Raspberry Pi Forums

IvanAK wrote:This is my Led strip

If you plan on turning it on and off a few times a day, this will work great. If you're planning on turning it on and off a few times per minute, the relay will only last a few months.

For this sort of use, or for PWM dimming, you'll need to upgrade your relay to solid state if you want it to last.

IvanAK wrote:

If you plan on turning it on and off a few times a day, this will work great. If you're planning on turning it on and off a few times per minute, the relay will only last a few months.

Yes i'm planing to turning it on and off a few times.

For this sort of use, or for PWM dimming, you'll need to upgrade your relay to solid state if you want it to last.

I have this two types of relay ( im going to use the big one )
http://s28.postimg.org/nj6qo46x9/20140405_023026.jpg
I hope it will last ...

Tarcas wrote:It looks right to me, not that I'm an electrical engineer or anything.

GPIO Z is +5v, header pin 2
GPIO Y is GND, so pin 6. (There are some DNC pins which are also connected to GND, but I don't know those off the top of my head.)
GPIO X can go to any of the 17 controllable GPIO pins on the Pi, as long as the code and the hardware match up. If it's the only thing you're using the GPIO header for, it doesn't really matter which one you choose.

If you plan on turning it on and off a few times a day, this will work great. If you're planning on turning it on and off a few times per minute, the relay will only last a few months. For this sort of use, or for PWM dimming, you'll need to upgrade your relay to solid state if you want it to last.

IvanAK wrote:

Tarcas wrote:It looks right to me, not that I'm an electrical engineer or anything.

GPIO Z is +5v, header pin 2
GPIO Y is GND, so pin 6. (There are some DNC pins which are also connected to GND, but I don't know those off the top of my head.)
GPIO X can go to any of the 17 controllable GPIO pins on the Pi, as long as the code and the hardware match up. If it's the only thing you're using the GPIO header for, it doesn't really matter which one you choose.

If you plan on turning it on and off a few times a day, this will work great. If you're planning on turning it on and off a few times per minute, the relay will only last a few months. For this sort of use, or for PWM dimming, you'll need to upgrade your relay to solid state if you want it to last.

How do i control this situation, just typical gpio 17 1 / gpio 17 0 or do i have to make more of this ?

root@raspberrypi:~# gpio readall
+----------+-Rev2-+------+--------+------+-------+
| wiringPi | GPIO | Phys | Name | Mode | Value |
+----------+------+------+--------+------+-------+
| 0 | 17 | 11 | GPIO 0 | IN | Low |
| 1 | 18 | 12 | GPIO 1 | IN | Low |
| 2 | 27 | 13 | GPIO 2 | IN | Low |
| 3 | 22 | 15 | GPIO 3 | IN | Low |
| 4 | 23 | 16 | GPIO 4 | IN | Low |
| 5 | 24 | 18 | GPIO 5 | IN | Low |
| 6 | 25 | 22 | GPIO 6 | IN | Low |
| 7 | 4 | 7 | GPIO 7 | IN | Low |
| 8 | 2 | 3 | SDA | IN | High |
| 9 | 3 | 5 | SCL | IN | High |
| 10 | 8 | 24 | CE0 | IN | Low |
| 11 | 7 | 26 | CE1 | IN | Low |
| 12 | 10 | 19 | MOSI | IN | Low |
| 13 | 9 | 21 | MISO | IN | Low |
| 14 | 11 | 23 | SCLK | IN | Low |
| 15 | 14 | 8 | TxD | ALT0 | High |
| 16 | 15 | 10 | RxD | ALT0 | High |
| 17 | 28 | 3 | GPIO 8 | OUT | Low |
| 18 | 29 | 4 | GPIO 9 | ALT2 | Low |
| 19 | 30 | 5 | GPIO10 | ALT2 | Low |
| 20 | 31 | 6 | GPIO11 | ALT2 | Low |
+----------+------+------+--------+------+-------+

gpio mode 0 out
gpio write 0 0 or gpio write 0 1

IvanAK wrote:I have two kind of relay, im using the big one

http://postimg.org/gallery/23zt7ptm/

Please make sure everything is removed and press the ENTER key to continue,
or Control-C to abort...

The main 8 GPIO pins 0: 7: OK
The 4 pins on the P5 connector 17:20: OK
The 5 SPI pins 10:14: OK
The serial pins 15:16: OK
The I2C pins 8: 9: OK

root@raspberrypi:/# gpio readall
+----------+-Rev2-+------+--------+------+-------+
| wiringPi | GPIO | Phys | Name | Mode | Value |
+----------+------+------+--------+------+-------+
| 0 | 17 | 11 | GPIO 0 | OUT | High |
| 1 | 18 | 12 | GPIO 1 | IN | Low |
| 2 | 27 | 13 | GPIO 2 | IN | Low |
| 3 | 22 | 15 | GPIO 3 | IN | Low |
| 4 | 23 | 16 | GPIO 4 | IN | Low |
| 5 | 24 | 18 | GPIO 5 | IN | Low |
| 6 | 25 | 22 | GPIO 6 | IN | Low |
| 7 | 4 | 7 | GPIO 7 | IN | Low |
| 8 | 2 | 3 | SDA | IN | High |
| 9 | 3 | 5 | SCL | IN | High |
| 10 | 8 | 24 | CE0 | IN | Low |
| 11 | 7 | 26 | CE1 | IN | Low |
| 12 | 10 | 19 | MOSI | IN | Low |
| 13 | 9 | 21 | MISO | IN | Low |
| 14 | 11 | 23 | SCLK | IN | Low |
| 15 | 14 | 8 | TxD | IN | Low |
| 16 | 15 | 10 | RxD | IN | Low |
| 17 | 28 | 3 | GPIO 8 | IN | Low |
| 18 | 29 | 4 | GPIO 9 | IN | Low |
| 19 | 30 | 5 | GPIO10 | IN | Low |
| 20 | 31 | 6 | GPIO11 | IN | Low |
+----------+------+------+--------+------+-------+

IvanAK wrote:I try to connect again with more space between so this is how it looks now ...

http://postimg.org/gallery/bgna4phq/

EDIT: I looked at the pictures again, and your diode appears to be in backwards. I think. I'm not an electronics expert, but if it's wired the way I think it is, you need to turn the diode around. To double-check, it should be reverse-biased against the flow of current, so that it does not pass current in normal operation, but only comes into play to dissipate the collapsing inductive load from the relay's coil when it is turned off.

Have you tried connecting the base of the transistor to GND and 3.3v, and if so, does the relay click when you connect it to one of those?

IvanAK wrote:

Have you tried connecting the base of the transistor to GND and 3.3v, and if so, does the relay click when you connect it to one of those?

I did this too ( from physical pin 11 to pin 17 nothing happen nothing change ) i put the base far from the other ones still nothing and still trying to get this work

Tarcas wrote:

IvanAK wrote:

Have you tried connecting the base of the transistor to GND and 3.3v, and if so, does the relay click when you connect it to one of those?

I did this too ( from physical pin 11 to pin 17 nothing happen nothing change ) i put the base far from the other ones still nothing and still trying to get this work

I mean to physical pin 1 and 6 (not at the same time, of course.) If one of those doesn't trigger the relay, you definitely have a hardware problem.

Tarcas wrote:I think your Pi is fine. It's the wiring on the breadboard that's suspect.

Is there an option to move this thread to the Automation, Sensing, and Robotics forum? This qualifies as automation (of turning your LED strip on and off) and some of the people there will be more familiar with electronics, I think.