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Three different PIR switches designed for use with 12V lighting systems. Two of them use a relay for switching the load, the other one uses MOSFETs.
Data sheets:
http://www.sc-tech.cn/en/CS9803.pdf
http://www.ladyada.net/media/sensors/BISS0001.pdf
http://www.din-tek.jp/Upload/Product%20Doc/Datasheet/DTU09N03.pdf
Three different PIR switches designed for use with 12V lighting systems. Two of them use a relay for switching the load, the other one uses MOSFETs.
Data sheets:
http://www.sc-tech.cn/en/CS9803.pdf
http://www.ladyada.net/media/sensors/BISS0001.pdf
http://www.din-tek.jp/Upload/Product%20Doc/Datasheet/DTU09N03.pdf
Hi. I just purchased a PIR switch with 4 connectors (2 in, 2 out), but it fails to work whenever I connect the two grounds together.
Any clues how I might fix this?
Thanks very much.
That whole "components not fitted" stuff reminds me of Earl "Madman" Muntz, who used to tinker with the tv sets that they were manufacturing by removing one part after another to see how many could go and have the thing still work…
Absolutely loving what you're doing with these vids!
Would a security camera be better for peice of mind
Great analysis.Thank you Julian.
Please help me find this LED light.
Hey Julian. You should make a playlist of all your vintage projects like the Z80 stuff you've posted.
I've been goofing around with a few old MPU's, namely the Z80, 68K, and 6502. YouTube has been suggesting several of your uploads over the last few days. They are pretty cool, you should be really proud of those. I wish I could prototype and build stuff like you've demonstrated. You've posted some of the best examples of real Z80 application hardware on here.
These MPUs have become so cheap, IMO, they are a practical way of learning the gritty details of registers and hardware level computing without going cross eyed trying to figure out what's happening on a more modern uC datasheet.
If you ever feel inclined to make more content on vintage hardware for those of us that weren't around when this stuff was current, I am finding it more challenging to figure out the details of peripheral ICs. I am still trying to ground my understanding of all the different opinions and what will and will not work. I think it would be really interesting if someone with the experience and know how compared something like the ATmega328 to the Z80 and simply noted the go-to part numbers for peripheral ICs you would use with the Z80 to achieve similar results to the 328's integrated peripherals. I imagine this might seem silly to the EE vanguard, but as a younger hobbyist that's only been goofing around for a few years, I have a different baseline grasp of these 8-bit systems. I think a lot of the info about this stuff is only focused on the nostalgia community when in reality a basic Z80 system can be put together for less than $10 now. At that price point there is a wider potential audience interested in a fundamental understanding of this learning opportunity. At least that's how I see it. I have several playlists of examples from many other CC's. There is a lot of interest in this stuff but much of the information about the peripheral IC options seems to be omitted as if the info is defacto implied and unnecessary. This even encompasses how to interface with memory and how to use modern flash to replace the old eproms.
Anyways… I really appreciate the vintage info you've shared. I have your basic 'blink a LED Z80 style' video setup on a breadboard right now.
It was actually one of your videos about Arduino clones that got me to pull the trigger and buy a few things to try and learn electronics back in 2014. It just seemed accessible because of what you were showing.
Thanks again.
-Jake
Get off my lawn!
For the "knock-a-door-run" mischeifs, you may want to try hooking it up to a water pump and garden hose, I'm sure you could put something together 🙂
If they are playing pranks on you you should be able to do it to them. Setup a remote control water pump outside the door and a mini camera to watch for them. You could also setup an air horn instead of the hose.
You need to hook up a speaker to it and blast out some Barry Manilow out the front in addition to the light. I hear the kids of today run from choice music.
Any link to the light/led fitting please?
You’ll know this Julian, but for those who don’t get some of that spider spray from
Amazon or whenever. I use it for my cctv and other outdoor equipment.
It stops all he spiderwebs and falsely setting off sensors. Spiders hate it! When I sprayed it about a bazillion spiders all descended on ‘ropes’ like an SAS team from a helicopter !!
I want to see some 240v versions analysed so I can place then in different locations to outdoor floodlights and know before I buy if they will be durable.