Difference between revisions of "TWOG/add i2c1"
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[[Category:Hardware]] | [[Category:Hardware]] | ||
It can be handy to have a second I2C port on the TWOG v1.00 or Tiny v2.11. This allows to separate flight sensitive sensors (e.g. IMU) from payload sensors. | |||
= Add 2nd I2C port to TWOG/Tiny on ADC2/J8 = | |||
ADC2/J8 can easily be modified to have the same pinout as the original I2C/J6 port. | ADC2/J8 can easily be modified to have the same pinout as the original I2C/J6 port. | ||
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[[Image:Twog_v100_i2c1_mod.jpg]] | [[Image:Twog_v100_i2c1_mod.jpg]] | ||
= Add 2nd I2C port to Tiny = | |||
= Add 2nd I2C port to TWOG/Tiny on J11/IRH = | |||
J11/IRH can be modified to carry I2C signales. Make sure you provide 5V if needed. | |||
add a new 10k resistor on the 3.3V side of R17 | |||
cut the trace at J11_IRH_IRH_1 (pin 4) | |||
cut the trace at J11_IRH_IRH_2 (pin 3) | |||
connect J11_IRH_IRH_1 with other side of new 10k resistor | |||
connect other side of new 10k resistor with J2_CTS (SCL1) | |||
connect J11_IRH_IRH_2 J7_BOOT (SDA1) | |||
secure the thin wire with small dots of hot glue | |||
The original I2C/J6 is i2c0 and J11/IRH becomes i2c1. | |||
==Modification TWOG/Tiny== | |||
[[Image:Twog_i2c1_irh.jpg]] | |||
= Add 2nd I2C port to Tiny on Download/J7 = | |||
On the Tiny Download/J7 can also be modified to have I2C. | On the Tiny Download/J7 can also be modified to have I2C. | ||
Latest revision as of 01:03, 20 August 2013
It can be handy to have a second I2C port on the TWOG v1.00 or Tiny v2.11. This allows to separate flight sensitive sensors (e.g. IMU) from payload sensors.
Add 2nd I2C port to TWOG/Tiny on ADC2/J8
ADC2/J8 can easily be modified to have the same pinout as the original I2C/J6 port.
remove R12 replace R13 with a 10k resistor cut the trace between R13 and R15 connect the (then) open end of R13 with 3.3V at R17 connect J8_IN_ADC_6 with J7_BOOT (SDA1) connect J8_IN_ADC_5 with J2_CTS (SCL1) secure the thin wire with small dots of hot glue
The original I2C/J6 is i2c0 and ADC2/J8 becomes i2c1.
Modification TWOG/Tiny
Add 2nd I2C port to TWOG/Tiny on J11/IRH
J11/IRH can be modified to carry I2C signales. Make sure you provide 5V if needed.
add a new 10k resistor on the 3.3V side of R17 cut the trace at J11_IRH_IRH_1 (pin 4) cut the trace at J11_IRH_IRH_2 (pin 3) connect J11_IRH_IRH_1 with other side of new 10k resistor connect other side of new 10k resistor with J2_CTS (SCL1) connect J11_IRH_IRH_2 J7_BOOT (SDA1) secure the thin wire with small dots of hot glue
The original I2C/J6 is i2c0 and J11/IRH becomes i2c1.
Modification TWOG/Tiny
Add 2nd I2C port to Tiny on Download/J7
On the Tiny Download/J7 can also be modified to have I2C.
cut the trace between J7_LPC_TXD0 and the IC5/LPC2148 add a 10k pull-up resistor to J7_+3.3v connect other side of the new 10k to J7_LPC_TXD0 connect J7_LPC_TXD0 with J2_CTS (SCL1) secure the thin wire with small dots of hot glue
The original I2C/J6 is i2c0 and Download/J7 becomes i2c1 (J7_LPC_TXD0 = SCL1, J7_BOOT = SDA1).
Modification Tiny
