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by ahull
Sun Feb 26, 2017 11:12 am
Forum: General discussion
Topic: Sometimes hang after reset, touch WKUP to start..?
Replies: 3
Views: 28

Re: Sometimes hang after reset, touch WKUP to start..?

I have seen similar behaviour when the RTC clock crystal is not oscillating, touching the RTC clock pins was enough to get things moving, is the main oscillator running, is the rtc oscillator running? Have you set something in the RTC settings that is putting the device to sleep?
by ahull
Tue Feb 21, 2017 10:24 pm
Forum: Off topic
Topic: Yet another ...yet another "Pi killer"
Replies: 8
Views: 122

Re: Yet another ...yet another "Pi killer"

I think they missed their target slightly with the microbit. http://www.bbc.co.uk/mediacentre/mediapacks/microbit/specs It is not bad, but.... I think they could have managed more bang for their bucks, and maybe even a small TFT instead of the led array. EDIT: I would also be interested to see how w...
by ahull
Tue Feb 21, 2017 4:55 pm
Forum: Off topic
Topic: DIY Oscilloscopes - List and Discussions
Replies: 20
Views: 1011

Re: DIY Oscilloscopes - List and Discussions

Today, I semi-finished DIY clone of simple "Xprotolab Plain", by "Gabotronics (list code M-10). Pictures (not very good quality for now): http://bildites.lv/a/69nvgudn#zc9vn6ch it is low bandwidth device. I kind of like its Windows host software. I'm not seeing your images.. just a b...
by ahull
Tue Feb 21, 2017 1:23 am
Forum: Off topic
Topic: Yet another ...yet another "Pi killer"
Replies: 8
Views: 122

Yet another ...yet another "Pi killer"

Another blue board from the Banana Pi tree. Surely they should be yellow. :D https://www.board-db.org/news/2017/02/20/iot-sinovoip-banana-pi-m2-magic-wifi-ble-4-allwinner-a33/ https://www.board-db.org/news/wp-content/uploads/2017/02/157-600x560.jpg http://forum.banana-pi.org/t/banana-pi-bpi-m2-magic...
by ahull
Mon Feb 20, 2017 12:33 pm
Forum: Off topic
Topic: Generic board design questions
Replies: 6
Views: 79

Re: Generic board design questions

i'm also sometimes wondering if it would be useful to make a maple mini like board using a 64 pin mcu then you've got more features, but to not make it too big, which pins will you break out? maybe try to give access to 1 full 16 pin port, and as many as possible peripherals? a near maple mini size...
by ahull
Sun Feb 19, 2017 8:13 pm
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 593
Views: 31339

Re: $10 O-Scope revisited

Nice! :D

BTW which is closer to the truth? 3384Hz or 3400Hz ? having said that... 99.529% accuracy 'aint bad for us amateurs. ;)
by ahull
Sun Feb 19, 2017 10:53 am
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 35
Views: 471

Re: Rogers postbag - FM radio band transmitter

You can use a broadly similar method to get i2c on the Pi -> https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c Accessing the i2c eerom on those FM transmitter boards might be easier with a suitable clip on adapter. Search ebay for "SOIC8 SOP8 Flash Chip IC Te...
by ahull
Sat Feb 18, 2017 11:16 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 35
Views: 471

Re: Rogers postbag - FM radio band transmitter

Is this of any use -> http://www.kh-gps.de/fm_china_at.pdf BTW this PDF appears to be for a related receiver rather than transmitter. Another receiver (note receiver not transmitter) here -> http://www.ebay.co.uk/itm/87-108MHz-Digital-Stereo-FM-Radio-Receiver-Module-with-Serial-Control-DSP-and-P/142...
by ahull
Sat Feb 18, 2017 9:51 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 35
Views: 471

Re: Rogers postbag - FM radio band transmitter

From the pictures the mysterious pin "M" goes to pin 24 on the mystery 48 pin MCU, and since the adjacent pins drive the LCD (and are thus probably GPIO) I suspect it is an I/O pin of some sort.
by ahull
Sat Feb 18, 2017 9:22 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 35
Views: 471

Re: Rogers postbag - FM radio band transmitter

I think you should be able to talk to the chip, but you may need to 'cope the pins to see what is going on. I suspect that the micro-controller on the board may be talking at the same time as you are trying, so you may need to hold the micro-controller in reset while you speak to the QN8027

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