I promise not to lend it to you then ...One of my pet hates, much prefer using the ones without a removable socket even though you need at least a 6,7 and an 8 mm
I promise not to lend it to you then ...One of my pet hates, much prefer using the ones without a removable socket even though you need at least a 6,7 and an 8 mm
One of my pet hates, much prefer using the ones without a removable socket even though you need at least a 6,7 and an 8 mm
Mine is still on the desk looking back at me....A nice little laser distance sensor for a raspberry pi. I'm going to use it to detect if the pellet boiler's hopper is empty, and gauge pellet consumption.
Here it is being tested using a breakout board on a pi. It worked straight out of the box, just need to configure the i2c bus on the pi and add a python library and off you go.
View attachment 326721
Here's output from the example python file, I just moved my hand in front of the sensor a little to change the distance.
pi@boilerpi01:~/distance $ ./distance.py
Display the distance read from the sensor.
Uses the "Short Range" timing budget by default.
Press Ctrl+C to exit.
VL53L1X Start Ranging Address 0x29
VL53L0X_GetDeviceInfo:
Device Name : VL53L1 cut1.1
Device Type : VL53L1
Device ID :
ProductRevisionMajor : 1
ProductRevisionMinor : 13
Distance: 372mm
Distance: 77mm
Distance: 277mm
Distance: 611mm
Distance: 688mm
Distance: 174mm
^C
pi@boilerpi01:~/distance $
I'll make a few changes so it puts the output into a database so I can alert on nearly empty and graph usage. I can calibrate the sensor by letting the hopper empty then throw in a 15kg bag of pellets at a time.
I'm printing off a tiny case for the sensor then I'll wire it into the hopper tomorrow.
I was going to make one with some massive linear potentiometers I found but as with most things, never got the tuit. What's the output from a glass scale? Is it two square waves like a rotary quadrature encoder?Mine is still on the desk looking back at me....
Must get to it sometime. Wonder if you could make a Pi dro???
Should be, yes, possibly plus a "reference mark" that is a single pulse at one specific location. If it's a decent one, each square wave / pulse will be sent differentially (i.e. two lines which are the same voltage-ish at one level and then pulled apart - one high, one low - for the other level - RS422 or similar). You can get ones with analogue outputs (sine and cosine wave with a period of the order of tens of microns), but they're much rarer. Then of course there are absolute ones, but they're really expensive and I'm sure you'd know if you getting one of those.I was going to make one with some massive linear potentiometers I found but as with most things, never got the tuit. What's the output from a glass scale? Is it two square waves like a rotary quadrature encoder?
I used to use Lenze 9300 servo drives/ motors with sine wave encoders - resolvers was their official name. The motors used to go haywire when they went faulty which could be “interesting” with 3 tonnes of paper spinning at high speed!Should be, yes, possibly plus a "reference mark" that is a single pulse at one specific location. If it's a decent one, each square wave / pulse will be sent differentially (i.e. two lines which are the same voltage-ish at one level and then pulled apart - one high, one low - for the other level - RS422 or similar). You can get ones with analogue outputs (sine and cosine wave with a period of the order of tens of microns), but they're much rarer. Then of course there are absolute ones, but they're really expensive and I'm sure you'd know if you getting one of those.
Sounds exciting! A resolve is a type of position sensor that uses windings (much like a motor in some ways) to generate the sine and cosine. Optical encoders can also generate sine and cosine (and in fact, most decent ones do). High performance optical encoders generate a sine and cosine from the dark and light lines (or gaps) on the scale and then interpolate the sine and cosine to give a resolution much finer than the period of the scale and hence the period of the sine and cosine.I used to use Lenze 9300 servo drives/ motors with sine wave encoders - resolvers was their official name. The motors used to go haywire when they went faulty which could be “interesting” with 3 tonnes of paper spinning at high speed!
10lts of Fine Paraffin.
Half price as the Eco lables fell off.
View attachment 326846
Plus.
View attachment 326847
A bit of "Meths" and some blue paint for a on going project.
The Local winnos.Where do you get the meths in 5l jugs?
I've not been able to get it locally in anything bigger than 2l bottles (at a tenner a go )
Yes , as well as a set of hose clip tools!Do you not have a welder?
Oh, did I ask for it?TYA,I have got the 3/8 drive AF version of that Gedore socket set, mostly complete, bought in 1965 for my first job on leaving school. Pretty bulletproof, I’ve never managed to break it!
EDIT …… no you can’t have it ……
Have you been chatting my wife up again? You bad boy!
Have you been chatting my wife up again? You bad boy!