Fix microscope box This wood box is for one of my LOMO Biolam’s in this case a Bresser rebranded one. The previous owner apparently had taped it shut and the tape doesn’t come off anymore.
I grinded the sides of the box and applied wood oil.
Box for a Microscope Micrometer This box is for my LOMO MOB-1-16x (ЛОМО МОБ-1-16x) microscope micrometer and a LOMO OM-O (ЛОМО ОМ-О) calibration slide. It’s a cheap wood box to which I added custom inserts.
Zoo Saarbrücken May 2024
All pictures taken with my Sony SLT-a77 with a Tamron SP AF 70-300 F/4-5.6 Di VC USD objective.
Landsweiler Reden April 2024
All pictures taken with my Canon EOS 20D with a Canon EF 4,0-5,6/35-80 III.
This was my first attempt with a Canon DSLR, as I normally use my Sony A77.
Recapping a HIKI TR1667A Multimeter
I got this older Hungarian made HIKI TR1667A desk multimeter I like to use on occasion. However I’m fairly suspicious of the capacitors inside, as I had another desk multimeter break due to a short circuiting electrolytic capacitor (I’ll make a repair post about that one some time). And the latter capacitors were still newer than the ones that are used in this thing, so I figured I’m going to replace them really quick to ensure that they don’t end up destroying ICs or the transformer.
Resetting Password on a CISCO Catalyst 2900XL
I needed to reset a password on an old CISCO Catalyst 2900XL, so here is the procedure as a reference:
The following should work at least on all older CISCO Catalyst series switches, in my case this is a very old 2900XL.
Hook up a serial terminal Hold the MODE button pressed until the switch is booted. Now something like this should come up:
C2900XL Boot Loader (C2900-HBOOT-M) Version 12.0(5.2)XU, MAINTENANCE INTERIM SOFTWARE Compiled Mon 17-Jul-00 18:19 by ayounes starting... Base ethernet MAC Address: 00:04:c1:e0:52:80 Xmodem file system is available. The system has been interrupted prior to initializing the flash filesystem. The following commands will initialize the flash filesystem, and finish loading the operating system software: flash_init load_helper boot switch: Type the flash_init command:
Stereomicroscope LED Lamp
I recently needed a LED light for a stereomicroscope of mine, so I quickly built one.
Basically takes a C8 inlet for 230V, transformer, rectifier and current limiter using an old TO-38 package transistor.
I also used an old AEG selenium rectifier (the red package) for fun.
The LEDs I put two 1206 SMD LEDs into series on a lab card.
Klosterruine Wörschweiler
All pictures taken with my Sony SLT-a77 with a Sony DT 18-55mm F3.5-5.6 SAM and Tamron SP AF 70-300 F/4-5.6 Di VC USD objective.
Please note that we had Sahara desert dust on this day, that’s why there is a slight yellow tint everywhere.
Quickie: Machining a 16mm Spigot
I needed a second 16mm spigot with a M8 thread for mounting a light on a universal clamp. Since I had some brass bar stock around I figured I just machine one quickly.
Result Mine (right) and the commercially available one (left).
Quickie: 24V AC & Unregulated DC Power Supply
Another quick build, this time I needed 24V AC for old DIN rail relays, as well as 24V DC for another DIN rail device. The solution? Both in one package. I only need a couple milliamps each AC and DC output so the small transformer is about just right for this.
Quickie: 24V 1.5A Automotive Power Supply
Just a quick project, a 1.5A 24VDC power supply with two ISO 4165 automotive auxiliary power sockets.
The front and back panel are 3D printed.