Finlay, I have another project to show you. :) I played around with JPG compression and wanted to find out how far I could go. I was able to cram pictures into about 2 kb. With crappy quality granted, but at least recognizable. That is small enough to fit inside a QR code. Scan the codes to view the pictures. (And get some more information)
I would be thrilled if some of you would reply with picture QR-codes of your own. The website showing the pix should give you enough hints to pull it off.
I would be thrilled if some of you would reply with picture QR-codes of your own. The website showing the pix should give you enough hints to pull it off.
Even though my camera has a USB port, it is not able to power itself from it. For this you need an adapter that of course is not included. I made my own yesterday from parts laying around. The small PCB is a step down converter that drops the Voltage down to the 4.3V the cam is expecting. The wires are just crammed between the threads of the bolts.
Of course I uploaded the print files:
https://www.printables.com/model/616757-canon-nb-6lh-batterydummy-for-s90-s95-s120
All this is related to upcoming more regular (semi weekly) posts in the future.
Of course I uploaded the print files:
https://www.printables.com/model/616757-canon-nb-6lh-batterydummy-for-s90-s95-s120
All this is related to upcoming more regular (semi weekly) posts in the future.
Years ago, I adapted a camera charger I found somewhere, to fit another brand. My mother is using it ever since.
Last new years I decided against getting fireworks. It's just too harmful to the environment. Instead I build this "reusable" rocket out of a d1 mini microcontroller and a WS2812B LED-strip. It is "lit" by pushing a button.
The kids really like starting the rocket.
The kids really like starting the rocket.
Yesterday, just in time for a brunch with some friends, the switch of my coffee machine broke. No coffee was not an option, so I had to repair it ASAP.
I have lots of switches lying around but no perfect match. So I cut the old one up and used it as a mounting bracket for the new one. With some glue and a piece of plastic sheet as a frame, it even looks quite nice. :)
Not bad for a 30-minute hack!
I think this might work now for another 20 years.
I have lots of switches lying around but no perfect match. So I cut the old one up and used it as a mounting bracket for the new one. With some glue and a piece of plastic sheet as a frame, it even looks quite nice. :)
Not bad for a 30-minute hack!
I think this might work now for another 20 years.
I needed a new doorbell so I made one. It is thrwoen together from parts I had laying around. A small 12V power supply from an ugly LED lamp somebody threw out, an audioamp module with a used speaker and an "Atari Punk Console" for sound generation. This is a famous DIY synthesizer circuit that can be made from very few parts and has a quite dirty sound. I also added a local button to tune the ringtone.
Lets see how long my GF tolerantes it before I have to get a "proper" one.
Lets see how long my GF tolerantes it before I have to get a "proper" one.
I found a better ringtone for my DIY doorbell. It is just a flickering LED with a resistor in series. Due to the pulsing current draw of the LED the voltage drop on the resistor is pulsing, too. This signal can be amplified and sounds really wired.
I tried to build a NAS / homeserver from my old Thinkpad. With its 2 SATA, 1 ESATA and 1 Mini PCIE Port it seemed perfect. With a few modifications of course.
I put everything on a frame and suspended the drives with old bicycle tires. A Relais cuts off the 12V to the drives when the Laptop is off, by being powered by USB.
Sadly the T410 doesn't support MSATA. :( so my plan was spoiled.
I put everything on a frame and suspended the drives with old bicycle tires. A Relais cuts off the 12V to the drives when the Laptop is off, by being powered by USB.
Sadly the T410 doesn't support MSATA. :( so my plan was spoiled.
The relaismodule is active low. To switch when the USB port has juice it has to be converted to active high.
between the input and the relais is an optocoupler. Its LEDs anode has to be connected to the input instead to Vin and the cathode to ground instead of the input. a few cuts and jumpers are all that is deeded. :)
between the input and the relais is an optocoupler. Its LEDs anode has to be connected to the input instead to Vin and the cathode to ground instead of the input. a few cuts and jumpers are all that is deeded. :)