Electronics Night 2nd March 2017

#1

Who’s about tonight?
I’ve got some bits to do on the tool control but will have the normal bits and bobs with me…

Courty

#2

IMG_20161205_142730.jpg4160×3088 2.72 MB

I’ll be there, most likely working on this thing!

Iain

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#3

I will!

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#4

I’m coming down, bringing my shower for you to have a look at and hopefully discussing the possibility of hacking it to work the way I want it to!

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#5

Hopefully coming.

I got the circuit diagram for:

But it’s all Greek to me.

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#6

Should be there, its been a while. I’ve got the esp8266 dev board running an MQTT client so I can turn a servo. Now to get it running on a esp8266

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#7

Might (will) need some help working out where to connect my Bluetooth boards output so it can go threw the pot volume and on/off switch.

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#8

The Top side of C31 !

Courty

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#9

Agreed.

And Paul make sure it is a line level output from the bluetooth

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#10

Thanks for the tip.

I had to google what that meant…
It’s got an intergrated amp on the Bluetooth card. So I think from my brief google I’m guessing that means it’s at line level. He says with doubt in his voice.

Btw This is a pocket radio not the valve beast from Saturday.

#11

normally line level is without the Amp but you should be able to turn the amp down or add a resistor to the line to make it match

Courty

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#12

Will the resistor not get toasty?

#13

Not unless the Bluetooth Amp is a spinal tap special and goes up to 11

Courty

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#14

Me and this steep learning curve are going to have a chat. It’s going to tell me to be patient and I’m going to nod quietly.

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#15

@boldaslove This is the way I was trying to explain to you yesterday, the idea is , when you switch the switch to select the bluetooth , will interrupt the radio audio and will turn on the bluetooth.

Yes, the radio will stay on, but the bluetooth will stay off when you switch it off.

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#16

thanks a lot Andrea!
ill have a play around with that when i get a chance.

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#17

@RichM - I looked up the current output of the Arduino FTDI chip and for the real ones (not the Chinese clones) its ~50ma @3.3v

the 800 series GSM board recommends allowing for peaks of 1000ma during Tx ! That would explain the odd behaviour…

Courty

#18

Indeed. I’ve just this minute got the right combination of flashing lights by using that board you lent me and a 12v wall wart supply.

Now to see if it’s actually working…

3 Likes
#19

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Yep!

Arduino sketch chops the message payload out and converts to upper case. Sorted!

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#20

Excellent ! - now you’ve cracked it i’ll set up mine :smile:

Courty