Jac Hettema (10)

1-08-2023 | Active speakers have their own power supplies and deliver high-quality sound. Their downside is that you need to turn them on to listen to t...

1-03-2019 | In circuits that dissipate a lot of power, active cooling is generally the only solution. In other words: with a fan. To prevent wear and, m...

1-11-2018 | Many active crossover filters have been published over the years and almost without exception they contain many, and often expensive, compon...

1-07-2012 | This system is designed to facilitate the determination of loudspeaker resonant frequencies. What components do you need for this? A good va...

1-07-2011 | This high voltage generator was designed with the aim of testing the electrical breakdown protection used on the railways. These protection...

1-07-2011 | Occasionally you come across some unusual situations when setting up measurement systems. The author once had to set up a system to register...

1-07-2011 | This regulator was designed for use with a generator with a higher output voltage. This type of generator can be found on some boats and on...

1-07-2011 | This design resulted from the need for a partial replacement of the well-known 8038 chip, which is no longer in production and therefore har...

1-07-2010 | A zapper is a device that is often used in alternative medicine. This device is a so-called electronic bioresonance pulse generator, which g...

1-07-2010 | This circuit was designed to ensure that an amplifier circuit containing a TDA1516Q would not exceed its maximum supply voltage when the loa...