2C interfaces. Pin-to-pin compatible with the SAM7S and SAM3S series. Up to 79 I/Os, 48-/64-/100-pin packages.
SAM3S – (General purpose) Mid-range model with a 4-layer bus, 21 DMA channels and clock frequencies up to 64 MHz. Full-speed (FS) USB, high-speed SD/SDIO/MMC plus USART and SPI. Pin-to-pin compatible with SAM7S. Up to 79 I/Os, 48-/64-/100-pin packages.
SAM3U – (High-speed) Fast 100 Mbps microcontroller for more advanced applications with complex communications. 5-layer bus, 22 DMA channels and clock frequencies up to 96 MHz. 480 Mbps high-speed USB, high-speed SD/SDIO/MMC plus USART and SPI. Up to 96 I/Os, 100-/144-pin packages.
SAM3 family – NEW 32-bit ARM Microcontroller - [Link]
This is a simple use of internal ADC of AVR atmega8. Voltage is measured directly with help of resistor divider and amperes is calculated based on the voltage drop in a low resistance power resistor.
Atmega8 based Volt – Ampere meter - [Link]
Isolated offline-flyback controller LT3799 enables to create a powerful LED driver with a minimum of external components, which is moreover compatible with common triac dimmers.
At the design of a new LED driver, we usually have to consider more factors like for example an output current stability, shortcut or open LED protection, efficiency, safety (isolated secondary circuit form the primary one), power factor correction, EMI, number of external components and other.
LT3799 meets all these requirements and offers another benefits, like for example a possibility to use a smaller transformer thanks to the use of critical conductivity mode, powerful external MOSFET driver, internal LDO regulator and also a very good output current regulation – typically +-5%, moreover with no opto-isolator. A big bonus is the active power factor correction, thanks to which it reaches typical values of 0,96 (at 230V AC), thus meeting the most stringent requirements in this field, as well as IEC 61000-3-2 class C about harmonic currents emission. When we look closer at the recommended application circuit, we´ll find out that behind a diode bridge we won´t find any (otherwise common) input electrolytic capacitor with value of tens or hundreds of uF. That´s why the input voltage of the controller and a of the power transformer “copies” input sinusoid. Excellent power factor is reached just thanks to it, that LT3799 knows immediate input voltage value and based on this value, it sets the input current limit (in a given cycle of the SMPS), proportionally to the immediate value of the input AC voltage. Further LT3799 gains information about the immediate current from the primary side, that´s why it doesn´t require an opto-coupler. Thanks to this, LT3799 works like a current source in every period of input voltage, that´s why it is even possible to use classic triac regulators, which are often already a part of the buildings installation. In other words – LT3799 doesn´t try to compensate “dropouts” in power supply caused by a phase control of a triac, what causes decreasing of an output LED current and their fluent dimming. Neither this control method doesn´t cause LED blinking, because there is an electrolytic capacitor on the transformer output.
Detailed information you can find in the LT3799 datasheet and in the Design Note 490. For the development support is also available the LT3799 demo board DC1595A.
LT3799 – create a LED driver with an active PFC - [Link]
