Category Archives for Labs

Failed Fuse Indicator

If the device went bang, fizzed or simply did nothing when turned on, you could assume that it has cost you a fuse (or several). If, with it still plugged in, the main circuit breaker has not cut out and … Continue reading

10. June 2019 by sam
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Magnetic Memory

Today we have lots of options for storing information electronically like SRAM, DRAM, Flash and EEPROM. Random access memories (RAM) like SRAM and DRAM store information using capacitance which makes them very fast without a lot of extra complication. But … Continue reading

10. June 2019 by sam
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NiCd Batteries Charging Strategies

Simple NiCd chargers have been around for a long time: these simply charge the battery at a low constant current. It is common to find 1-Ah AA-size cells or similar in devices such as electric pepper grinders or handheld vacuum … Continue reading

05. June 2019 by sam
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Lead-acid Batteries Charging Strategies

In the case of sealed gel lead-acid batteries as well as the so-called ‘maintenance-free’ starter batteries it is important to ensure that they are not overcharged, as otherwise they can outgas. This can lead to a loss of electrolyte, which … Continue reading

30. May 2019 by sam
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NiMH Batteries Charging Strategies

Most of what we said above for NiCd batteries goes equally well for their NiMH successors. NiMH batteries can also be charged using the delta-V method, although the voltage drop is less significant, especially at lower charging currents. For this … Continue reading

29. May 2019 by sam
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Converting a BL600 into a BL620

13. February 2019 by sam
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Advantages of the Würth Elektronik loss model

• The empirical data is based on real-time measurements, enabling accurate determination of losses for any given duty cycle. • The model works over a wide frequency range (10 kHz to 10 MHz) with high accuracy because the constants of … Continue reading

04. February 2019 by sam
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Disadvantages of the Steinmetz model

• Dependency on empirical data from the core manufacturer: manufacturer data is required to generate the core loss diagrams. Manufacturers of passive components have no control over test setups. • Low accuracy with pulse and triangular waveforms because the core … Continue reading

04. February 2019 by sam
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REDEXPERT: Simulator for Inductive Components

Many electronics designers occasionally have doubts about how to design a switching power supply. With suitable ICs now available for nearly every purpose, along with online design aids and simulators from semiconductor device manufacturers, you might think this is no … Continue reading

04. February 2019 by sam
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The Quality of Audio Connectors

The connector needs of professionals and consumers never stop evolving The manufacturers develop products that are ‘better performing and oriented towards the future’ which take account of new functions and electrical constraints, from EMC (Electro-Magnetic Compatibility) (linked to the nature … Continue reading

29. January 2019 by sam
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