Seeeduino 1.1 - polarity power connector

Forum 2005-2010 (read only) General Frequently-Asked Questions
1

Title says it all. I need to know how the polarity is for the seeeduino v1.1 (probably similar to v2.12) external power connector.

I don't have the wires that Seeedstudio sells, so I am going to power it with a different connector that fits it.

Also, the Vin (near gnd/+5v pins). What is this used for? Does it supply the power at a similar voltage level as where you power the Seeeduino with?

2

The seeeduino is an arduino clone and has very similar specs.

  • Microcontroller____ATmega168
  • Operating Voltage_____5V/3.3V
  • Input Voltage (recommended)_____7-12 V
  • Input Voltage (limits)_____6-20 V
  • Digital I/O Pins_____14 (of which 6 provide PWM output)
  • Analog Input Pins_____8
  • DC Current per I/O Pin_____40 mA
  • DC Current for 3.3V Pin_____50 mA
  • Flash Memory_____16 KB (of which 2 KB used by bootloader)
  • SRAM_____1 KB
  • EEPROM_____512 bytes
  • Clock Speed_____16 MHz

Just follow the traces from the connector to the header on the board that has the voltage and ground labels.

As with all electronic devices the pin labeled Vin is for positive voltage input. So if your plugging in a battery pack the positive lead goes to Vin and the negative lead goes to ground. So any battery pack that supplies between 7 and 12 v can be connected there or at the power connector.

3

Just follow the traces from the connector to the header on the board that has the voltage and ground labels.

I will do that when I am near my power meter. In the mean time, if someone that is using this one could answer, it's appreciated.

As with all electronic devices the pin labeled Vin is for positive voltage input. So if your plugging in a battery pack the positive lead goes to Vin and the negative lead goes to ground. So any battery pack that supplies between 7 and 12 v can be connected there or at the power connector.

Thank you. So, i have actually 3 ways of powering the Seeeduino V1.1. By using the Vin and GND pin, by using the power connector and by use the USB connector.

Thanks for your help!

4

Found a good picture of it that gives the answer.

http://www.seeedstudio.com/depot/images/product/seeeduinoPCB.png

The pin near the edge is the positive lead and the other one is ground.

5

thank you very much! Now it's clear, the squar pad near the text 'EXT_PWR' is the positive pin (bottom-left in picture).

Thanks Mike!

6

The polarity of the Seeeduino board power is printed on the trace side of the pcb. It is backwards from the usual 2 pin JST pigtails so be careful to check. The positive connector is closest to the board edge, negative is next to the switch.

7

Please correct me if I'm wrong but you have 4 ways to power a Seeeduino (any 'Duino?) board.

  1. External power — 7-12V
  2. USB
  3. Vin pin — 7-12V
    4. 5V — plug a regulated 5V supply directly to one of the 5V pins

N.B. I reserve the right to be wrong.

[m]

8

If you want to get technical, the VIN and External are the exact same thing... so only 3 :wink:

9

:wink:

True. I've just found it easier to fly a 5V jumper from my breadboard that has a 7505 regulator on it than find a plug to go into the External socket.