beaglebone sensor brick

[bitleiste]

wer auch mit dem beagleboard und FHEM unterwegs ist, ich steuere damit meine Heizungsanlage.

hätte noch 7 Platinen mit oder ohne Bauteile zum Selbstkosten Preis abzugeben.

Features
Extensive I/O connections:

(5) 5V GPIOs
(2) 5V UART connections (auto direction detection)
(1) 5V I2C bus connections (auto direction detection)
(1) 5V PWM
(4) 5V Timers
(1) 3.3V UART: J9, J10, J17, J19, J20, J21, J22
(1) 3.3V SPI_D1
(1) 3.3V PWM
(7) 1.8V analog GVS connections with analog reference voltage/ground
5V pins are all ESD protected pins with 15 kV of protection
Fuses on 5V and 3.3V power protect the Beaglebone from miswired sensors
Selectable 5V source (SYS_5V or VDD_5V) - J22
Cape configuration EEPROM with address select jumpers
Beaglebone Black form factor
Technical Overview
In a nutshell, the 3.3V digital signals of the Beaglebone Black need to be changed into 5V digital signals. There are a number of discrete ways to convert 3.3V bus to 5V signals. Some of them use MOSFETs and a couple of resistors. These work OK but there are some powerful chips out there that can do the conversion even better. We looked around and found what we think is the best 3.3V<>5V data conversion chip, Texas Instrument's TXS0108. The TXS0108 is an 8-bit, bi-directional buffer with automatic direction detection. Each and every pin can transmit and receive independently and even at the same time. The part supports both open drain and push-pull operation. The part can run as fast as 60 Mb/s in push-pull operation and 2 Mb/s in open drain. This speed is fast enough enough for microprocessor GPIO pin or even the fastest serial interfaces that a microprocessor can throw at it.

Anfrage bitte per PM.

Gruß Andreas