Raspberry Pi the new simple SMALL PC

vincent007 · Aug 22, 2014

Anyone use raspberry pi as a universal remote controller?
Just got my model B+ and the IR LED.
Based on this article, http://www.stavros.io/posts/how-turn-your-raspberry-pi-infrared-remote-control, the voltage difference is OK (IO port 3.3V vs IR LED 1.6V), but I just want to confirm if I don't need to add any resistor.

Also, how to connect the IR LED to the IO ports, as both are male.
Is it this cable?

KardBoard · Aug 22, 2014

you need female to female cable as your pic to connect the IR led.if you are using breadboard use female to male cable.bout the resistor not sure cant figure out as there is no schematic.

**RaspberryPi IR Schematic for LIRC - alexba.in
if this is the project you are doing then yes for the resistor.

some suggestion
https://learn.adafruit.com/using-an-ir-remote-with-a-raspberry-pi-media-center/overview

hope it helps

vincent007 · Aug 23, 2014

Don't think I will use breadboard as yet coz I just want to try first. I don't really know how to read the schematic but from the link you give, it seems that a transistor and a 10ohm resistor are needed? What is the transistor for? Then if I were to use the female-female cable, how do I connect them together? Create a serial connection from rasp pi IO port - ff cable - resistor - ff cable - transistor - ff cable - IR LED?

Btw the adafruit link is for IR receiver/sensor. What I want to do is IR transmitter.

KardBoard · Aug 24, 2014

IR transmitter.

Erik's Data Dump: Controlling a receiver using an raspberry pi and an ir transmitter

maybe this is e project u talking.

greenchilli · Sep 23, 2014

Anyone knows where I can still buy the older Raspberry pi Rev B (not the B+)? Thanks

KardBoard · Sep 27, 2014

greenchilli said:
Anyone knows where I can still buy the older Raspberry pi Rev B (not the B+)? Thanks

just wondering why u want the old version?due to compatibility?maybe sim lim tower got.the 3rd storey shop.the shop start with F if im not wrong.

greenchilli · Sep 27, 2014

KardBoard said:
just wondering why u want the old version?due to compatibility?maybe sim lim tower got.the 3rd storey shop.the shop start with F if im not wrong.

Using it for mission critical application. My main Raspberry pi is Rev B with config stored in the SDcard. To failover to backup I want to be able to just pull out the SDcard and plug to the secondary unit.

New version now comes with micro-sd slot hence not suitable for my purpose.

KardBoard · Sep 30, 2014

ou.that your reason.hope u able to find it.maybe u can try call element14 n ask them which local shop still got sell the model B.

wtfh4x · Sep 30, 2014

Why can't you just get a microSD card and use an adaptor to put into the older Pi, then when you want to change over just take out the adaptor?

davidktw · Sep 30, 2014

wtfh4x said:
Why can't you just get a microSD card and use an adaptor to put into the older Pi, then when you want to change over just take out the adaptor?

Maybe one should just store the configuration in a tiny USB thumb drive? Why should everything be stored inside the SDCARD?

A better approach is shift your root filesystem to a USB drive and only have the boot partition on the SDCARD/Micro SDCARD

Feel free to google more articles on this matter or just read off https://samhobbs.co.uk/2013/10/speed-up-your-pi-by-booting-to-a-usb-flash-drive

It has been in the common booting process of Linux to boot up with a boot image but running the rootfs elsewhere. That's how the Linux Initial RAM disk file comes about.