UUGear Zero2Go Omini, User Manual

Page 1: ...Copyright 2017 UUGear s r o All rights reserved Zero2Go Wide Input Range Power Supply for Your Raspberry Pi User Manual revision 1 02 ...

Page 2: ... Details 3 Package Content 4 Specifications 5 Mounting on Raspberry Pi Zero 6 Mounting on Other Raspberry Pi Models 8 Connect Power Source 10 Working Modes 12 Before Installing Software 13 Software Installation 14 GPIO Pins Used by Zero2Go 15 About the Protective Frame 16 Revision History 17 ...

Page 3: ...th Raspberry Pi Zero No soldering required when mounting on Raspberry Pi Zero Wide range input voltage 5 26V Reversed polarity protection Connect power source via micro USB DC power plug or electric wires Support pass through and step down modes auto switching Single tap to startup shutdown Raspberry Pi Zero2Go has quite wide input range 5V 26V so it is will be convenient to power your Raspberry P...

Page 4: ... Zero2Go works The diagram below gives you the main idea If the input voltage is higher than 5 5V then the DC DC converter will be used otherwise the input voltage will pass through to output The e Latching Switch will maintain the power if system is up and the button on Zero2Go is not tapped or hold Since DC DC converter needs more dropout to work well inputting 5 5 7 0V should be avoided when po...

Page 5: ...ce connection 2 Red LED as error indicator 3 Green LED as DC DC step down indicator 4 Blue LED as 5V pass through indicator 5 Terminal block for power source connection 6 DC power jack for power source connection 7 Tact switch for power on off 8 40 pin header footprint 9 Acrylic protective frame ...

Page 6: ...4 Package Content Each package of Zero2Go contains Zero2Go board x 1 Plastic male female standoff x 4 M2 5 x 4 mm screws x 4 M2 5 nuts x 4 Dual head Pogo pin connector 5 pin set ...

Page 7: ...when input pass through to output Static Current 0 5mA when Vin 5V 4mA when Vin 26V 3 1 Input 5 5 7 0V is not recommended as the DC DC converter needs more dropout to work well 2 Without adding heat sink to DC DC chip and the inductor U2 and L1 we suggest to keep the current below 1 5A for long term usage If you are using the Pogo pin connector to output all current to Raspberry Pi Zero and periph...

Page 8: ... 40 pin header soldered the first step is to fix the 4 male female standoffs on four corners with screws Then you place the pogo pin connector on the correct position Please make sure the small tip on the plastic frame is on the right and it points to the SD card as shown below ...

Page 9: ...your Zero2Go at its place You may find tweezers are quite helpful in this case After tightening the 4 nuts Zero2Go is now firmly mounted on your Raspberry Pi Zero Please notice the pogo pin connector is designed to work with 1A current if you are expecting a much higher current output please consider soldering a 40 pin header for the connection ...

Page 10: ...ro2Go Optionally it could be a stacking header which has extra long pins Below is such an example If you are mounting Zero2Go on a Pi Zero with a female 40 pin header soldered you should solder a male 40 pin header on your Zero2Go This is also the suggested way for driving high current devices from Pi Zero After soldering the pin header mounting Zero2Go to your Raspberry Pi is the same with mounti...

Page 11: ...9 ...

Page 12: ... matching plug The official Raspberry Pi power adapter many mobile phone chargers and all power banks belongs to this category Although most devices that output 5V to micro USB this micro USB port can accept 5 26V The terminal block in white can connect metal wires with diameter 0 5 1mm When connecting or disconnecting a wire you need to push the small button on top and then insert or withdraw the...

Page 13: ...ower source connection If the DC power jack is used it is recommended to take additional efforts to fix the barrel shaped plug on its place Please keep in mind that the power source should have very solid connection to Zero2Go If you are using the terminal block please make sure the wires are tightly fixed and they should not be disconnected during the usage If the connection is not reliable it co...

Page 14: ...e a single tap on the button K1 will turn on your Raspberry Pi If the input voltage is less than 5 5V Zero2Go works in pass through mode and the input voltage will be directly output with very low voltage drop In this case the blue LED will light up If the input voltage is higher than 5 5V Zero2Go works in step down mode and the DC DC converter will convert input voltage to 5V output In this case ...

Page 15: ...n other operating systems If you have installed the OS with NOOBS please make sure to skip the boot menu Otherwise the boot menu will postpone the booting long enough to make Zero2Go think the system is down and then cut the power so your Raspberry Pi will not boot Here is how to skip the NOOBS boot menu you insert your SD card to your PC use a SD card reader if your PC doesn t have SD card slot o...

Page 16: ...ero2Go s software is a subset of the software for Witty Pi So if you have installed Witty Pi s software on your Raspberry Pi you don t need to install Zero2Go s software and it will work just out of the box To install Zero2Go s software please run this command in your home directory If your Raspberry Pi has internet connection it will immediately download the script from our website and you will t...

Page 17: ...g enough 3 seconds GPIO BCM Name Physical Name GPIO BCM 3 3V 1 2 5V 2 SDA 1 3 4 5V 3 SCL 1 5 6 GND 4 GPIO 7 7 8 TXD 14 GND 9 10 RXD 15 17 GPIO 0 11 12 GPIO 1 18 27 GPIO 2 13 14 GND 22 GPIO 3 15 16 GPIO 4 23 3 3V 17 18 GPIO 5 24 10 MOSI 19 20 GND 9 MISO 21 22 GPIO 6 25 11 SCLK 23 24 CE0 8 GND 25 26 CE1 7 0 SDA 0 27 28 SCL 0 1 5 GPIO 21 29 30 GND 6 GPIO 22 31 32 GPIO 26 12 13 GPIO 23 33 34 GND 19 GP...

Page 18: ...back channel is interfered the PWM module will collect wrong sample and the output voltage will be wrong In Zero2Go we use a SO 8 IC U2 to build the DC DC converter some resistors and capacitors around setup the feedback channel for it If you use a finger to touch some of them at the same time you may interfere the feedback channel and the result could be disaster scenario A in figure below With t...

Page 19: ...17 Revision History Revision Date Description 1 00 2016 11 22 Initial revision 1 01 2017 03 03 Add caution about unreliable power source connection 1 02 2017 04 03 Add Before Installing Software section ...