h4nd 7,290 Posted June 27, 2020 Report Share Posted June 27, 2020 Add a amplifier? https://learn.adafruit.com/adafruit-max31865-rtd-pt100-amplifier/arduino-code?view=all Quote Link to post Share on other sites
NickJ 4,157 Posted June 27, 2020 Report Share Posted June 27, 2020 25 minutes ago, h4nd said: Add a amplifier? https://learn.adafruit.com/adafruit-max31865-rtd-pt100-amplifier/arduino-code?view=all Yes, preferred option is analogue at this stage as they are all free pins, if I put a screen into play it will chew up the bulk of the digi ports. Unless i'm missing fancy tricks? Quote Link to post Share on other sites
h4nd 7,290 Posted June 28, 2020 Report Share Posted June 28, 2020 Oops, tho SDI can support multiple devices. Edit, analogue amp here: https://www.aliexpress.com/item/32965912818.htm $34 for 2x or here https://www.aliexpress.com/item/32875383430.html @NickJ 1 Quote Link to post Share on other sites
NickJ 4,157 Posted June 28, 2020 Report Share Posted June 28, 2020 Just now, h4nd said: Oops, tho SDI can support multiple devices. Edit, analogue amp here: https://www.aliexpress.com/item/32965912818.htm $34 for 2x or here https://www.aliexpress.com/item/32875383430.html @NickJ Perfect! I'll put that in my build list, trying to plan this entirely so I can plug it all together over a weekend, not in the mood for development on my own projects right now! 1 Quote Link to post Share on other sites
Willdat? 4,554 Posted July 31, 2020 Report Share Posted July 31, 2020 Year 12s project to make a clock that re-draws the time every minute - it's upside down, but 15:10 is what it's writing... 4 1 1 Quote Link to post Share on other sites
Willdat? 4,554 Posted August 4, 2020 Report Share Posted August 4, 2020 Next version... 3 Quote Link to post Share on other sites
h4nd 7,290 Posted August 5, 2020 Report Share Posted August 5, 2020 Ship it. It good enough for initial release to market. Quote Link to post Share on other sites
anglia4 1,946 Posted August 5, 2020 Report Share Posted August 5, 2020 "Beta testing" Nobody knows what it means but its provocative. Gets the people going! 1 1 Quote Link to post Share on other sites
Ned 4,410 Posted August 5, 2020 Report Share Posted August 5, 2020 i really want to make one now haha. Seems fun! Quote Link to post Share on other sites
flyingbrick 9,543 Posted August 5, 2020 Author Report Share Posted August 5, 2020 Needs to be on whiteboard with a duster to erase the writing afterward Quote Link to post Share on other sites
anglia4 1,946 Posted August 5, 2020 Report Share Posted August 5, 2020 18 minutes ago, flyingbrick said: Needs to be on whiteboard with a duster to erase the writing afterward Immediately, before you can read the time. 1 1 Quote Link to post Share on other sites
Willdat? 4,554 Posted August 5, 2020 Report Share Posted August 5, 2020 1 hour ago, flyingbrick said: Needs to be on whiteboard with a duster to erase the writing afterward That's the plan! There will be a seperate arm with a duster that will erase the time each minute. I'm kinda keen on the idea that it only erases the number that changes, but to be honest the code works OK (and is plenty sophisticated for a 16 yo!). 1 Quote Link to post Share on other sites
Ned 4,410 Posted August 5, 2020 Report Share Posted August 5, 2020 you can add a 4th servo to the device, and spin the marker around 180deg and have an eraser on the end, and trace the same path it wrote for the last number, and write the new one 4 Quote Link to post Share on other sites
h4nd 7,290 Posted January 31 Report Share Posted January 31 Mr @Roman, do you happen to know if brake lights / indicator info come up CANbus via OBD2? TiA Quote Link to post Share on other sites
Roman 15,277 Posted February 9 Report Share Posted February 9 On 31/01/2021 at 14:12, h4nd said: Mr @Roman, do you happen to know if brake lights / indicator info come up CANbus via OBD2? TiA Sorry just saw this. Id say unlikely to even be on canbus let alone sent to obd2. (Which is usually cut down to a standard set of things) Its possibly info on canbus though, but thats highly specific car to car. You can use a can bus sniffer to see if any of the bits or bytes change value when you hit the brake or indicator though. 1 Quote Link to post Share on other sites
flyingbrick 9,543 Posted February 9 Author Report Share Posted February 9 On 05/08/2020 at 10:26, Willdat? said: Next version... How did this end up working Quote Link to post Share on other sites
h4nd 7,290 Posted February 10 Report Share Posted February 10 1 hour ago, Roman said: Sorry just saw this. Id say unlikely to even be on canbus let alone sent to obd2. (Which is usually cut down to a standard set of things) Its possibly info on canbus though, but thats highly specific car to car. You can use a can bus sniffer to see if any of the bits or bytes change value when you hit the brake or indicator though. Thanks, you just cleared up a mis-conception I had. More here https://www.csselectronics.com/screen/page/simple-intro-obd2-explained/language/en#:~:text=Link between OBD2 and CAN,that it can run on. 1 Quote Link to post Share on other sites
Willdat? 4,554 Posted February 10 Report Share Posted February 10 4 hours ago, flyingbrick said: How did this end up working He's actually looking at refining it this year, I'm encouraging him to document it so that others could follow the recipe if they were interested. To be honest the technology curriculum is set up for prototyping rather than making a final polished product. He's also making the CNC plasma I mentioned in @ThePogs thread. 1 Quote Link to post Share on other sites
h4nd 7,290 Posted May 19 Report Share Posted May 19 From over in Spam: Quote sooo, I'm vaguely thinking of making a CARduino, some shitty little PCB to make it easy to control extra things in a car (so it's already set up to run off 12-15V, a relay or two, maybe a big transistor to PWM control a fan etc, option for an LCD of some kind, timing / switch / temperature sensor inputs). What things would people want to do? In some threads people have mentioned ignition control timing car dome lamp control intermittent for window wipers fan control What else you want? (I'll update over in the arduino thread later here ). @Nominal wanted a fuel pump control, and warned about electrical noise in cars. (Yep yep, aha!) I'm pondering... Would folks want a case like this https://www.jaycar.co.nz/economy-die-cast-aluminum-boxes-119-x-93-5-x-34mm/p/HB5067 or plastic (then will also need a heatsink for a transistor for fan/ignition) or no case? Screw terminals or Spade connector blades on the PCB? Waterproof entry to the box? More features = more expensive, of course. Quote Link to post Share on other sites
flyingbrick 9,543 Posted May 19 Author Report Share Posted May 19 Personally I only like the idea of having them potted in epoxy or something (iv used hot glue before) as its all then 100% waterproof and protected Quote Link to post Share on other sites
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