Gemma and tv-b-gone?

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Birdnerd
 
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Gemma and tv-b-gone?

Post by Birdnerd »

Hi there! I'm pretty new to electronics, and I'm ready for my second project. Before I start, I'd like to know if it's possible to use Gemma in place of the flora for the tv-b-gone project? Thanks!!

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adafruit_support_bill
 
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Re: Gemma and tv-b-gone?

Post by adafruit_support_bill »

The original TV-B-Gone was designed around the ATTiny85, so it should be possible to make it work on a Gemma.

Birdnerd
 
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Re: Gemma and tv-b-gone?

Post by Birdnerd »

Should be possible, ok, I like that answer ;-) Are there any hangups you think I might run into?

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adafruit_support_bill
 
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Re: Gemma and tv-b-gone?

Post by adafruit_support_bill »

Memory would be the biggest concern. The original TV-B-Gone uses a bare chip (no bootloader). Might need to re-assign some pins as well.

Birdnerd
 
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Re: Gemma and tv-b-gone?

Post by Birdnerd »

Ok, I think I can work with that. Thanks so much!

ks09aa
 
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Joined: Wed Nov 27, 2013 3:47 pm

Re: Gemma and tv-b-gone?

Post by ks09aa »

Hello! Sorry to but-in, can i ask a quick question?

I'm trying to do the same thing on a trinket i'm hoping to purchase, that is to say i'm trying to make it a TV-B-gone device. The trinket uses the same ATTiny85 as the TV-Bgone, and also features an 8Hz oscillator just like the TV-b gone does.

Is this proposal viable? And is it as simple as using the firmware Adafruit provides for the tV-B-gone, as they are the same chip?

Also, can i ask Birdnerd if you succeeded in your project?

Thanks!

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adafruit_support_bill
 
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Re: Gemma and tv-b-gone?

Post by adafruit_support_bill »

It should be possible to do. The possible issues are noted in my previous post. Worst-case, if memory is an issue, you could overwrite the bootloader.

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paulosophy
 
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Re: Gemma and tv-b-gone?

Post by paulosophy »

Hopefully I'm not necro-posting... I'm interested in setting up the TV-B-Gone on the Trinket as well. I'm using a 3.3V trinket, since I also wanted an Electret microphone attached. But it looks like the IR sensor needs 5V:
https://learn.adafruit.com/ir-sensor/te ... -ir-sensor

Is it possible to turn 3.3V into 5V? I realize I also have access to Vin, but my battery is 3.7V
https://www.adafruit.com/products/1578

I've started looking into making circuits to do this, but I don't really understand what I'm looking at:
http://www.electroschematics.com/8811/3 ... converter/
http://electronics.stackexchange.com/qu ... igital-i-o

Can anyone point me in a noob-friendly direction?

Edit: Something like this is what I was looking for!
http://www.digikey.com/catalog/en/partg ... o-5v/18775
(I think)
Anyone have thoughts on using that?
Last edited by paulosophy on Sat Jun 13, 2015 11:57 am, edited 1 time in total.

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adafruit_support_bill
 
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Re: Gemma and tv-b-gone?

Post by adafruit_support_bill »

Yes, it is possible to turn 3v into 5v with something like this. - https://www.adafruit.com/products/1903

But, it should not be necessary in this case because the sensor will run on anything between 2.5v and 5.5v.
http://www.adafruit.com/datasheets/tsop382.pdf

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paulosophy
 
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Re: Gemma and tv-b-gone?

Post by paulosophy »

Ohhhhh hmmmmm
I was going off this tutorial:
http://www.ladyada.net/wiki/tutorials/l ... rs/ir.html
Which said:
"We will use 4xAA 1.5V batteries so that the voltage powering the sensor is about 6V. 2 batteries (3V) is too little. You can also get 5V from a microcontroller like an Arduino if you have one around. "
That tutorial uses: PNA4602

But it looks like you're right! The one I bought:
TSOP38238
https://www.adafruit.com/products/157
Is fine! "Runs at 3V to 5V so it's great for any microcontroller"

One of the hardest things for me still is keeping track of component numbers and reading data sheets. Especially if a guide uses something different than what I bought: I have a super rough time knowing how to translate information from the data sheet to the tutorial and even knowing if it'll work.

My point being: I couldn't do this without the incredible community here at Adafruit. So THANK YOU!! For your fast, helpful responses. You really make everything I want to do possible.

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