Схемы - Измерения - 9

Vladimir Oleynik

To measure a zener diode’s breakdown voltage, you need a dc voltage source whose voltage exceeds that of the zener voltage. In Figure 1, resistor R SER provides voltage drop between V IN and V ZEN . In any case, V IN should exceed V ZEN . ...

Dave Carty

Mechanical bounce often occurs while trying to measure current or resistance on experimental materials or from routine switch-contact action. It can be a problem if you are trying to preserve the bounce or noise phenomenon within the measurement ...

Susanne Nell

This Design Idea expands the capabilities of a previously published one (Reference 1). The original version featured a current transformer whose secondary winding formed part of an oscillator's tank circuit. Under normal conditions, direct ...

Raju Baddi

This Design Idea describes a two-transistor thermal probe for diagnosing circuit problems, such as hot components and thermal runaway. Although the probe does not provide an accurate temperature measurement, it acts as a quick check for potential ...

Mehmet Efe Ozbek

Piezoelectric buzzers find wide use as audible-signal generators because of their low power consumption and clear, penetrating sound. An external driver or a self-driven circuit that oscillates at the resonant frequency of the piezoelectric element ...

Carmen Parisi

Testing and measuring an IC’s or circuit’s performance with regard to power transients is a tricky task to accomplish without some specialized equipment. Not only does the input voltage source need to change in a controlled manner, but ...

Raju Baddi

This Design Idea describes a method by which you can detect and assess air or liquid fluid flow using an externally heated semiconductor diode. Airflow across the heated diode reduces its temperature, causing a variation in the diode's voltage ...

Lukasz Sliwczynski Przemyslaw Krehlik

Professional electronics designers often use peak-detector circuit sin such applications as amplitude measurement, automatic gain control, and data regeneration. You can build a simple and fast peak detector from a serial diode and a shunt ...

Carlos Barberis

If you often need a simple active load (constant-current sink), you can benefit from the simple circuit in Figure 1. The need often arises to measure the life of a battery or other power device under constant-load conditions. The easy-to-build and ...

Stephen Woodward

When applied to pharmaceuticals, the term “off-label” suggests the (frequently discovered) practical and beneficial uses for a drug that are different from the one it was originally developed for. This happens for electronic components ...