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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
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 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|}}
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 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|}}
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 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.