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CMX138A CTCSS encoder/decoder IC
The majority of digital radios today also works in analog and come with CTCSS. Still the majority of repeaters in the world are analog. I´m amazed to still sell well an analog...
Saturday, 14 March 2020 - 12:23
CMX138A CTCSS encoder/decoder IC
I used to use the MX465 but CML do not sale anymore. You can find plenty in Aliexpress but they are grey market. See this video to learn how they always have out of the...
Saturday, 14 March 2020 - 11:19
CMX138A CTCSS encoder/decoder IC
Perhaps because not all people are experienced or smart like you? I do my best to avoid asking questions on this forum. The result most of the time comes full of ironies and...
Saturday, 14 March 2020 - 11:12
CMX138A CTCSS encoder/decoder IC
Thank you all for the answers. CML answered today sending me these two pdf files. Those explanation will help me to go ahead with the tests. This IC is almost perfect...
Saturday, 14 March 2020 - 03:39
CMX138A CTCSS encoder/decoder IC
"As already noted, it looks pretty much like it is SPI!" Awneil, you made and I got your point now.  Without wanting to abuse such wisdom, could you tell me why if...
Friday, 13 March 2020 - 01:38
CMX138A CTCSS encoder/decoder IC
Hummm... The datasheet I downloaded don´t have these waveform. Looks like I got a kind of short version. Thanks!!!
Thursday, 12 March 2020 - 13:27
CMX138A CTCSS encoder/decoder IC
Well, I pretend to use more than only DTMF. This IC offers DCS, CTCSS encoding/decoding concurrent, pre and de enphasys and more. Last time I test DTMF decoding by software was a...
Thursday, 12 March 2020 - 13:25
Any better way to reorder an out of order nibble in a AVR port?
int8_t Remap_DTMF (uint8_t out_of_order) { int8_t result = -1; static const __flash uint8_t lut[] = { -1, 0x8, 0x4, 0xc, 0x2, 0x0, 0x6, -1, 0x1, 0x9, 0x5, -1, 0x3, 0xb,...
Wednesday, 13 February 2019 - 16:53
Any better way to reorder an out of order nibble in a AVR port?
I tried your code just adding a missing parenthesis and rearranging the numbers. Worked perfect reducing the code in 94 bytes! I´m only using numbers and # sign. Not using...
Sunday, 3 February 2019 - 18:00
Any better way to reorder an out of order nibble in a AVR port?
I´m using ATTINY2313 (2KB). The software was almost reaching the limit but is done. But I will review all the code and try to improve with the lessons of AVR Freaks. Of course if...
Sunday, 3 February 2019 - 14:22
Any better way to reorder an out of order nibble in a AVR port?
Thank you all for great suggestions!    I´m not a real programmer. From time to time I end up having to write some code and when I get stuck in something, this AVR...
Sunday, 3 February 2019 - 14:03
Help on UART interfering with I/O port pins (ATiny2313A)
Here is the schematic fixed. Disabling the UART the pin 3 goes low and the transmitter is disabled. That way I don´t need the PTT output anymore. I performed a test inside my...
Sunday, 18 September 2016 - 03:37