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| To: | [email protected] |
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| Subject: | LF: Portable VLF/ULF recording system with PPS+NMEA |
| From: | DK7FC <[email protected]> |
| Date: | Tue, 05 Jul 2016 16:45:52 +0200 |
| Cc: | Renato Romero <[email protected]> |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> <CAA8k23TGuNuOZcnJA42=EDxZgHMAVNeq9SM7=UhvTz6Noqa_FA@mail.gmail.com> <[email protected]> <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 |
Hi all, I've completed my portable VLF/ULF(audio) recording system.See: https://dl.dropboxusercontent.com/u/19882028/ULF/VLFesULF%20portable%20recording.jpg The system consists out of a: - Raspberry Pi 2B - DC/DC converter with a 5.0V output (80% efficiency) - 7 Ah lead acid battery - Stereo input soundcard - 32 GB USB stick - NEO-6M GPS module (including antenna) - (shut down button) - (switch for starting/stopping a recording)The latest add-on, the GPS module now allows to record 1PPS impulses and NMEA data for most accurate and glitch-free(corrected) recordings, absolute timestamps as well as location data. The recording is stred as a wav file to the USB stick directly.It consumes 160 mA at 12V during a record. With the battery it should be no problem to record for nearly 2 days. Future ULF reception tests can now be done with this improved technique... 73, Stefan |
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