Project 'muon-hodoscope/back_bone' was moved to 'muon-hodoscope/hardware/back_bone'. Please update any links and bookmarks that may still have the old path.
- Oct 22, 2024
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Carsten Presser authored
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- Mar 15, 2024
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Carsten Presser authored
One of the opamp-units used for the 2.1V clamp-voltage was mirrored, resulting in the supply to be connected with reverse polarity. On top of that, minor documentation stuff has been improved * Add MPNs for some more parts * Add device-marking field for more parts * Fix bug in i2c-xor table * +2.5V label actually should be -2.5V * Update silkscreen label
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- Feb 27, 2024
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Carsten Presser authored
The i2c-scanner Arduino sketch was extended to be used for a production test. It not only scans the i2c bus, it also checks if the DACs are presend and configures them with a set voltage. Additionally, it tries to calculate the i2c-address-translation XOR value with the help of an extra board that has a single i2c-eeprom with a known address.
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- Jan 16, 2024
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Carsten Presser authored
It looks like some designator changes in the schematic. I am not sure why those are not part of a previous commit. The board changes are the result of a new DRC run. One error (footprint-type) was changed to warning.
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Carsten Presser authored
For the upper nibble of the translation the recommended values in the datasheet are 976/102kOhm for the 0.09374V/V divider option. The 976k resistor was not available. So the divider was changed to the values of 1000k/104k. That is more accurate an also neeeds one less item in the BOM.
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- Dec 20, 2023
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
Exchange the negative voltage supply with one that can deliver more current and has less noise. Split power-planes to have a 'noisy' plane below the inverting switcher. Use a comparator for driving the LED-Testpulses Replace 50R-Star termination of testpulses with a 8:8 mux Rename channels (0..7 instead of 1..8) Add polyfuses for the frontend-supplys Fix i2c address translation to allow chaining of 8 backbones Add SMT testpoints for easier debugging Add EEPROM to store calibration values or ID information
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- Apr 03, 2023
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Carsten Presser authored
The values on the .kicad_pcb file were not updated in commit b5a4a6. Thus tools like InteractiveHtmlBOM did output the old, outdated values. This commit fixes that.
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- Mar 09, 2023
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Carsten Presser authored
The calculation was wrong. Instead of 5.6R a 39R resistor is needed to split 1:8. A textbox with calculation infos has been added.
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- Mar 01, 2023
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Carsten Presser authored
Optimize for less 2MHz coupling into the +5V line Solve all of the new KiCadv7 DRC errors. Some DRC warnings are still present.
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- Feb 21, 2023
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
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- Feb 17, 2023
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Carsten Presser authored
It was a misconception that the DAC outputs 2.048V. The circuit already has changed in previous commits, but the name of the Hierarchical label was left untouched. This commit fixes that.
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- Feb 16, 2023
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Carsten Presser authored
According to the datasheet, the feedback resistors should be greater than 50kOhm.
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Carsten Presser authored
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- Feb 15, 2023
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Carsten Presser authored
The cap was missing. Change default silk text to 0.8mm 0.12mm thicknes
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Carsten Presser authored
Voltage divider for 5V LDO is just wrong. 1.6k/510R works. (4.96V) Swap R91/R88 values Remove Logos from BOM Recalculate feedback resistors for Vbias generation, increase their values by x10 to limit the current wasted in those resistors. Change value of D87 to limit LED-Current All of those changes do _not_ change the PCB, only the BOM.
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- Jan 16, 2023
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Carsten Presser authored
Some nets on the inner layer looked ugly as a result of the replicate-layout plugin. That has been fixed. Some stitching vias have been added. A board-revision was added to the silkscreen.
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
Add Voltage rating to critical capacitors Add low-pass filtering caps on some op-amp inputs Use PGOOD signal of LM2776 instead of the individual power LEDs Set values of feedback-voltage-dividers on LM2776 Change termination on the TestPulse signal Move routing of TestPulse signal to Bot go get 50R impedance Add more stitching vias Exclude logos from BOM
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- Dec 23, 2022
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Carsten Presser authored
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Carsten Presser authored
The front-end-connectors were oriented in the wrong way. They needed to be rotated by 180 degree. The connectors also got re-numbered, so J101 is sued for Channel1 Missing 3D-Models were added.
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- Dec 22, 2022
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Carsten Presser authored
Also move a few silkscreen items
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Carsten Presser authored
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Carsten Presser authored
add teh diff and ibom stages Remove the [ -f *.kicad_ ] commands, they don't work if there are multiple files that match the glob operator.
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Carsten Presser authored
There is a bug in the kicad ERC engine, thus two warnings had to be excluded since they cannot be fixed.
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Carsten Presser authored
Use geographical re-annotate.
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- Dec 21, 2022
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Carsten Presser authored
Mark the channels Add table of channel-mapping Add auxilliary mounting holes Add Logos and PCB art
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- Dec 16, 2022
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
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Carsten Presser authored
Previously a skeleton schematic and layout was in this repository. Now the schematic is 'finished' and layout is done. The board has not been reviewed, so some changes are still expected. Things that are 'done': * Mechanical connectors & layout * I²C address-space * Power-supply * SiPM-Bias-Voltage generation * LED-Testpulse amplifiers Stuff that might need improvement * Silkscreen labels * Testpulse input & output
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- Dec 07, 2022
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Carsten Presser authored
Remove whitespaces in project files Replace board outline with rectangle Fix silkscreen DRC errors Remove paste from Pogo-Landing-Pads
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