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2014-08-15
, 18:31
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Posts: 562 |
Thanked: 2,744 times |
Joined on Dec 2013
@ Espoo, Finland
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#2
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Those who follow me on twitter may have seen this short video;
https://www.youtube.com/watch?v=xTO2Q3jX8Z8
It is simply RRD-102 V2.0 board attached to MyHalf breakout board. The board contains RDA5807M chip and 32.768kHz crystal and passives for bypass and antenna.
MyHalf bare PCB's available through OSHPark https://oshpark.com/shared_projects/6TWMNB35
RRD-102 Boards are available from ebay, aliexpress e.g.
http://www.aliexpress.com/item/Free-...988842002.html
Datasheet can be found here http://www.seeedstudio.com/wiki/imag...sheet_v1.1.pdf
Topview of breakout board
Simply connect the SDA(=DATA) and SCL(=CLOCK) to I2C bus which is converted to 3.3V levels.
3.5mm audiojack to L/R out and GND
3.3V from phone to VDD
Antenna (piece of wire) goes to FM pin
Leave N.C. and RCK pins not connected.
For reference 3.5mm plug contacts:
Sourcecode in my github https://github.com/kimmoli/fmreceiver
This contains minimalist UI with tuning and RDS station name and radio-text display:
For the transmitter side, i did order some KT0803L chips - currently waiting them to arrive:
datasheet http://radio-z.ucoz.lv/kt_0803/KT0803L_V1.3.pdf
To get the audio from FM receiver (and to FM transmitter) to jolla audio-system is under planning. More about that when it is time for that.
Last edited by kimmoli; 2014-08-15 at 18:59.
https://www.youtube.com/watch?v=xTO2Q3jX8Z8
It is simply RRD-102 V2.0 board attached to MyHalf breakout board. The board contains RDA5807M chip and 32.768kHz crystal and passives for bypass and antenna.
MyHalf bare PCB's available through OSHPark https://oshpark.com/shared_projects/6TWMNB35
RRD-102 Boards are available from ebay, aliexpress e.g.
http://www.aliexpress.com/item/Free-...988842002.html
Datasheet can be found here http://www.seeedstudio.com/wiki/imag...sheet_v1.1.pdf
Topview of breakout board
Simply connect the SDA(=DATA) and SCL(=CLOCK) to I2C bus which is converted to 3.3V levels.
3.5mm audiojack to L/R out and GND
3.3V from phone to VDD
Antenna (piece of wire) goes to FM pin
Leave N.C. and RCK pins not connected.
For reference 3.5mm plug contacts:
Sourcecode in my github https://github.com/kimmoli/fmreceiver
This contains minimalist UI with tuning and RDS station name and radio-text display:
For the transmitter side, i did order some KT0803L chips - currently waiting them to arrive:
datasheet http://radio-z.ucoz.lv/kt_0803/KT0803L_V1.3.pdf
To get the audio from FM receiver (and to FM transmitter) to jolla audio-system is under planning. More about that when it is time for that.
__________________
TOH ideas, concepts and creations since 2013 toholed tohuart toheink Heebo tohIRi i2ctool tohmm LeTOH FMTOH
TOH ideas, concepts and creations since 2013 toholed tohuart toheink Heebo tohIRi i2ctool tohmm LeTOH FMTOH
Last edited by kimmoli; 2014-08-15 at 18:59.
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2014-08-15
, 20:28
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Posts: 5,028 |
Thanked: 8,613 times |
Joined on Mar 2011
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#6
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It's a pity that you don't do things for (far superior) N900. You got clever ideas 
__________________
N900's aluminum backcover / body replacement
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N900's HDMI-Out
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Camera cover MOD
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Measure battery's real capacity on-device
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TrueCrypt 7.1 | ereswap | bnf
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Hardware's mods research is costly. To support my work, please consider donating. Thank You!
N900's aluminum backcover / body replacement
-
N900's HDMI-Out
-
Camera cover MOD
-
Measure battery's real capacity on-device
-
TrueCrypt 7.1 | ereswap | bnf
-
Hardware's mods research is costly. To support my work, please consider donating. Thank You!
| The Following 4 Users Say Thank You to Estel For This Useful Post: | ||
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2014-08-15
, 21:19
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Posts: 86 |
Thanked: 115 times |
Joined on Feb 2014
@ Spain
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#7
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Great!! Good work!! I'm very interesting on this TOH.
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2014-08-16
, 03:06
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Posts: 1,335 |
Thanked: 3,931 times |
Joined on Jul 2010
@ Brittany, France
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#8
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I'm in.
(And about what Estel said, I do hope you'll do things for the Neo900! N900 is indeed the King, but it's becoming a bit slowish for nowaday's standards.
)
(And about what Estel said, I do hope you'll do things for the Neo900! N900 is indeed the King, but it's becoming a bit slowish for nowaday's standards.
)
| The Following User Says Thank You to Kabouik For This Useful Post: | ||
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2014-08-16
, 08:01
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Moderator |
Posts: 5,320 |
Thanked: 4,464 times |
Joined on Oct 2009
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#9
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I'd like to see a bunch of these TOH's merged into one uber "kitchen-sink/swiss-army-knife" TOH ;-P
No easy task; I imagine it'd take many iterations of miniaturisation, plus the I2C BUS may start to get saturated.
No easy task; I imagine it'd take many iterations of miniaturisation, plus the I2C BUS may start to get saturated.
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2014-08-16
, 16:37
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Posts: 562 |
Thanked: 2,744 times |
Joined on Dec 2013
@ Espoo, Finland
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#10
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Originally Posted by Estel
It might be due that fact i have had no pleasure to own a N900.
It's a pity that you don't do things for (far superior) N900. You got clever ideas
Originally Posted by jalyst
Yep. Getting started with one feature/TOH, maybe next will already combine few things.
... "kitchen-sink/swiss-army-knife" TOH ...
FAQ:
Q: Are you going to make this TOH for sale also or just to make a tutorial?
A: No decision made yet.
TOH ideas, concepts and creations since 2013 toholed tohuart toheink Heebo tohIRi i2ctool tohmm LeTOH FMTOH
Last edited by kimmoli; 2014-08-21 at 06:17.