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.
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.
Quickie: New paint for a Karl Klein DNG 6-22,5
I recently got this Karl Klein DNG 6-22,5 blower (22 m3/min) I want to use for dust extraction. Unfortunately the seller spray painted the whole thing with zinc spray w/o telling or asking me.
This is what I got out of the box: It appears that they at least stripped off parts of the old paint (maybe even sand blasted it?) but like I don’t like this look. So I gave it a quick new paint job, first I removed some of the zinc spray where it was not sticking properly.
Repairing a Siemens Schuckertwerke AC Motor
Disassembly Te screws of the bearing covers were completely sheared off, probably from vibrational damage.
New bearings Replaced the old bearings with new SKF 6200-2RSH ones.
Odd screws The screws holding the bearing cover were of an odd dimension, either imperial or something like M3.5.
I decided to rethread the inner plate to M4, so I can use standard screws. To do this I used a 3.5mm reamer to clean up the hole and re-threaded it to M4.