Built another one, this one fits into a slightly larger DIN rail enclosure and consists of 3x old power relays, a D1 board and a 12V SMPS power supply. Below the D1 board there is a 7805 regulator to get the 5V needed for the D1. I put Tasmota on the ESP8266 again, as with the last.
ESP8266 Controlled 12V/AC 50VA Supply
I recently built this 50VA 12V/AC power supply with two switchable channels for lighting. It uses a ring transformer, I added a temperature fuse and short-circuit current limiting resistors (0R82). Below the D1 board is a 7805 voltage regulator, since the D1 board only accepts 5V nominally. The ESP8266 D1 board runs Tasmota.
I used some left over spray RAL 3003 paint from the Karl Klein DNG 6-22,5 paint repair for the front and back panels on this one. I think it looks cool.
ESP8266 Tasmota SSR Switching Relay
Built this small Tasmota based switching unit, it contains two SSR switches (TRIACs) and a relay and is designed to fit into a 4TE DIN rail case.
It runs off mains voltage through a small integrated AC/DC SMPS power supply, this is then further stepped down for the D1 microcontroller using a 7805. The TRIACs (BT137) are switched using MOC3063 optocouplers with zero-level detector. The D1 runs Tasmota with a custom/generic configuration.
Saarbrücken May 2024
All pictures taken with my Sony SLT-a77 with a Sony DT 18-55mm F3.5-5.6 SAM.
Racapping a Mettler AE163 laboratory balance
The older Mettler AE series laboratory balances don’t have a standard power button, the main circuit is always running. As such the capacitors in the these balances which were manufactured in the early 80s are slowly in the territory of needing replacement. As such I decided to recap mine.
As a precaution since the circuit board contains lots of FET and a proprietary IC I took full ESD measures and did this with proper ESD tools, on an ESD mat with a ESD wristband.
Wood Boxening
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.