11 votes

What type of connector does the GROVE system use?

Here is the updated link on the seed website. http://wiki.seeedstudio.com/wiki/File:3470130P1.pdf Also note that Digikey now stocks seeedstudio stuff. http://www.digikey.com/product-detail/en/seeed-...
TomKeddie's user avatar
  • 237
8 votes

What type of connector does the GROVE system use?

I believe the OEM part is NS-Tech 1125S-4P: Wire to Board connector > PITCH 2.00mm > 1125 Series Good luck finding a vendor!
Aaron Cooper's user avatar
8 votes
Accepted

Confused between SPI and I2C for SSD1306 OLED

SCK and SCL are the same thing. Serial ClocK Serial CLock They seem to be interchangeable. The fact you have SDA (Serial DAta) as opposed to separate SDI / SDO or MOSI / MISO pins means it's I2C. ...
Majenko's user avatar
  • 105k
6 votes

7 segment 4 digit not showing numbers 2,3 and 0

It looks like you have the center segment and the top left vertical segment reversed. For the image you show, if you switched the on/off states of those 2 segments, you'd see 1230. I don't know if the ...
Duncan C's user avatar
  • 5,682
5 votes
Accepted

What are these wires called?

If they are an intentional part of the design they are jumper wires. If they are to correct a mistake in the design they are bodge wires. They aren't anything special, just wire. They look to be in ...
Majenko's user avatar
  • 105k
5 votes

Wiring when burning the bootloader of esp8266

The ESP8266 already has a bootloader to upload new firmware over UART. You don't need to burn anything, and you don't use SPI to program it. AVR microcontrollers are programmed (aka flashed, or ...
tttapa's user avatar
  • 1,320
5 votes
Accepted

How to wire a three-pin on-off-on switch for reading input?

You talk about wiring a switch to control lights directly. Instead, you want to use your switch to send information to your Arduino. You link to an SPDT (single pole, double throw) switch. When ...
Duncan C's user avatar
  • 5,682
5 votes

Arduino UNO won't move servo

You have not connected the supply pin properly. here is the connection diagram for the standard basic Arduino example I also verified this on the video you have linked. Connect the 5V and you should ...
ArduinoFan's user avatar
  • 1,059
4 votes

do i need to also connect GND and 3.3v

It is just so obvious that you should connect them that they did not bother to write it down. The reader needs power. That is taken as read. Without power it can do nothing. Why would they bother to ...
Majenko's user avatar
  • 105k
4 votes

Arduino board is turning off when I connect to +5V

Try out this connection. It will helpful.
Hasan's user avatar
  • 1,476
4 votes
Accepted

Connecting CAT5 robustly between portable Arduino and more portable sensors

Certainly go for RJ45 sockets. Not only does it help protect the wire, but it gives you a really easy way of swapping the wire for different lengths should you want to. You can't solder an RJ45 ...
Majenko's user avatar
  • 105k
4 votes
Accepted

How to prevent shoot-through when swiching a motor with a bridge?

You only get this kind of problem when you are manually controlling the high- and low-side switches manually. Bridge chips seldom make you do that and include the logic and drive circuitry within ...
Majenko's user avatar
  • 105k
4 votes
Accepted

Does AWG size affect signal from sensors?

A signal is just a varying voltage. A wire is just a (very long) small resistor. The device reading the signal is just a current sink. That's three terms there: voltage, resistance, and current. ...
Majenko's user avatar
  • 105k
4 votes

How to wire a three-pin on-off-on switch for reading input?

I suggest this simple circuit: simulate this circuit – Schematic created using CircuitLab Set both inputs to INPUT_PULLUP. If the input reads LOW, that means it has been grounded by the switch. ...
Edgar Bonet's user avatar
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3 votes
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How to use Arduino Pro Mini without Programmer

You might be on the wrong track. You do need a crystal (or not, it depends on), and an Atmel programmer if you want to program an empty chip. However, all Arduino boards come with a chip pre-...
Gee Bee's user avatar
  • 771
3 votes
Accepted

Attach headers to servo wires?

What I do in situations like that is get some of those breadboard hookup wires, like you have in your second photo, cut them in the middle (giving yourself two wires, each with a bare end, and a end ...
Nick Gammon's user avatar
  • 38.2k
3 votes

What type of connector does the GROVE system use?

It is proprietary. It makes it hard to build your own custom length cables. But then if you are, you probably don't need Grove modules in the first place. I would use them more if I could build a ...
Elf55's user avatar
  • 31
3 votes
Accepted

Attiny85 DigiSpark: Drive 128X64 OLED screen, no picture problem

With I2C you always need pull up resistors on the data lines, otherwise nothing works. Normally ones around 4.7K for a Uno, not sure what they should be for a Tiny. If you are unsure about the I2C ...
Code Gorilla's user avatar
  • 5,637
3 votes
Accepted

Powering on the PC

The two pins aren't +5V power and ground. One of them will be what you think, the other will be a signal wire with a pull up/down. So if the ground wire really is ground then the other wire is the ...
Andrew's user avatar
  • 1,050
3 votes

What are these wires called?

If you want to wire your board with stranded wire, you can ask for NYAF and solder the edges with the tip. Otherwise you can ask for hook-up wires. But if you are using breadboard, which i recommend ...
cosa__'s user avatar
  • 31
3 votes

Arduino UNO and TB67H303HG Ic driver: Wiring question

The Vref potential should not be 24V. As mentionned in the datasheet: Vref = 0.3V to 1.95V depending on what you want.
Johan B's user avatar
  • 131
3 votes

Can an Arduino Pro Mini interface with a full-sized WiFi shield?

I would like to know if they can be connected and, if so, how. Yes. but can we place the shield on the breadboard No, the pins are misaligned and won't plug in. and use jumper wire to connect ...
Majenko's user avatar
  • 105k
3 votes
Accepted

Sending minimal data between two Arduinos far away from each other

RS-485 is best (you can buy some modules for this from Adafruit, Amazon, eBay, etc), but you can use the built-in hardware RS-232 serial UARTs from each on pins 0 and 1 so long as the baud rate is ...
Gabriel Staples's user avatar
3 votes
Accepted

Adding a common activation pin to a group of buttons

You can connect all the buttons to a single interrupt pin by ORing them via diodes (like Gerben wrote in the comments). That would look like this: simulate this circuit – Schematic created ...
chrisl's user avatar
  • 16.3k
2 votes

Is there a semi-permanent way to attach wires to the Nano?

Here's what I use, repeatedly, successfully. It fits the Nano headers, and gives you screw terminals for proto work.
Bevan's user avatar
  • 129
2 votes

Start timer when pins connected

Are you familiar with interrupts? The best/most efficient way to do this is with pin interrupts on each input pin (and make sure your switches are wired correctly and debounced). Unfortunately, ...
uint128_t's user avatar
  • 819
2 votes

Start timer when pins connected

I will not give you code, only clues on how to write the code yourself. The way to tackle this is to (at first) remove the Arduino from the equation. Replace it, instead, with you. Imagine you are ...
Majenko's user avatar
  • 105k
2 votes

Best practices for really long distance sensor deployments

Personally I wouldn't use an Arduino as a wireless sensor controller, I would use an ESP8226, which comes with WIFI interface built in. You can program this through the Arduino IDE in the same ...
Code Gorilla's user avatar
  • 5,637
2 votes
Accepted

Best practices for really long distance sensor deployments

There's as many ways of solving your problem as there are of skinning a cat (those poor poor cats - always getting skinned... ;) ) As you have already noted there are two basic solutions: wired or ...
Majenko's user avatar
  • 105k

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