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oak:tutorials:levelshift [2016/02/21 00:13]
pfeerick Moved bi-directional sensor bit, and annotated
oak:tutorials:levelshift [2016/03/21 16:17] (current)
digistump [Using the Oak Level Shifter:]
Line 140: Line 140:
 Whatever voltage is supplied to the Oak Level Shifter shield VIN is distributed (directly connected) to each of the Level Shifter shield pins labeled 5V. As such, all external devices connected to pins labeled 5V will receive the actual VIN supply voltage. Whatever voltage is supplied to the Oak Level Shifter shield VIN is distributed (directly connected) to each of the Level Shifter shield pins labeled 5V. As such, all external devices connected to pins labeled 5V will receive the actual VIN supply voltage.
  
-Oak regulates VIN supplied at either of the Oak's VIN pins for use by Oak, but will pass through VIN supplied at the Oak's VIN 4.5-12V tolerant pin to the Oak Level Shifter shield VIN pin. Therefore, the Oak's VIN pin if used to supply voltage to the Oak (not recommended when using the Oak Level Shifter shield) should be limited to recommended ratings for level shifter IC (5V). +Oak regulates VIN supplied at either of the Oak's VIN pins for use by Oak, but will pass through VIN supplied at the Oak's VIN 4.5-12V tolerant pin to the Oak Level Shifter shield VIN pin. Therefore, the Oak's VIN pin if used to supply voltage to the Oak (not recommended when using the Oak Level Shifter shield) should be limited to recommended ratings for level shifter IC (5V). 
 + 
 +//**Pinout Correction for the P1 Servo Header:​**//​ 
 + 
 +The pins labeled GND and P1 for the center servo header on the level shifter are reversed. GND is actually P1 and P1 is actually GND. This only applies to the servo header that uses P1 for signal output. 
 +{{ :​oak:​tutorials:​oak-level-shifter-shield-24.jpg?​direct&​300 |}} 
 + 
 +//** Using with bi-directional sensors: **//
  
-//** Using with bi-directional sensors **// 
 Since the level shifter IC used on this level shifter is not an automatic bi-directional level shifter, if you  you wish to use bi-directional sensors such as the popular OneWire DS18B20, you will need to use the I2C pins on the shield. SDA is P0 on the Oak, and SCL is P2.  Since the level shifter IC used on this level shifter is not an automatic bi-directional level shifter, if you  you wish to use bi-directional sensors such as the popular OneWire DS18B20, you will need to use the I2C pins on the shield. SDA is P0 on the Oak, and SCL is P2. 
oak/tutorials/levelshift.1456042380.txt.gz · Last modified: 2016/02/21 00:13 by pfeerick