So you can't post a constant voltage for more than a very short time, and so it's mostly useless for control applications.
42.
Many lab DC power supplies are constant voltage ( to 2 s . f . ), but some LED power supplies attempt constant current ."
43.
A Zener diode, when reverse biased ( as shown in the circuit ) has a constant voltage drop across it irrespective of the current flowing through it.
44.
A second method is the constant voltage measurement, where the driver is excited by a constant voltage, and the current passing through the coil is measured.
45.
A second method is the constant voltage measurement, where the driver is excited by a constant voltage, and the current passing through the coil is measured.
46.
Then one transistor turns on, a constant voltage is applied to the primary, current increases linearly, and a constant voltage is induced in the secondary.
47.
Then one transistor turns on, a constant voltage is applied to the primary, current increases linearly, and a constant voltage is induced in the secondary.
48.
The same goes for using the keyboard LED's and the speaker : they can't output a constant voltage for an arbitrary amount of time.
49.
The circuit behaves as a short connection and a virtual ground appears at the input; so, it should not be driven by a constant voltage source.
50.
A constant voltage, direct current power source is most commonly used with GMAW, but constant current systems, as well as alternating current, can be used.
