From e2c5f2e874b46c95fd55b167b40f088b6949994c Mon Sep 17 00:00:00 2001 From: Bernd Herzog Date: Mon, 15 May 2023 13:35:54 +0200 Subject: [PATCH] Created Spectrum Painter (markdown) --- Spectrum-Painter.md | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Spectrum-Painter.md diff --git a/Spectrum-Painter.md b/Spectrum-Painter.md new file mode 100644 index 0000000..b3e99a5 --- /dev/null +++ b/Spectrum-Painter.md @@ -0,0 +1,29 @@ +The Spectrum Painter app allows to "paint" an image or text in a way that it appears on the waterfall view. + +### Options +* Center frequency +* VGA (Gain) +* Amplifier +* Loop +* Bandwidth + * Note that the default bandwidth of 8k5 Hz is too low in most cases (eg. when viewing multiple MHz). +* Duration of transmission +* Pause between transmissions when loop is active + +### Images +* Place 24 bit .BMP files on the sd card in the folder SPECTRUM + * 16 and 32 bit .BMP should work as well, but are not testet. +* The resolution should be quite high for a good result. A width of 2048 pixels is not a problem. + * Use a power of 2 for the width for optimal result. (eg. 512 / 1024 / 2048 / ...) + + +![SCR_0000](https://github.com/eried/portapack-mayhem/assets/13151053/4f3ecb71-eb8f-4231-a0a5-21f593c43b8b) + +![grafik](https://github.com/eried/portapack-mayhem/assets/13151053/0facc180-5474-4093-98a9-a983f8b93f43) + +### Text +* Messages up to 300 characters are supported + +![SCR_0003](https://github.com/eried/portapack-mayhem/assets/13151053/3ea539e7-baf7-4a77-8415-3aabe9bc6cea) + +![Screenshot](https://github.com/eried/portapack-mayhem/assets/13151053/9b322883-6064-4b77-9a40-dcdf9098ee06)