In this guide we build our own I2C logic converter to let 3.3V and 5V I2C devices co-exist on same bus. Uses: I2C bus, and Lots of soldering ! (The final board here at bottom used hot air soldering)īuilding I2C logic converter – New 29. This way you can connect up to 8 boards getting 32 channels in and 8 channels out. PCF8591 Analog To Digital – Braking out of the boxīuilding your own Analog to Digital board to over come limits of the bought brake-out board. Raspberry PI has no Analog inputs or outputs, so to talk to analog devices we need to convert the signal. Apr 2017Ĭonnecting to RDM6300 RFID reader board (125 khz) from Xojo using serial communications. Oct 2016Ĭonnecting to MFRC-522 RFID reader board (13.56 Mhz) from Xojo, using Python drivers. MFRC-522 RFID reader in Xojo (Bridged with Python) – New 29. Putting the GPIO pin behind transistor to get more currentĪnd also dealing with undetermined state of the GPIO pin at boot time.Ĭreating complete isolation between two separate circuits but sending signals between them.īasic introduction of logic gates and how you can use them in your Raspberry PI circuits with Xojo. (Simple wiring, simple code but more detailed focus on the math and how things work) Working with LED’s – And Wiring 4 pin RGB led to Raspberry PI In this example we are going to connect to HC-SR04 and or US-015 ultrasonic sensorsĬonnecting button with GPIO and using interrupts. IR Infrared Obstacle Reflection Photoelectric Sensor Includes Xojo module that acts as device driver for the BMP180 sensor. Includes DHT11 device driver Xojo Module and DHT22 device driver module.īMP180 Barometer sensor on GY68 brake-out board (4 pin version) – (Updated 29. Simple polling, easy wiringĭHT11 and DHT22 humidity & temperature sensors (3 pin version) In this example we are going to connect to flame sensor.

Polling can be replaced by using interrupts, see our interrupts examples bellow. This example uses simple polling, and has very easy wiring. In this example we are going to connect to F85 vibration sensor.

In this example we wire up a relay board and let your Xojo code control it. Sensors: HC-SR501, ST-00082 Mini, Mini IR Pyroelectric Infrared PIR Motion Human Sensor Detector Module Shows 2 ways of coding: Using Interrupts or simple polling.

Xojo serial