Thread: Wow - huge price difference

Hi,
The Ebay seller trades as skt flyer.
Rob,
Have the manual for the KBIC controller, let me know if you need a copy. I have no idea of your level of electrical knowledge or experience so please get get qualified assistance if you need it as high D.C. voltages are lethal.
Regards,
Martin

Martin,
that link you posted doesn't work for me and I can't seem to search for a specific seller on ebay. Can you post a link to the actual item you bought?
Chris

skt flyer items - Get great deals on Wires and Connector, LED items on eBay Stores!

Thanks RC

Martin,
have you managed to source a reasonably priced optical sensor?
Chris

G'Day Chris,
If you want a photo interrupter to read a moving vane, Jaycar have their ZD 1901 @ $3.50 or if you want reflective (much nicer in my opinion) uxcell in HK have their EE-SPY412 @ $9.25, I have found uxcell pretty quick with their delivery, small items in an envelope usually arrive in about 7 days.
Regards,
Martin

Thanks Martin, the EE-SPY specs look good. Have you nutted out a circuit yet?

Hi Chris,
I am waiting for the tacho module to turn up before I make a decision as I have choice of used sensors in the junk collection, the EE sensors are an Omron product and you can download application notes from their website, they claim that you must use their connector, but I have found you can safely solder to the pins if you heatsink them and work quickly.
Regards,
Martin

wouldn't it work just as well with a hall effect sensor? One on a gear somewhere would do the trick as the tacho has a division input, ie how many spikes per rev.

I thought about that Ewan, but I don't know whether a hall-effect sensor is sensitive enough to resolve individual teeth on a lathe gear. I've never used one. Does anyone know?

EDIT: would this method improve resolution at very low RPMs?

My wife's car has toothed wheels, maybe 1/2" c to c teeth, presumably with HE sensors for speed, revs and crank position (the one on the front of the engine that counts revs is missing a tooth). This is 23 y/o tech we are talking about. Depends on the DP of the gear i guess, i don't know if i have a HE sensor handy, i might order some and hook them up to the oscilloscope and have a look at the waveform they create at a decent speed.

Edit, here is the 3503 data sheet. the only real problem in the presence of a magnet on the sensor which may attract swarf. http://www.jaycar.com.au/products_uploaded/ZD1902.pdf
2nd edit, i'll order some 3144's, they have a build in voltage reg so can run off 4-24v

Great, I'm keen to hear the results.

G'Day Fellas,
You buggers must have been peeping through my workshop door, went through the junk today and dug out a HZK-101 Hall sensor, checked it out and it gives a nice fat 12 volt switching pulse. I knocked up a single hole sector plate tonight and will post a photo when the paint dries.
Regards,
Martin

Hi Martin,

I'm pretty OK with electronics (basic stuff) so I'm aware that 180 V DC can be lethal and that capacitors take a while to wind back

Just in case anyone is interested I have 5 brand new KBIC-240 DC controllers comming in from the US in the next few weeks.

I will be using one and selling the rest at $65 each plus postage or pickup.

So if anyone is interested ping me an email.

I also have a second hand KBIC-240DS (thats 240 AC to 90 DC) that I will probably move on for the same price.

There's no warranty or returns on this stuff.

I'm in Adelaide.

Cheers

Rob

I already have a Baldor variable speed converter/controller. What I'd like is a suitable motor. Where do you source yours?

Greg