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SOLD OUT, no longer available: For Sale: WTV020-SD-20SS MP3 sound modules (with 1GB memory card). $20 USD. Price includes postal shipping to a USA destination. International orders must add +$6 USD. PayPal payments only. To purchase one please contact me by forum PM (this will confirm you are a registered at rc-cam.com or 9xforum.com) to obtain my PayPal account information. BTW, if you contact me from 9xforums.com then send the PM to member name thomas9x. Please no emails! These are the "new" V1.1 sound module, but have the special "no-delay" MP3 chip needed for the 9x voice mod. The module and 1GB SD memory card have been tested in my 9x transmitter (using the popular 9x voice mod). You will find some .wav files on the SD card; delete them before copying the sound files assigned to your 9x software version. Installing the module in a 9x requires additional electronic components; Full details are published here: http://9xforums.com/forum/viewtopic.php?f=5&t=948
The DiY R/C community has been doing some fabulous things with the low cost Turnigy/FlySky 9X R/C transmitter. They continue to make improvements and add useful features. It did not take long for a talented 9X developer to add a sophisticated voice (speech) feature. So of course I had to jump in and make mine talk too. Here's a video example of the 9X voice feature that I found on YouTube: The voice feature is based on a very low cost MP3 sound module from China. The speech segments are stored on a SD memory card. All the details to the 9X voice mod are published here: http://9xforums.com/...c.php?f=5&t=948 EDIT/UPDATE: I have some new MP3 Sound modules (with SD memory card) that can be used in the 9x voice project explained at the 9xforums. The special offer is posted here: If you are not familiar with the various efforts on modifying the 9x transmitter then I suggest you review my earlier 9X hack blog. This will allow you to see the sort of things you should do before adding the voice feature: http://www.rc-cam.co...827-er9x-hacks/ Now that all the background details are out of the way we can talk about the custom voice board (which is named Speak-9x) that was created for my 9X transmitter. First, here are some things I wanted it to do. Voice interface (based on MikeB's published information) LM386 Audio Amp (for higher audio volume) Haptic Motor Driver (alert vibrator) LED Backlight Driver (with constant current source) Piezo emulation to support a variety of alert tones for playback on the voice speaker (and eliminate the stock buzzer) After the schematic's details were finalized a custom PCB was designed. The final chosen layout was a three board set (main board plus two optional feature boards). The main board is designed to mount on top of the 9X's CPU board in the lower left corner of the case. Here's the simulated 3D view of the board set: After the CAD files were finished (early August) a small batch of PCB's were ordered. Yesterday FedEx delivered them and in short time my R/C Tx was talking to me. And it sounds awesome. Now for some photos. This is the Speak-9X board installed in the 9X transmitter. You can see that the memory card can be removed/installed through a slot that was added to the 9X's plastic case. .