meta data for this page
  •  

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
gallery:start [2026/03/10 23:54] – [RP2350 delidded with sandpaper (2025-03-23)] rahixgallery:start [2026/03/11 00:21] (current) – Wet Lab rahix
Line 2: Line 2:
 Various pictures taken at FAFO :) Various pictures taken at FAFO :)
  
 +==== Interferometer Experiment for measuring STM piezo displacement (2026-01-18) ====
 +{{:gallery:2026-01-18-stm-interferometer.jpg?600|}}
 +
 +Laser interferometer setup ([[projects:optics:start|Optics project]]) for measuring the displacement of the piezos on our [[projects:stm|Scanning Tunneling Microscope]] (STM).
 +
 +Laser diode in the back, the piezo under test is in the front, and a camera to the left to record the interference fringes.
 +
 +==== Michelson Interferometer (2026-01-11) ====
 +{{:gallery:2026-01-11-interferometer.jpg?600|}}
 +
 +Basic michelson interferometer set up using our [[projects:optomech:start|3d-printed optomechanical components]].  To the far left, the fringe pattern is projected onto a piece of paper.
 ==== Pyrite under an SEM (2025-12-07) ==== ==== Pyrite under an SEM (2025-12-07) ====
 {{:gallery:2025-12-07-pyrite.png?600|}} {{:gallery:2025-12-07-pyrite.png?600|}}
Line 7: Line 18:
 See [[https://social.fa-fo.de/@fafo/115679126920409451]] for context. See [[https://social.fa-fo.de/@fafo/115679126920409451]] for context.
  
 +==== Work-in-progress wet lab (2025-11-09) ====
 +{{:gallery:2025-11-09-wip-lab.jpg?600|}}
 +
 +We managed to get our hands on some high-quality lab furniture.  This is a work-in-progress picture of the (not yet functional) wet lab at FAFO.
 +==== Scanning Tunneling Microscope (2025-06-15) ====
 +{{:projects:stm:pxl_20250920_212713202.jpg?600|}}
 +
 +Business end of our DIY [[projects:stm|Scanning Tunneling Microscope]] (STM). You can see the tungsten wire tip barely above a shard of DVD that we were trying to image.
 ==== RP2350 delidded with sandpaper (2025-03-23) ==== ==== RP2350 delidded with sandpaper (2025-03-23) ====
 {{:gallery:2025-03-23-rp2350.png?600|}} {{:gallery:2025-03-23-rp2350.png?600|}}
Line 12: Line 31:
 The strucures of the chip are in pretty bad shape from the sanding, but the marking and copyright year are clearly visible. The strucures of the chip are in pretty bad shape from the sanding, but the marking and copyright year are clearly visible.
  
-Photo was taken using our [[equipment:zeiss-dsm-962|equipment:zeiss-dsm-962]].+Photo was taken using our [[equipment:zeiss-dsm-962|Zeiss DSM 962]].
 ==== OSHW logo on a die (2024-10-10) ==== ==== OSHW logo on a die (2024-10-10) ====
 {{:gallery:2025-10-10-kenji-oshw.png?600|}} {{:gallery:2025-10-10-kenji-oshw.png?600|}}
  
 The open source hardware (OSHW) logo photographed on a bare die using our [[equipment:jeol-t330a|JEOL JSM-T330A]]. The open source hardware (OSHW) logo photographed on a bare die using our [[equipment:jeol-t330a|JEOL JSM-T330A]].
 +
 +==== Valve assembly of a JEOL JSM-T330A (2024-07-31) ====
 +{{:gallery:2024-07-31-valves.png?600|}}
 +
 +The valve block of our [[equipment:jeol-t330a|JEOL JSM-T330A (Kenji)]].  What you're seeing:
 +
 +  * The PCB on the left is the vacuum control board, sporting a Z80 microcontroller. This board is mysteriously undocumented so we largely reverse-engineered it here:
 +    * [[https://git.fa-fo.de/fafo/jeol-t330a/src/branch/main/modules/ph00524/ph00524.pdf|Reverse Engineered Schematic]] ([[https://git.fa-fo.de/fafo/jeol-t330a/src/branch/main/modules/ph00524|Sources]])
 +  * The left valve block right behind the PCB controls rough vacuum routing (vent, chamber, diffusion pump).  It has 4 positions which are checked using the light barriers on top.
 +  * The right valve block opens up the diffusion pump to the chamber once rough vacuum is reached.
 +    * For safety, there is a vacuum-driven clutch on this valve so it can only open when a rough vacuum is actually present.
 +  * On the right, the back side of the sample chamber is visible.
 +  * In front of the left valve block, two linear regulators are bolted to a metal plate.  These provide the vacuum controller board with 24V and 5V DC power.