Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Just giving a quick update -- I got a new round of PTC Resettable Fuses today, including a "Fast Blow" @ 100mA (Ceramic) from Bourne.
This Resettable Fuse is actually working VERY WELL... seems to stop it just like the tool does whereas the Bel that was working the best prior didn't below for...
Diver, thanks for the recommendation on the specs -- I stepped down my specs down a bit and just ordered a PicoScope! Like I said, I had been thinking about getting one for some time, so this was the nudge I needed.
I ended up keeping 4 channels since I have a number of other projects in mind...
Diver, thanks again for your recommendations.
I've been thinking about getting an oscilloscope, so I think timing is good to pick on up!
After researching this today, I thought the following could be good...
Diver300, any chance something like this could work?
https://www.ia.omron.com/products/family/3491/lineup.html
Looks like it's an adjustable Current Sensing relay with either Transistor OR SPDT contact output...
https://www.ia.omron.com/products/family/3491/specification.html
Maybe I could...
Thanks Diver, I came across this Hall-Effect device already a number of times... and using a transistor to a higher power relay makes sense since I would be working off of signal, not Line Voltage.
If I got something like the above designed, would it make sense that when the micro controller...
Just wanting to come back for an update -- I'm still working on optimizing this solution.
I am receiving another round of PTC fusses to do more testing early this week.
I did receive a 6.2vdc DIN rail power supply to test the motors at a lower voltage, and like everybody said, they do work and...
Just another quick update -- I ordered a couple different DIN mountable Pheonix Contact Power supplies:
https://www.mouser.com/ProductDetail/651-2904595
This unit looks to be adjustable from 5vdc to 6.2vdc (~$100 USD)
https://www.mouser.com/ProductDetail/651-2866721
This unit is pretty fancy...
Looks like XP Power (the company that makes the 9vdc DIN mount supply I currently have) makes a 5vdc 15W 3Amp, and a 5vdc 30W 6Amp...
They don't appear to make a 6v.
Would either of those 5vdc supplies make sense or is that too little voltage?? More Wattage or less...
I really like this line of thinking... maybe I can tune everything so the motors have very little torque and stop easily without stressing the plastic actuator stop... I would want everything to be as gentle as possible!
I ordered some more Fast Blow resettable PPC that seem like good specs for...
Hi Nigel -- yeah, agree, think I am rather optimistic here... what has confused me is the manufacturer's tool (which the circuit is listed above), includes a Resettable Fuse that seems to trip very quickly and essentially stops the motor right away in both directions and doesn't seem to get too...
I added the following Resettable Fuse in-serial (I think):
https://www.mouser.com/ProductDetail/530-0ZRR0010FF1E
This was supposed to be 100mA "hold" and 200mA "trip"...
I simple added it in-line my multimeter leads... is there a polarity on the Resettable Fuse?
Unfortunately, it did not...
Just thinking out loud here a bit as I wait for my Resettable Fuses...
I've been trying to find some specifications on "cycles", "maximum resets", "lifetime", etc...
I haven't been able to find a whole lot on that topic, but did dug up comments from manufacturers like:
These Polymer PTC...
OK, in this product line, it looks like there are only 6vdc Max and 16vdc max... for the "lowest" Hold and Trip current 16vdc one, it's notable higher than the 6vdc one, so hopefully the 6vdc holds up (again, that's what the factory "tool" ships with... (I will do some testing, etc..)
One more...
Agree my multimeter display is a bit confusing.... I wasn't questioning it before, but maybe it's 600mA - 700mA instead of 60mA - 70mA...
The specs on the N Littlefuse .75A (guessing that's 750mA, so maybe it does make sense?).
However, the specs on my DC motor show Rated Current at <=...
Hi Diver300,
I did some more testing of the current with a multimeter... actually created a short video to demonstrate what I'm seeing. Unfortunately, I don't have a variable current source...
Looks like the motor actually uses ~.65mA when rotating... Would be great if you could review the...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
