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Tibbit #00_3: Two Direct I/O Lines, +5V Power, Ground, M1S US$2.00

Tibbit #00_3: Two Direct I/O Lines, +5V Power, Ground, M1S

This is a Tibbit module part of the Tibbo Project System that allows you to build your own custom embedded device with only the components you need. Start with a Tibbo Project PCB, add Tibbits like this one, then place the built design into a Tibbo Project Box to complete your product.

Tibbit #00_3: Two directly exposed I/O lines of the microcontroller plus the +5V output and ground lines.

The picture to the right shows a different Tibbit, but the size, color and shape are the same.

As with Tibbits #00-1 (pictured at right) and #00-2, this Tibbit allows you to work with CPU I/O lines directly. The only difference is that one of the lines is replaced by +5V power and another is the ground (GND) line. This leaves you with only two CPU lines, but in many cases that is sufficient.

The GND and +5V lines may be necessary when using this Tibbit with C Tibbit #21 (four terminal blocks). That Tibbit doesn't have its own dedicated Ground or Power, so if those are necessary, they must come from the neighboring M device, such as this Tibbit.

Another use for this Tibbit is with C Tibbits that implement various sensors, such as:

Those Tibbits use I2C interface to talk to the main CPU. I2C only requires two CPU lines. The remaining two lines are Ground and +5V power.

Note that a CPU I/O line has the voltage swing from 0-3.3V when the line is enabled (io.enabled= 1- YES). The voltage may be close to 5V when the line is disabled (io.enabled= 0- NO). This is because the CPU has weak pull-up resistors connected to 5V.

Two yellow LEDs are connected to two control lines of the CPU (through buffering gates). These LEDs light up for the LOW state of control lines.

M1S Tibbit Modules Overview

M1S Tibbits are single-width modules occupying one standard M socket on a Tibbo Project PCB (i.e. TPP2 or TPP3). Their footprint is roughly 7 14 "squares" (one "square" is 2.54 2.54 mm). The M1S modules are 12.5mm high.

M1 modules have two rows of 6 pins:

Pins 8-11 are control lines A-D. They provide the interface to programmable modules or other microcontrollers. On Tibbo Project PCBs, these pins are connected to the main processor.

Pins 2-5 are I/O lines facing the outside world. On Tibbo Project PCBs, they go to C Tibbits.

Pins 6 and 12 are the GROUND and +5V power pins. Most Tibbit Modules consume (take) 5V power. There are also power supply Tibbits that generate 5V power from a variety of sources. Those output 5V through pin 12.

Pins 1 and 7 are for the additional +15V and -15V voltages. These are optional and only needed by few Tibbits. A special power supply Tibbit (#12) generates 15V from the main 5V power.

This product was added to our catalog on Tuesday 15 October, 2013.


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