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Slow high torque electric motors for stirrer?
So, looking at that I can see 3 optocouplers, and associated input resistors and protection. So yo ... |
3-2-2018 at 21:11
by: Twospoons |
Slow high torque electric motors for stirrer?
Hey, sorry about the trolling comment - now I know where you are coming from I can understand a bit ... |
3-2-2018 at 17:17
by: Twospoons |
Slow high torque electric motors for stirrer?
There also appears to be a red wire from pin 2 to ground. And blue + green connecting pin 6 to groun ... |
3-2-2018 at 01:27
by: Twospoons |
Slow high torque electric motors for stirrer?
Looks like you have pin 3 connected to ground (yellow wire) and to the end of the cap on pin 5 (gre ... |
1-2-2018 at 20:55
by: Twospoons |
Slow high torque electric motors for stirrer?
what sort of test gear do you have? Do you have a meter that reads frequency? If not you could check ... |
1-2-2018 at 14:26
by: Twospoons |
Slow high torque electric motors for stirrer?
Things like [url=https://www.radioshack.com/collections/resistors/products/500-piece-1-4-watt-carbon ... |
1-2-2018 at 00:57
by: Twospoons |
Slow high torque electric motors for stirrer?
That looks perfect. Now you just need to work out appropriate component values. For the series res ... |
31-1-2018 at 18:32
by: Twospoons |
Slow high torque electric motors for stirrer?
Once again the 555 diagram is not quite right. You are showing a direct connection from pin 4 to pin ... |
31-1-2018 at 14:24
by: Twospoons |
Slow high torque electric motors for stirrer?
Every time you redraw the 555 timer it seems to be different - and not quite right.
Refer to this: ... |
30-1-2018 at 12:19
by: Twospoons |
Growing a CuSO4 crystal using a "hydrothermal" process
At the top, and in fact most of the way down, its 34C. Right at the bottom, on top of the bulk CuSO4 ... |
22-1-2018 at 17:39
by: Twospoons |
new way of PCB via plating
[rquote=504421&tid=78387&author=RogueRose] I'm confused as to why the holed need plated, do ... |
21-1-2018 at 14:15
by: Twospoons |
Growing a CuSO4 crystal using a "hydrothermal" process
Second attempt. This took about a week and a half to grow to this size. It has unfortunately sproute ... |
20-1-2018 at 17:28
by: Twospoons |
Slow high torque electric motors for stirrer?
Something like this? I'm guessing, based on the pin labels, that the driver has opt-couplers on the ... |
15-1-2018 at 16:15
by: Twospoons |
[Metalurgy] Homemade steel body armor
@joseph6355 Don't listen to the nay-sayers. Have a go.
Its right there are the top of the page ... |
3-1-2018 at 13:52
by: Twospoons |
Anyone else in NZ?
Yeah, the cops are pretty reasonable - I had one living next door for years, and my glassware was vi ... |
21-12-2017 at 22:36
by: Twospoons |
center tap for unipolar stepper motor
If you wanted to go just a little more sophisticated than a 555, then one of the small Arduino MCU b ... |
21-12-2017 at 14:05
by: Twospoons |
center tap for unipolar stepper motor
He's using a current controlled stepper driver chip - 24V wont hurt - just means you can ramp the cu ... |
18-12-2017 at 15:36
by: Twospoons |
Growing a CuSO4 crystal using a "hydrothermal" process
I got my heater from china - on Aliexpress. I've bought quite a lot of stuff that way, and only enco ... |
17-12-2017 at 14:01
by: Twospoons |
Growing a CuSO4 crystal using a "hydrothermal" process
Yesterday I turned off the heater, as prep for terminating the experiment. This was a mistake - the ... |
16-12-2017 at 19:35
by: Twospoons |
Large Li-ion battery packs, compact jump starters and truth in advertising?
I've seen a few ads for those things, and I'm deeply suspicious of the claims. Given the size of the ... |
15-12-2017 at 14:52
by: Twospoons |
Growing a CuSO4 crystal using a "hydrothermal" process
The crystal is now ~40mm long. I'd post a pic, but unfortunately my phone turned into a brick yester ... |
11-12-2017 at 20:08
by: Twospoons |
What were your first experiments when you got in to this hobby?
I started with one of those kids chemistry sets, back in the early '70s when they had interesting st ... |
5-12-2017 at 14:34
by: Twospoons |
Making an induction heater for fastener removal?
If you are still keen on making an induction heater then http://4hv.org is the place to go for advic ... |
4-12-2017 at 19:36
by: Twospoons |
Making an induction heater for fastener removal?
Screw extractors tend to be made of hardened steel , and are therefore brittle. If an impact wrench ... |
3-12-2017 at 12:57
by: Twospoons |
Growing a CuSO4 crystal using a "hydrothermal" process
I thought I'd have a crack at growing a copper sulfate crystal using a setup based on hydrothermal c ... |
2-12-2017 at 15:06
by: Twospoons |
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