Direct current (DC) motors and step motors are included in the category of components consisting of coils. Thus, basically, the test of these components is summarized in the tests of continuity and short between the turns of their coils. More information on component testing can be found in the author's series "How to Test Components" (*)
Power-induced signals, transmitter signals of any power, static charges, transients and other signals of unknown origin can be detected by this highly sensitive CMOS circuit. Totally gateable, it can be taken anywhere and its low consumption allows the batteries to have their durability extended for several months. With this detector we can identify sources of electromagnetic interference that may be affecting the operation of industrial or even common use devices.
Our assembly is a very useful test device, especially for readers who work setting up and repairing audio devices. It is an audio generator which produces three waveforms: rectangular, triangular and sinusoidal, a true generator of functions capable of covering the range that goes from 20 Hz to 200 000 Hz.
This is a different signal injector, as it does not need to connect to the analyzed circuit. What it does is to inject a signal into components that have coils and that is why they can pick up signals through a magnetic field. Simple to assemble, it can be very useful in the assembler's and electronic repairman’s workbench.
We describe the assembly of a very useful instrument for your workbench that is used to detect the presence of audio and radio frequency signals in your designs or in which you have to repair radios.
IGBTs are widely used in frequency inverters, power controllers, switched sources and DC/DC converters. These components have hybrid features, with an isolated gate as a MOSFET and junctions between the collector and emitter as a bipolar transistor.
We found this circuit in an English publication of 1976. It can be easily assembled by changing the...
This circuit is suggested by Texas Instruments in its Linear Circuits Applications. It is a...
The different aspect of this source is the use of a 12 V lamp as a current regulator together with a...
This regulated power supply can provide currents up to 1 A to a load. The transformer may actually have...
The power source shown for powering for small TTL circuits was found on a Radio Electronics...
IGBTs are widely used in frequency inverters, power controllers, switched sources and DC/DC...
This oscillator can run in frequencies up 10 MHz depending on the Power supply voltage. The 1 µF...
This one-digit counter is part f the samples bench of the MultiSIM in one of its versions. The...