Jac Hettema (10)

| 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...

| 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...

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

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

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

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

| 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...

| 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...

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

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