New Heavy-duty Buzzer

Heavy-duty buzzer with charging adapter and USB-receiver
Heavy-duty buzzer with charging adapter and USB-receiver

I built a new buzzer for photo booths. The new case is even more stable than its predecessor. As a bonus, it allows charging two AA cells independently without opening the case. The receiver is implemented using a Yongnuo RF-603. It may be expanded with a USB-dongle that emulates a left mouse click or hitting a key on a keyboard.

 

Power Olympus Cameras from a 5 V Source

I performed tests to power Olympus cameras (OM-D E-M1) from a 5 V source. The voltage of 7.5 to 7.6 V required by the camera was delivered by a DC-DC step-up converter.

In general, powering a camer this way is possible. I just couldn’t find a power source yet that allows to drive the camera without restrictions. Even a wall wart delivering 2 A maximum current wasn’t enough to get single frame pictures at a decent pace. Too short image intervals caused troubles saving the taken pictures. Common USB chargers won’t drive the camera even in idle mode.

Maybe a power source delivering 2.5 or 3 A may do the trick. I couldn’t verify it yet.

Sudan 2017 gallery is online

I have selected a couple of pictures of my recent trip to the Sudan. They may be seen here in my gallery.

MY Aurora

I am still searching for the wreck of the Aurora, lying at Wingate Reef. As far as I know, she sank on November 23rd 2004 during a storm. She is reported to lie at about 20 meters depth in the vicinity of the Umbria. The image shows the Aurora on her last trip in October 2002.

I am glad about any hint leading me to the exact position of the wreck. If you know about the wreck, please tell me through my contact form.

Back from Sudan

I was diving the area south of Port Sudan towards the Eritrean border. I used the trip to test dive computers and to do some research on the position of a wreck I’m looking for. Pictures of the trip will be shown in the gallery soon.

Back from South America!

I have been on an expedition in South America. We wanted to dive a crater lake at 5900m altitude to test outdoor and diving equipment. Sadly, the weather was too bad to achieve our goal. Nevertheless, I had a great time in Bolivia and Chile. During the next few days, I will process pictures from the trip and upload them to a gallery on this site.

BLH-1 Battery Dummy available!

BLH-1, BLN-1 and BLS-5 Battery-Dummy

After a series of tests I have built a BLH-1 battery dummy for Olympus cameras (currently the OM-D E-M1 Mark II). Since the battery is larger than other models, the lid of the battery compartment is also bigger. This allows to cut a slot for the cable to pass through while the lid is closed. You shouldn’t do this to the original lid. That’s why I currently try to get spare battery compartment lids for the camera.

You may find more details about battery dummies on my Battery Dummy Page.