I have electronically actuated (as opposed to cable actuated) gear shifting on my bike. It's becoming way more common these days, though...but still, it's a pretty expensive piece of kit for quite marginal gains.
Front and rear derailleurs are servo controlled. These connect to a central unit that also has the shifters connected to it. This central unit can communicate with a bike computer (via ant+) to show gearing.
In addition, you can set it up so that when you shift the front derailleur, it automatically moves the rear derailler. You might want to do this in order to keep roughly the same gear ratio when changing chainrings. Or, there is a mode where you just shift up and down, and the system manages the shift for you, shifting either (or both) derailleurs, simulating a 1x drivetrain.
All of the popular group sets have a version of this: shimano, sram, and campagnolo.
Nothing wrong with that. There’s something to be said for going with simplicity. Way easier to fix if something goes wrong. If I was doing some really hardcore touring through remote areas, I would definitely favor friction shifters for this reason.
CRT monitors: the Intergraph Interview 28HD96, informally known as the "Carmacktron" (see picture)
A true 16:9 aspect ratio PC CRT monitor with a maximum output of 2042x1152 @ 80Hz. Not the highest horizontal frequency out there but an absolute monster in 1995.
For me pain is multidimensional, there’s different kinds of “worst.” The short drop onto a hospital bed after surgery was by far the strongest, sharpest, brightest pain I ever felt, but it only lasted a millisecond. Kidney stones can be sharp and radiating, but the pain tends to be localized with ebbs and flows. Pancreatitis was not as “sharp” as a kidney stone, but it was bigger, harder to tolerate, more attention consuming, and came with aweful nausea.
Richard Dawkins first coined the word ‘meme’ to describe a self-replicating idea, akin to a gene. He gave religion as a prime example with the form something along the lines of “statements X,Y,Z are true. It is your duty to make others believe this, or they will go to hell”.
It’s been 40 years - I can’t remember the original formulation 🙂
Flipped over the front of my bike as a kid and knocked my two front teeth out. But it wasn't that part that hurt. It was when the dentist shoved them back into the hole. I about levitated out of the chair out of sheer pain.
I had a bulging disc and one day I was laying on the couch and sneezed. I felt this pop in my back and the pain was indescribable. I started helplessly crying and yelling for help. After waiting in pain for 20 minutes, my gf brought me to the ER where I cried in the lobby for 8 hours straight waiting to be seen.
Turns out I herniated my disc. I went to PT for 6 months and have slight nerve damage to this day. Funny enough a new latex mattress saved me. I live pain free every day when before that was unthinkable.
This might be an unpopular opinion but I wouldn't trust my security on a free piece of software running on an raspberry pi. You would be best using a regular off the shelf alarm system, I'm sure you can still get ones that aren't Internet enabled
As a contract security manager… the pi system is better than many off-the-shelf systems. One thing to keep in mind is that you absolutely want to control the data you generate. Every cloud service (ring, etc) will provide free and basically immediate access to your data. This includes if they think YOU are guilty of something. Or if they just tell them you are because their sister/daughter/wife/whatever smiles at you in the park.
If you keep data, they can still subpoena it, and you’d still be obligated to hand it over, but it comes with a lot more paperwork and oversight.
Whatever you go with, software should be open source. Especially if it’s internet connected. This allows third party validation of what is actually happening. Here is a guide on r-pi to create door alarms. You can probably configure something using a pi pico w fire quite a bit less, however, and send it back over a network for reporting. You’d still have to power it, though.
The issue with door alarms is… so you get the alarm, what do you do then? Unless you have some way to review prior video (5-10 minutes, if you get an alarm.) and those cameras show the device in alarm, you have no real way of knowing what’s going on. You’re certainly not going to run home every time.
Most door alarms are false alarms, triggered by people forgetting their code or kids just being kids, etc. calling the cops (or paying a service to call the cops,) is a bad idea.
There’s plenty of guides on pi cams, and those are more useful- you’ll want complete coverage- which means broadly all sides of your house, with close shots on the doors, back gates or shed doors. maybe windows.
One or two cameras are less useful. A hoodie, cap or obstruction can evade that. And in any case cameras are passive systems. They tell you what happened, they don’t stop anything from happening.
The single most effective device is a deadbolt lock on all exterior doors, and bar locks for sliding doors. If your dealing with porch pirates, a chest with padlocks they can then lock (or purpose built chest,) will deter most (but if they really want it, they’ll get it.)
In my experience, any open source camera software is unreliable and clunky. To be honest though, a lot of cloud solutions seem quite bad too. What I'm talking about though is an old fashioned alarm system that has no Internet capability and just has a pin pad, a backup battery and a siren.
Yes, I actually thought about that as well. However, it does seem to be a bit more "intrusive" regarding laying cables, don't you think? Also, I would imagine this to be a lot more expensive, but I might be wrong...
definately no Ring, etc. products that save videos feeds in the cloud
use RPis running an open source software as a "backend" for the cameras (in the best case this records continuously, and deleting everything older than 5-10 minutes, or records on movement)
aim for full coverage with cameras
if everything runs locally only, VPN is required to get live feed if something triggers
Do you also happend to have any suggestions regarding software and hardware? I'm not sure if relevant, but I'm in Germany, so cameras like Wyze V2 (which can run RTSP software, iirc), might not be available...
Cameras are basically just cameras. Most the purpose-bought stuff are going to be rebadges anyhow. I'd highly recommend staying away from USB cameras. they're unlikely to encode the video in anything other than MJPEG which is horrible in terms of compression. PiCams can be configured to encode into H.264, which is the most common form of encoding format, and MUCH better than MJPEG, H.265 is newer, but the hardware to encode with is more expensive- meaning the cameras are more expensive. it's also better than h.264.
You don't need much for frame rates- while it'll appear to stutter, 5 FPS is data efficient. 15 is smooth enough that I wouldn't really go higher. Resolution depends on your needs and where the camera is being installed- generally, higher resolution more storage is needed, but also, the better distance the camera can see at. 1080p is probably going to be good enough, and maybe going up to 3 or 5mp if you're mounting up on a flag pole (or if you want to read license plates,)
IPCams are going to be purpose built and less fiddly, and many have a great feature- Power over Ethernet- that reduces the number of cables you have to run. housing is largely a matter of personal choice, but be aware that if it has exposed cables, it shouldn't be mounted low enough that people can reach it with a clipper. I recommend more discrete housings- lots of obvious cameras might not send the message you want, and in any case, if people know there's cameras, they can be easily defeated with a ball cap and a hoodie.
The DVR is actually more important than the cameras- Seagate has a handy calculator for how much storage you need per camera per all the other stuffs. You frequently can just use a desktop with added storage drives- you don't need anything fancy, stick it on a shelf and let it do it's thing- but, it should be noted that if you have a drive go down you loose your recordings, so it might be worth considering raid 1 or 5. that said, even though the cost of terabytes worth of storage went way down than what it used to be... you still need a lot. Start with how long your typically absent from your home while on vacation or business trips. add a couple days to it. you very quickly can get up into the tens of terrabytes of data, even with a lot of sacrifices.
I've not looked at software in years... but taking a quick perusal of opensource and (generally free) offerings- Kerberos stands out to me as being as polished as anything I've used- aside my company's in house platform. It's at least a midgrade set up... and could very easily be top-tier. Things to note- the agent provide your interface with the cameras. it's where you set up the cameras. Vault is where you handle storage- including configuring things like rolling old files for overwrite etc. Apparently Vault will happily send everything to whatever cloud storage service you want to use (including AWS s3, for example) which would allow disaster recovery (i.e. if you had a fire.)
I spy was another one that popped up...but it... reminds me of the low-tier stuff I've had to use (and hated)
I get migraines, so I’m weirdly used to high levels of pain. I had one migraine so bad I vomited, fell asleep for about 6 hours, then woke up and kept vomiting uncontrollably. Ended up in the ER because I was puking straight bile. But as far as pain goes, not the worst.
When I was pregnant, they had to induce me. They try to keep you off an epidural as long as possible, but I was having contractions every 5 minutes while 0% dilated. Hurt like a bitch, and they wouldn’t let me lay in any comfortable position because the heart rate monitor wouldn’t register. But that wasn’t the worst.
I had a kidney stone impact in the lower part of my ureter. They had gone in to remove it but couldn’t because it was impacted and infected. So they placed a stent. The doctor said I must have been in a lot of pain before surgery. Didn’t feel a THING. The next day I felt fine. Went to work (desk job). Came home and laid on the couch. Over the course of an hour I started shivering uncontrollably and spiked a massive fever. I developed sepsis. I was in the hospital for 5 days. Still wasn’t the worst.
No, the worst was my third kidney stone which was apparently caught on scar tissue in my ureter. I was in so much pain I couldn’t think. I couldn’t answer questions. I couldn’t do anything.
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