External board 48x4A¶
Changes from previous version¶
This is initial version - previous versions was only for testing purposes.
Top view¶
Bottom view¶
Features¶
- 48x4A MOSFET P
- temperature sensor (LM75 or MCP9808)
- 3 expanders (MCP23017 or PCF8575)
Scheme and PCB¶
Scheme can be found here: https://github.com/boneIO-eu/Community-boards/tree/main/boneIO%20-%20external%20board
I2C bus¶
Connection with input board is established by I2C bus available on input board.
If there are note or column according I2C bus; it applies only to newer version of Input Board ESP (>= v0.5). For all other boards there is single I2C bus
I2C bus devices¶
| Name | I2C bus* | Address |
|---|---|---|
| LM75 | i2c_b | 0x48 |
| MCP9808 | i2c_b | 0x18 |
| MCP23017 or PCF8575 (outputs) | i2c_b | 0x20 |
| MCP23017 or PCF8575 (outputs) | i2c_b | 0x21 |
| MCP23017 or PCF8575 (outputs) | i2c_b | 0x22 |
Output relays¶
The outputs are divided into 8 type 2EDGRC-5.0-07P connectors, each connector has one separate per VDD connector and six outputs such as OUT_1, OUT_2, OUT_3, OUT_4, OUT_5, OUT_6. VDD is connected only for the outputs for a particular connector. Configuration of MCP23017 or PCF8575 expander pins on the i2c_b bus :
Expander configuration¶
It is available in MCP23017 or PCF8575 expander versions. For both pins are the same and if buses are divded those are available on the i2c_b bus.
| Output | Address | MCP23017 | PCF8575 |
|---|---|---|---|
| OUT_1 | 0x20 | GPA7 | P07 |
| OUT_2 | 0x20 | GPA6 | P06 |
| OUT_3 | 0x20 | GPA5 | P05 |
| OUT_4 | 0x20 | GPA4 | P04 |
| OUT_5 | 0x20 | GPA3 | P03 |
| OUT_6 | 0x20 | GPA3 | P02 |
| OUT_7 | 0x20 | GPA1 | P01 |
| OUT_8 | 0x20 | GPA0 | P00 |
| OUT_9 | 0x21 | GPA7 | P07 |
| OUT_10 | 0x21 | GPA6 | P06 |
| OUT_11 | 0x21 | GPA5 | P05 |
| OUT_12 | 0x21 | GPA4 | P04 |
| OUT_13 | 0x21 | GPA3 | P03 |
| OUT_14 | 0x21 | GPA3 | P02 |
| OUT_15 | 0x21 | GPA1 | P01 |
| OUT_16 | 0x21 | GPA0 | P00 |
| OUT_17 | 0x22 | GPA7 | P07 |
| OUT_18 | 0x22 | GPA6 | P06 |
| OUT_19 | 0x22 | GPA5 | P05 |
| OUT_20 | 0x22 | GPA4 | P04 |
| OUT_21 | 0x22 | GPA3 | P03 |
| OUT_22 | 0x22 | GPA3 | P02 |
| OUT_23 | 0x22 | GPA1 | P01 |
| OUT_24 | 0x22 | GPA0 | P00 |
| OUT_25 | 0x20 | GPB0 | P10 |
| OUT_26 | 0x20 | GPB1 | P11 |
| OUT_27 | 0x20 | GPB2 | P12 |
| OUT_28 | 0x20 | GPB3 | P13 |
| OUT_29 | 0x20 | GPB4 | P14 |
| OUT_30 | 0x20 | GPB5 | P15 |
| OUT_31 | 0x20 | GPB6 | P16 |
| OUT_32 | 0x20 | GPB7 | P17 |
| OUT_33 | 0x21 | GPB0 | P10 |
| OUT_34 | 0x21 | GPB1 | P11 |
| OUT_35 | 0x21 | GPB2 | P12 |
| OUT_36 | 0x21 | GPB3 | P13 |
| OUT_37 | 0x21 | GPB4 | P14 |
| OUT_38 | 0x21 | GPB5 | P15 |
| OUT_39 | 0x21 | GPB6 | P16 |
| OUT_40 | 0x21 | GPB7 | P17 |
| OUT_41 | 0x22 | GPB0 | P10 |
| OUT_42 | 0x22 | GPB1 | P11 |
| OUT_43 | 0x22 | GPB2 | P12 |
| OUT_44 | 0x22 | GPB3 | P13 |
| OUT_45 | 0x22 | GPB4 | P14 |
| OUT_46 | 0x22 | GPB5 | P15 |
| OUT_47 | 0x22 | GPB6 | P16 |
| OUT_48 | 0x22 | GPB7 | P17 |
Fet type¶
The board uses 48 P-type mosfets
Expanders Control¶
Using jumpers, you can control the selection of expanders. A jumper connected to GND gives you control of MCP23017 expanders, and a jumper connected to 3.3V gives you control of PCF8575 expanders
| Control | Jumper |
|---|---|
| MCP23017 | GND |
| PCF8575 | 3.3V |
MOSFET Power Connectors¶
Connecting all the jumpers on the board allows you to control the power supply from the power supply that feeds the boneio ESP 24V DC controller.
There are 8 jumpers on the board. The 4 jumpers on the top side connect the 24V DC power supply of the controller to the OUTPUT_1, OUTPUT_3, OUTPUT_6 and OUTPUT_8 connector. The jumper connection on the bottom side connects OUTPUT_1 to OUTPUT_2, OUTPUT_3 to OUTPUT_4, OUTPUT_5 to OUTPUT_6 and OUTPUT_7 to OUTPUT_8.
