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by ame
Sat Dec 26, 2015 10:06 am
Forum: Other projects
Topic: card slots
Replies: 20
Views: 3913

Re: card slots

gsgs wrote:--------------------------------
ame,
ok, I ordered the "piHut" card, just to see whether it really boots
-----------------------------------
Well, I hope it does, but you could easily make your own bootable card.
by ame
Sat Dec 26, 2015 9:49 am
Forum: Other projects
Topic: card slots
Replies: 20
Views: 3913

Re: card slots

one card that makes the pi (pi-zero ?) into an advanced musicplayer (navigation,effects, another card that makes it a chess-player another card for thermometer,barometer, weather recording another card for heart-monitor, ECG another card for timing etc. another card for email, browsing another card...
by ame
Sat Dec 26, 2015 9:46 am
Forum: Beginners
Topic: trs to yellow and red rca???
Replies: 6
Views: 1506

Re: trs to yellow and red rca???

I know that they normally take trrs but I was wondering whether this type of cable would work? It would work, but not for video. You will get audio left and audio right signals on your red and yellow connectors. You will not get video because the long sleeve of the trs plug will short the video sig...
by ame
Sat Dec 26, 2015 8:49 am
Forum: Other projects
Topic: card slots
Replies: 20
Views: 3913

Re: card slots

gsgs wrote:And I don't like the current concept, how pi-cards are being sold. They are _not_
bootable, instead they require a keyboard command, what operating system
to install before they become bootable.
Bootable:
http://thepihut.com/products/raspbian-p ... ed-sd-card
by ame
Sat Dec 26, 2015 6:09 am
Forum: Automation, sensing and robotics
Topic: How do I connect multiple sensors and leds
Replies: 4
Views: 1556

Re: How do I connect multiple sensors and leds

Yes.

If you connect to the 5V pin the LEDs will be on all the time. If that's what you want.
by ame
Sat Dec 26, 2015 5:02 am
Forum: Automation, sensing and robotics
Topic: How do I connect multiple sensors and leds
Replies: 4
Views: 1556

Re: How do I connect multiple sensors and leds

Yes. You can make many connections to the 5V pin, and many connections to a GND pin.

Don't forget, there are two 5V pins, and several GND pins.

Also, make sure your devices have only 3.3V output. You must not connect a 5V signal to a Pi GPIO. The GPIO can only accept a 3.3V input.
by ame
Sat Dec 26, 2015 4:35 am
Forum: General discussion
Topic: Which is better Heat Sink or Fan?
Replies: 41
Views: 15577

Re: Which is better Heat Sink or Fan?

You should not need either. Pi is good up to 85 °C IIRC.
by ame
Sat Dec 26, 2015 4:33 am
Forum: Beginners
Topic: sending a text message using gammu
Replies: 1
Views: 1145

Re: sending a text message using gammu

I keep seeing people mention the word "modem" when they're using gammu to send a text message, I keep thinking they mean wifi dongle but I'm not really sure. I've been using an Edimax wifi dongle to send a text message with Gammu but all I get is this error: No response in specified timeout. Probab...
by ame
Sat Dec 26, 2015 2:57 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Opto isolated in/output: 24v -> 3.3v -> 24v
Replies: 2
Views: 1806

Re: Opto isolated in/output: 24v -> 3.3v -> 24v

Can you buy just optoisolators? If you can buy the basic components you can build the circuit yourself. For 24V detection (I am assuming it is dc, not ac), a dropper resistor is needed on the input to the optoisolator. Maybe 2.2k or 2.7k. The output of the optoisolator can connect to the Pi GPIO and...
by ame
Sat Dec 26, 2015 1:46 am
Forum: HATs and other add-ons
Topic: Buttons on GPIO
Replies: 1
Views: 786

Re: Buttons on GPIO

Buttons are pretty simple to use, but there are a few ways you can hook them up. If you are in control of the design you can choose how it's fine, but if you have to be compatible with another design you have to know what it is expecting. Fundamentally, the button connects a GPIO pin to GND (active ...
by ame
Fri Dec 25, 2015 11:52 am
Forum: General discussion
Topic: UART LCD
Replies: 2
Views: 828

Re: UART LCD

Here's something that does it:
https://www.sparkfun.com/products/258

It's a little expensive, but maybe you can find another. Or build one as suggested with an Arduino (I used to use a PIC for this).
by ame
Fri Dec 25, 2015 9:01 am
Forum: General discussion
Topic: New to Pi, need some kind advice
Replies: 9
Views: 2381

Re: New to Pi, need some kind advice

Oops. My bad.

I should have said "Kodi (formerly XBMC)". Luckily there are plenty of helpful posters to keep me honest.
by ame
Fri Dec 25, 2015 7:06 am
Forum: Automation, sensing and robotics
Topic: Rotary table
Replies: 3
Views: 1127

Re: Rotary table

Very do-able, but you're going to have to do a lot of fiddling. Controlling the motor is easy. The simplest way is with a pair if relays. You can control on/off and direction. There might be a problem with overshoot though, when the table moves a tiny amount after the power is cut. You could get rou...
by ame
Fri Dec 25, 2015 6:59 am
Forum: General discussion
Topic: New to Pi, need some kind advice
Replies: 9
Views: 2381

Re: New to Pi, need some kind advice

It sounds like you need some media server software.

Take a look at Kodi (formerly OpenELEC). You can download a complete image for the Pi- write it to an SD card and boot it!
by ame
Fri Dec 25, 2015 6:20 am
Forum: General discussion
Topic: pi and mp3
Replies: 2
Views: 794

Re: pi and mp3

Yes. What language will you write in? I like Python. You need to learn how to read the system click to get the time of day, how to generate a random number, and how to start a subprocess which plays the mp3 file. Choose any one of those and figure out how to do it, then put them all together. Start ...
by ame
Thu Dec 24, 2015 1:45 am
Forum: Beginners
Topic: Possible to use laptop instead of tv or monitor
Replies: 7
Views: 1634

Re: Possible to use laptop instead of tv or monitor

I just got my son a Raspberry Pi 2 starter kit. The instructions say to connect to a tv or monitor, but we don't have either of these...we only have a laptop (small apartment). Is it possible to connect the Raspberry Pi to our laptop or do we need to go out and get a monitor? Thanks in advance for ...
by ame
Thu Dec 24, 2015 1:39 am
Forum: General discussion
Topic: Pi Zero with headers
Replies: 50
Views: 10518

Re: Pi Zero with headers

Having just spent a happy couple of hours soldering headers on to a couple of Pi Zero's, I'd now cheerfully pay a little more for a version with the headers already installed. For most uses of a Pi Zero, I suspect people will need the GPIO interfaces, so though the availability of a rock bottom Pi ...
by ame
Thu Dec 24, 2015 1:31 am
Forum: General discussion
Topic: Raspberry Pi at the Public Library?
Replies: 13
Views: 2730

Re: Raspberry Pi at the Public Library?

When the Pi Zero becomes more easily available it is conceivable that people could take one home after using one at the library. It is true that the peripherals start to add up, but there could be shared keyboards, mice and monitors at the library, then the participants could take their Zero home an...
by ame
Thu Dec 24, 2015 12:34 am
Forum: Off topic discussion
Topic: Less powerful alternatives for raspberry pi
Replies: 51
Views: 6423

Re: Less powerful alternatives for raspberry pi

The main energy lost is the transmitter. If it logged to an SD card which was swapped everyday, there would be no need for any comms. (the blog I linked too suggests using the onboard LED as an indicator of activity, which may prevent the card being removed whilst in use). Right, I have built a sim...
by ame
Wed Dec 23, 2015 11:23 pm
Forum: Off topic discussion
Topic: Less powerful alternatives for raspberry pi
Replies: 51
Views: 6423

Re: Less powerful alternatives for raspberry pi

I'd suggest Arduino too. Can run off 4 AA cells for weeks and log things to an SD card.

You'd have to rewrite the Java code, but you can probably throw most of it away.
by ame
Wed Dec 23, 2015 11:19 pm
Forum: General discussion
Topic: switch on raspberry pi help
Replies: 13
Views: 2573

Re: switch on raspberry pi help

DougieLawson wrote:
ame wrote: OP only wants to turn the power on and off.
And if he/she does it your way their SDCard will get corrupted and their machine won't boot.
I may have mentioned how to avoid that.
by ame
Wed Dec 23, 2015 10:58 pm
Forum: General discussion
Topic: switch on raspberry pi help
Replies: 13
Views: 2573

Re: switch on raspberry pi help

I was thinking more of wiring it to the board through gpio pins Grab a 1K resistor (to protect the pin if you set it as output) and a 1OK resistor as a pull down. Wire one end of your switch to a 3V3 pin through the 1K resistor, wire the other end of the switch to any GPIO. Wire the GPIO end to GND...
by ame
Wed Dec 23, 2015 1:24 pm
Forum: Beginners
Topic: Bluetooth advice needed
Replies: 12
Views: 2364

Re: Bluetooth advice needed

I need some advice in regards to a project I have in mind. I want to be able to send data from my phone( which has android ) to my Raspberry Pi 2( which has Raspbian Jessie ). I have already bought a bluetooth dongle. What is the best way to do this? Is your Pi on your network? Best way would be to...
by ame
Wed Dec 23, 2015 6:51 am
Forum: General discussion
Topic: switch on raspberry pi help
Replies: 13
Views: 2573

Re: switch on raspberry pi help

Been done... https://www.adafruit.com/products/1620 https://www.adafruit.com/products/2379 Well, sure, you can buy one. Wheels...reinventing of...considered to be ill-advised. Well, conventional wisdom might say so, but sometimes it's worth breaking from the pack and trying something radical: https...
by ame
Wed Dec 23, 2015 6:10 am
Forum: General discussion
Topic: switch on raspberry pi help
Replies: 13
Views: 2573

Re: switch on raspberry pi help

Ok, then you just need to connect two wires to the 5V and GND pins on the GPIO, and don't use the micro USB connector.

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