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 #40_3: Digital potentiometer, 50KOhm, 8-bit resolution.
This Tibbit has an MCP4561 digital potentiometer IC from Microchip. This IC has an 8-bit resolution. Refer to the Microchip MCP4561 Page for a datasheet and other documentation related to the operation of this IC.
There are four variations of Tibbit #40, with different potentiometer settings. This one is at 50kΩ. The picture to the right shows the 5KΩ version.
There is one red LED and one yellow LED. The red LED is connected to the SCL line of the I2C interface; the yellow LED is connected to the SDA line.
- Form: M1S
- Power: 5V consumes 10mA
- Mates with: #19, #20, #21 (limited use)
Sample Project The use of this and other I2C/SPI Tibbits is illustrated by a group of Tibbo BASIC test projects.
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.