Difference between revisions of "CEM DT-8852"
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== Hardware == | == Hardware == | ||
* [http://www.holtek.com/english/docum/uc/49x70.htm Holtek HT49R70A] microcontroller | |||
* [http://www.silabs.com/products/interface/usbtouart/Pages/usb-to-uart-bridge.aspx Silicon Labs CP2102] USB-serial interface | |||
== Photos == | == Photos == | ||
Revision as of 16:24, 4 June 2013
 | |
| Status | in progress |
|---|---|
| Connectivity | USB |
| Frequency range | 31.5Hz - 8kHz |
| Measurement range (A) | 30dB - 130dB |
| Resolution | 0.1dB |
| Accuracy (94dB@1kHz) | 1.4dB |
| Frequency weighting | A, C |
| Time weighting | F, S |
| Standards | IEC 61672-1 Class 2 |
| Website | cem-instruments.com |
The CEM DT-8852 is an IEC 61672-1 class 2 compliant sound level meter with USB connectivity.
See CEM DT-8852/Info for more details (such as lsusb -vvv output) about the device.
Hardware
- Holtek HT49R70A microcontroller
- Silicon Labs CP2102 USB-serial interface
Photos
Device, front
Device, back
Device, side
PCB
PCB: keypad and LCD
PCB detail
PCB detail
Microcontroller
CP2102 USB interface chip
Protocol
TODO.
Resources
TODO.