Some SMPS power supplies don't like transient loads like steppers on them.
You can get the output voltage collapsing to a low value momentarily. ie a nominal 12V dropping to some 6V or so for several hundred uSecs.
J45sonError?
and I made an error and frazzled the Routout.
(Got enough 7805's there?):lol: yes I don't remember buying ten oh well more spares for my box of bits
Eric
According to the company that sell the toner kit they claim that only GBC laminators work because they have heated rollers
Apparently other laminators heat between the rollers and don't work
Eric
According to the company that sell the toner kit they claim that only GBC laminators work because they have heated rollers
Apparently other laminators heat between the rollers and don't work
There's an article here (http://ultrakeet.com.au/index.php?id=article&name=superfuser) about improving the GBC laminator for this sort of work.
[While you're there, check out their article on building a spot welder :thumbup:]
...without a keypad you can still see the startup splash screen (check the contrast if not! ;-)
If I had a £1 for every time someone asked me if I made PCB's for the divider... :ddb:Heh, I guess you still would be way behind J.K.Rowlings. But even if one in 5 of the interested would actually also buy a board, it just might be somewhat of a business. You surely wouldn“t be giving them away for free...
0.06v too low...
Just remember that means it'll be 0.06% out. So if you're going clockwise you'll need to add 0.06% to the values and anticlockwise take it off...
:thumbup:
Why not draw the enclosure and / or keypad in a CAD program for precision instead of an art program ??
John S.
madjack,I don't know much about programing, and you can bet I will follow your lead all the way, with regard to getting this rotary table cnc operating, I just picked up the 556 because they are so handy and cheap, and I didn't have an extra one laying around. It might well become the oscillator/driver for the flasher I can't buy for love nor money for my new/old 81 Mercedes 240D, so I can get it registered with turn signals and everything. I'm still stuck on not having found the parts to make the board you so gallantly made available to all to use. I've got a nice print out of the board on paper, and I'm going to try the repeat printing you describe on your other forum, but I don't know if my printer will be accurate enough, and I will either have to revert to the way I etched boards in the early eighties, or use the iron method of transfer of ink, to the circuit board. Does ink jet ink transfer with heat? If not, I will have to print on a clear sheet, and use photo-resist and put the board and print out in the sun for a few minutes. By the way, I did not know the "PIC" was an eight pin chip, I'm way behind you, and slow to catch up, but really appreciate the learning experience. More than I can truly express. :jaw: :bow: mad jack
You want to get into programming PIC's (or similar), with only a few lines of code a 8 pin PIC can do everything a 555 or 556 can do with less components and cheaper!
And being programmable, it can do an awful lot more!
By the way, I did not know the "PIC" was an eight pin chip, I'm way behind you, and slow to catch up, but really appreciate the learning experience.Hi Jack,
I'm getting bored now waiting for my programer to turn up from china/hong kong ( I except all stuff like this will be held up because of the recent bomb plot )
I want to get on with this project at the weekend :(
Where could I order a programer and what I need to program a 40 pin pic tonight ? for the weekend
| Part Number | Value | Farnell | Qty | Notes | ||||||||
| C1, C2 | 33pF | 1141761 | 2 | |||||||||
| C3, C4 | 100nF | 1469310 | 4 | Decoupling -- spread liberally. | ||||||||
| C5 | 470uF 25v elec | 9451200 | 1 | |||||||||
| VR1 | 10k Preset | 1689844 | 1 | Contrast control | ||||||||
| R1 - R4 | 10k | * | 4 | Keypad pull downs | ||||||||
| IC1 | 18F452 | 9762230 | 1 | Pre-programmed with firmware. | ||||||||
| IC2 | 7805 | 1755508 | 1 | And small heatsink. | ||||||||
| 40 pin IC Socket | 4285669 | 1 | For PIC 18F452 | |||||||||
| Xtal | 10Mhz | 1611856 | 1 | |||||||||
| Keypad | 4 x 4 | 1171224 | 1 | (or 16 buttons) | ||||||||
| LCD 4line x 20 | * | |||||||||||
| PCB | Or stripboard construction. | |||||||||||
| 8 Pin SIL socket | 1218869 | 1 | Only if using Farnell keypad. | |||||||||
| Case | ||||||||||||
| Power supply | To suit stepper/stepper controller. | |||||||||||
| Beeper | ||||||||||||
| LS1 | Passive sounder | 1192513 | 1 | |||||||||
| Q3 | BC337 | 1574379 | 1 | NPN transistor (500mA IC) | ||||||||
| R5 | 4k7 | * | * | |||||||||
| D2 | BYV27 | 1469371 | 1 | Any fast switch diode | ||||||||
| Sense/Ack | ||||||||||||
| D1 | BYV27 | 1469371 | 1 | Any fast switch diode | ||||||||
| Q1, Q2 | BC337 | 1574379 | 2 | NPN transistor (500mA IC) | ||||||||
| R8, R9 | 4k7 | * | * | |||||||||
| R6,7,10,11 | 10k | * | * |
Bogs,
If you are willing to use an old laptop or desktop computer I can supply everything except the table.
It will be a box with mains plug on, USB plug for the computer and a lead out going to a stepper motor.
You start the computer, start the program and this is what you see.
(http://www.stevenson-engineers.co.uk/files/rotabcontrol.jpg)
Does basically all a Division master does but not hand held.
John S.
PS Send photo of hairy arse.