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What is active pull up in TTL NAND gate?
All standard TTL devices use a two transistor "totempole" output, one transistor provides an active pull down and the other an active pull up. Only one of these transistors is on at a time and one or the other is always on. Open collector TTL devices omit the active pull up transistor so that several outputs can be "wired" together and an external resistor provides a passive pull up. The only problem with this is the risetime of a passive pullup is much longer than the risetime of an active pull up, making the circuit slower. Tristate TTL devices have the same two transistor "totempole" output as standard TTL devices, but the circuits that control these transistors are more complex allowing a "third state" in which both transistors are turned off, leaving the output of the device floating. This allows many tristate TTL devices to be connected to a single line with only one actually driving it at a time (preventing conflicts with one device pulling up and another pulling down).
Why you use pull up resister at port-0 in 89c51?
Only port 0 needs pull-up resistors to be connected externally if you want to use it as out put port, because it has no in built pull up circuit so it can't give +5v as out put. refer micro controller and applications book by mahmed ali mazidi.
What is a circuit that lights up even if one bulb is out?
A parallel circuit lights up even when one bulb is out.
Why does an electrical breaker trip when you use a lot of appliances in the house?
since circuit breaker consists of coils they get heated up when high current flows, when this happens the coil get energised and pull the moving contacts to open thus the circuit breaker opens when high current flows.
How many outlets are there?
Up to 12 on a 20 amp circuit. Up to 9 on a 15 amp circuit. But use common sense. If the circuit will be heavily loaded, as in a home office, then do not install that many.
What is active pull up in TTL NAND gate?
All standard TTL devices use a two transistor "totempole" output, one transistor provides an active pull down and the other an active pull up. Only one of these transistors is on at a time and one or the other is always on. Open collector TTL devices omit the active pull up transistor so that several outputs can be "wired" together and an external resistor provides a passive pull up. The only problem with this is the risetime of a passive pullup is much longer than the risetime of an active pull up, making the circuit slower. Tristate TTL devices have the same two transistor "totempole" output as standard TTL devices, but the circuits that control these transistors are more complex allowing a "third state" in which both transistors are turned off, leaving the output of the device floating. This allows many tristate TTL devices to be connected to a single line with only one actually driving it at a time (preventing conflicts with one device pulling up and another pulling down).
What is a circuit parameter?
Circuit parameters can be classified as:1-- Active or Passive2-- Linnear or Non-linnear3-- Unilateral or Bilateral4-- Lumped or Distributive1-- Active or Passive:Those circuit elements that supply energy to an energised circuit are called active circit elements. Eg.: Voltage source, current source,etc.Note: It is important to note that dependent sources cannot be placed under this category as they depend on the value of current or voltage in any other branch of the network.Passive circuit elements, on the other hand, are those elements that use up the energy supplied by the active sources and\or do not supply their own energy to the circuit.Eg.: Resistor, capacitor, inductor, etc.Note: It is important to note that a capacitor does store energy and also supplies it back to the circuit but this energy is not of its own, instead it's the energy supplied by some active component. Hence, it cannot be placed under the category of active circuit parameters.Thus an energised network(or a circuit) consists of both active and passive elements.2--
Why a pull up resistor is so called?
A pull up resistor is often used in an open-collector circuit, where there is a transistor that can pull to down ground, but there is no transistor to pull up to Vcc. When the transistor is off, the pull-up resistor "pulls-up" the voltage to a point where any connected circuit "sees" the voltage and "knows" the transistor is off. This is often used in circuits where many output gates can drive a single line. Any one gate can pull the line low, while all gates have to be off to allow the line to pull high. In the alternate configuration, a totem-pole system, there are two transistors, one to pull low and one to pull high. If you have multiple gates on a common line, you must three state (turn off both transistors) on the non driving gates, or there will be conflict between gates and possible damage.
Why you use pull up resister at port-0 in 89c51?
Only port 0 needs pull-up resistors to be connected externally if you want to use it as out put port, because it has no in built pull up circuit so it can't give +5v as out put. refer micro controller and applications book by mahmed ali mazidi.
How do you reset an outside 240V AC condenser breaker box with a black plastic T handle marked ON OFF?
This is pullout disconnect switch. Pull out on the "T" handle to disconnect the circuit. If the word ON is right side up and reinserted the circuit is made. If the work OFF is right side up and reinserted the circuit is off. Some disconnects are fused, they have two cartridge fuses under the cover beneath the pull out. These may need to be replaced if power is not reestablished.
Can a series circuit work if the bulbs are differently lighted up?
The meaning of "differently lighted up" is very unclear. As long as all the bulbs in a series circuit are connected to the circuit, and all of the bulbs have good filaments with no holes in them, current will flow in the circuit. Depending on the ratings of each bulb, the current may not be enough to cause all of them to glow visibly, but there will certainly be a current. That may or may not suit your definition of "work".
What will happen if a thick copper wire is used in fuse?
If a thick copper wire is used in a fuse then by definition of a fuse this device would no longer be defined as a fuse. A fuse in a circuit is used to protect the conductors feeding the load of that circuit. The circuit, if using a thick copper wire in a fuse, would then be considered as a non fused circuit.
Why pullup registers in 8051?
Only port 0 needs pull-up resistors to be connected externally if you want to use it as out put port, because it has no in built pull up circuit so it can't give +5v as out put. refer micro controller and applications book by mahmed ali mazidi.
How do you use the redstone lamp in minecraft?
A Redstone Lamp lights up when it is charged. Charged can be supplied by an adjacent button, lever, pressure plate, etc, or as part of an active Redstone Circuit.
How the circuit behave if there was open circuit?
It wouldn't light up.
Is lifting a book a push or a pull?
I suppose a pull as you pull it up not push it up and from then on it's carrying.
Is pick up proteins active or passive?
"Pick Up" Proteins Is Active Transort!
