Commit 5bfc4219 authored by Bernd-Christian Renner's avatar Bernd-Christian Renner
Browse files

mc

parent 5a92b269
......@@ -31,10 +31,10 @@ Click on "File -> CAM Processor ..." in the PCB Window of Eagle.
These steps have to be repeated for all boards you intend to build. The created ZIP files have to be sent to your PCB manufacturer.
![](images/hardware_manufactoring/figure1.png)
![](images/hardware_manufacturing/figure1.png)
![](images/hardware_manufactoring/figure2.png)
![](images/hardware_manufacturing/figure2.png)
### Verify files
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......@@ -11,17 +11,19 @@ The hydrophone itself is connected to the transmitter board. It must *not* be co
## Mainboard (MB)
<center>
![](/images/hardware_concept/mb.svg)
</center>
The mainboard hosts the microcontroller (STM32F446RET), which performs the signal processing and controls the other boards.
All circuitry of the modem is powered by a single 12V supply, which must be connected to the mainboard by the corresponding connector.
This connector features a polarity protection.
The microcontroller and all logic uses a 3.3V DC supply, which is generated on-board by a dedicated, low-noise DCDC converter.
The microcontroller and all logic use a 3.3V DC supply, which is generated on-board by a dedicated, low-noise DCDC converter.
This 3.3V rail is fed to the 31-pin connector and is used by the other boards.
A serial and control port is available via pin headers and on the 17-pin connector. All lines are optically isolated and required an external power supply.
A serial and control port is available via pin headers and on the 17-pin connector. All lines are optically isolated and require an external power supply.
We recommend a 3.3V supply and 3.3V logic levels; however, the isolator has a maximum rating of 5.5V.
The two control lines are reserved for future use.
The serial line enables communication with the modem for configuration purposes and packet sending and receiving.
......@@ -35,7 +37,9 @@ Finally, six LEDs indicate the status of the modem.
## Receiver (RX)
<center>
![](/images/hardware_concept/receiver.svg)
</center>
The receiver board takes the analog signal from the internal bus of the 31-pin connector and feeds it through the following analog stages:
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# Introduction
This is the documentation of the ahoi acoustic modem. It includes a description of the hardware, how to use it, and what equipment you need to get going. It also entails tutorials that explain the basic functionality, features, and available software tools step by step. The ahoi acoustic modem is an open-source device, and this documentation will support you to build your own, to set it in operation, and to use it successfully.
This is the documentation of the ahoi acoustic modem. It includes a description of the hardware, how to use it, and what equipment you need to get going. It also entails tutorials that explain, step by step, the basic functionality, features, and available software tools. The ahoi acoustic modem is an open-source device, and this documentation will support you to build your own, to set it in operation, and to use it successfully.
## Hardware
The hardware comprises a stack of three boards: a mainboard with a microcontroller (blue), a receiver (green), and a transmitter (red). All boards follow a trade-off between high integration to achieve a small overall footprint and easy assembly by hand. We rely on COTS components exclusively, which were easily sourceable at the time of development. Component lists are provided along with schematics.
The hardware comprises a stack of three boards: a mainboard with a microcontroller (blue), a receiver (green), and a transmitter (red). All boards follow a trade-off between high integration to achieve a small overall footprint and easy assembly by hand. We rely on COTS components exclusively, which were easily sourceable at the time of development. Component lists are provided along with schematics.
<center>
![ahoi acoustic modem](/images/intro/modem_hydro_euro.png)
</center>
###General properties
<center>
......
......@@ -33,8 +33,8 @@ theme:
language: en
palette:
scheme: preference
primary: pink
accent: cyan
primary: cyan
accent: pink
font:
text: Roboto Slab
code: Roboto Mono
......@@ -44,6 +44,7 @@ copyright: Copyright &copy; 2021 ahoi crew
markdown_extensions:
- footnotes
- admonition
- attr_list
- pymdownx.inlinehilite
plugins:
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