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How to increase current from microcontroller?
The most common way to control another direct current device from a microcontroller is to use a transistor. Transistors allow you to control the flow of a high-current circuit from a low-current source.
What is microcontroller IOL?
Iol stands for current, output low. Currents are traditionally referenced as going into a pin. If the output is high, the current flows out, so it is given a negative number. In some microcontrollers the maximum sink and source current limits for a given pin might be different.
What is the bit size of the 89 c51 microcontroller?
The AT89C51 is an age old 8-bit microcontroller from the Atmel family. It works with the popular 8051 architecture and hence is used by most beginners till date.
Can a microcontroller control a high current load?
In this tutorial, you’ll learn how to control a high-current DC load such as a DC motor or an incandescent light from a microcontroller. Microcontrollers can only output a very small amount of current from their output pins. These pins are meant to send control signals, not to act as power supplies.
How to increase the I / O pins in a microcontroller?
Shift registers do wonders for increasing digital I/O pins. A serial-in, parallel-out shift register with latching will let you use 3 uC pins to control any number of digital outputs. Tri-state multiplexers like 74HC257 will greatly expand the number of input pins you can sense. I once did a board with 10 of them.
How is a transistor used to control a microcontroller?
These pins are meant to send control signals, not to act as power supplies. The most common way to control another direct current device from a microcontroller is to use a transistor. Transistors allow you to control the flow of a high-current circuit from a low-current source.
Do you need a latch chip for a microcontroller?
But you might need an additional latch chip if you want to avoid glitches on output pins during shifting. Most expansion circuits will work on just about any microcontroller, as long as you watch voltage levels, such as between 3.3 and 5 volts.