Search found 1047 matches

by megacycle
Apr 27 2019 4:02pm
Forum: Polls & Surveys
Topic: If you could do something entrepreneurial in the EV industry,what would you do?
Replies: 8
Views: 505

Re: If you could do something entrepreneurial in the EV industry,what would you do?

I'd advance and promote a.c. onboard fast charging to out compete d.c. fast charging.
by megacycle
Apr 27 2019 4:43am
Forum: Large EV General Discussion
Topic: Simple 330V charging circuit
Replies: 1
Views: 174

Simple 330V charging circuit

I was thinking about this and if and how it could work to fast charge a large Lifepo4 EV pack that has good BMS protection and where there is an ample supply available of say 150A+, 415V, 3phase. Example 30kW pack at approx 3C in about 20 mins. Presently only come across this type of charging for sm...
by megacycle
Sep 13 2015 6:06am
Forum: General Discussion
Topic: Fukushima melting down?
Replies: 181
Views: 20401

Re: Fukushima melting down?

nutspecial wrote:"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." - Bertrand Russell
Good footnote on the Dunning Kruger effect.
by megacycle
Aug 23 2015 2:39am
Forum: E-Bike General Discussion
Topic: Speedict Ebike - Anybody seen/tried this?
Replies: 1331
Views: 147774

Re: Speedict Ebike - Anybody seen/tried this?

Racer_X wrote: Anybody know where i can buy the JST PH 2.0mm female 15 pin connector plug w/wire?
You'd need 16 pins, might have to use a DSUB or 2x 8S JST.
by megacycle
Aug 21 2015 11:30pm
Forum: E-Bike General Discussion
Topic: Speedict Ebike - Anybody seen/tried this?
Replies: 1331
Views: 147774

Re: Speedict Ebike - Anybody seen/tried this?

rosich wrote: the last diagram was misleading, this is the another one i capture from user guide, it support multi-cell via wiring scheme.
Thanks rosich, this is perfect for a 15S bike, I have with a speedict already fitted :D.
by megacycle
Aug 20 2015 6:31pm
Forum: E-Bike General Discussion
Topic: Speedict Ebike - Anybody seen/tried this?
Replies: 1331
Views: 147774

Re: Speedict Ebike - Anybody seen/tried this?

rosich wrote: include shipment and support from 10s up to 15s
I thought the upper limit was 13S?
by megacycle
Aug 16 2015 10:25pm
Forum: General Discussion
Topic: Fukushima melting down?
Replies: 181
Views: 20401

Re: Fukushima melting down?

Another interesting thing about all this is amount of protester's I have noticed who show up around nuclear power plants in Japan they have like 2000 people show up to protest against nuclear is completely pathetic and crappy compared to 10,000+ people that might show up in the protest in Melbourne...
by megacycle
Aug 12 2015 3:07am
Forum: General Discussion
Topic: Fukushima melting down?
Replies: 181
Views: 20401

Re: Fukushima melting down?

"Criminals should not get tax concessions – if you break the law, then donations to your organisation should not be tax deductible" - Senator Barnaby Joyce Australia Barnaby Joyce, Abbott & the rest of the LNP ilk are criminals themselves, Are you talking about a completely unrelated subject becaus...
by megacycle
Aug 03 2015 7:46pm
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

On my wee 14.5AHr 36v Dolphin pack I used to get a spark if the charger was off at the mains before I plugged it in but if the charger is already on, it plugs in with no spark. On, Charger output caps charged, so small voltage differential between charger and battery. Off, output caps discharged, l...
by megacycle
Jul 30 2015 9:14pm
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

How do you rate your "Solar AC/DC circuit breakers" to your controller? The highest I could find from local source is 63A 150VDC, and right now I got 65A controller, but later will mod the traces for higher amperage. They are rated on the curve of the breaker, most are B, B/C or C, Like I've got. T...
by megacycle
Jul 30 2015 7:14pm
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

Most automotive fuses are not rated for the voltage in use. That's because the automotive fuses are rated for automotive use up to around 30-40V max. When the fuse blows, say due to a controller short circuit fault or battery lead short, a higher voltage than rated will sustain the current through ...
by megacycle
Jul 28 2015 12:50am
Forum: Battery Technology
Topic: Tesla Powerwall $350 / kwh Retail
Replies: 151
Views: 16097

Re: Tesla Powerwall $350 / kwh Retail

So how did labour end up with a small dept after the GFC ??... .. By going into it with a large surplus !....curtesy of the previous government ! It's not the job of government to run a surplus, it's job is to look after its people, a perfect balance of payments wouldn't be overly positive or overl...
by megacycle
Jul 27 2015 2:38am
Forum: Battery Technology
Topic: Tesla Powerwall $350 / kwh Retail
Replies: 151
Views: 16097

Re: Tesla Powerwall $350 / kwh Retail

Scare campaign ?? The only thing that scared me was the total irresponsible financial management of the previous bunch. I don't have political alliances, I judge governments on actual performance. So how did our performance rate to the rest of the OECD, coming through the GFC? Here you go- banner-7...
by megacycle
Jul 27 2015 12:28am
Forum: Battery Technology
Topic: Tesla Powerwall $350 / kwh Retail
Replies: 151
Views: 16097

Re: Tesla Powerwall $350 / kwh Retail

........ due to a retrograde government, that got in by a fear campaign, ..... ....possibly, but certainly less scary than retaining their predecessors who displayed complete financial ineptitude and inability to organise even a piss up in a brewery,..let alone any sustainable government policy. .....
by megacycle
Jul 25 2015 5:56pm
Forum: Battery Technology
Topic: Tesla Powerwall $350 / kwh Retail
Replies: 151
Views: 16097

Re: Tesla Powerwall $350 / kwh Retail

Hi, Peak grid :mrgreen: Good to see youve peaked :wink: Here in Australia our actual annual grid consumption has dropped, since it peaked in 2008, now down by about 10% and we weren't affected by the GFC, it's been due to a combination of increases in electricity prices, increase in use of energy m...
by megacycle
Jul 23 2015 8:34pm
Forum: Battery Technology
Topic: Tesla Powerwall $350 / kwh Retail
Replies: 151
Views: 16097

Re: Tesla Powerwall $350 / kwh Retail

Is it possible the Grid may disappear from certain areas where Tesla and SolarCity get a foothold? Me thinks that a real possibility. I definetly think it will force more competitive pricing onto networks & gentailers, when network pricing is based on Maximum Demand and Time of Use Tariffs. Regardi...
by megacycle
Jul 11 2015 6:02pm
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

The ones I bought were worthless for my application with 24s lipo once I found out the resistor was only 6 ohm. They shouldn't be used with voltages over 24V imo, though some have used them with up to 12s lipo. It all depends on the controller. They might work ok with a low voltage controller with ...
by megacycle
Jul 10 2015 9:40pm
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

A 100 Ohm, 1W, carbon resistor in the end of a 5.5mm bullet. 20150711_113917_resized.jpg Drilled 3.5mm hole in end of a 5.5mm bullet, down to about 2/3rd resistor length, held bullet together for drilling by cutting down a 5.5mm socket into a ring, to go around the bullet. The carbon resistor doesn'...
by megacycle
Jul 10 2015 6:13pm
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

Suppose it can't hurt to repeat the same information over and over, if no one is reading posts.
by megacycle
Jul 10 2015 4:04am
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

I was thinking how i could make a precharge resistor, i cut down a large pencil graphite section and pushed fitted it into the end of my 5.5mm bullet, it was sticking out about 4mm and measured about 3.7 Ohms from the bullet to the graphite tip, need to make it more, about 10mm, should give close to...
by megacycle
Jul 09 2015 9:15pm
Forum: Battery Technology
Topic: Big spark when connecting battery to bike
Replies: 77
Views: 12941

Re: Big spark when connecting battery to bike

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/capchg.html That link should be of use to people trying to figure out the ideal resistors to use for their setup. Thanks for the link. The amount of energy dissipated in the precharge resistor to approx 100% capacitor charged, should be 1/2CVsqd. ...
by megacycle
Jul 02 2015 9:19pm
Forum: General Discussion
Topic: The death of Peak Oil = The death of green energy?
Replies: 132
Views: 18339

Re: The death of Peak Oil = The death of green energy?

Reckon the money/power megalomainics who really run things and treat the common man with contemp and condescension, will look to the easiest option of protecting their interest in their own future by depopulation, a combination of creating situations of scarcity, manafactured disease, wars, and what...
by megacycle
Jul 01 2015 5:53pm
Forum: General Discussion
Topic: The death of Peak Oil = The death of green energy?
Replies: 132
Views: 18339

Re: The death of Peak Oil = The death of green energy?

From the graph, can see that the why the USA secured its oil imports. What is the latest EROI on extracting oil from wells and tar sand, real terms, not the phony documents produced by vested interests, that don't include all the factors of wasted energy in extraction, now we also must include the c...
by megacycle
Jun 27 2015 8:18pm
Forum: General Discussion
Topic: Laser Gun Project
Replies: 66
Views: 7035

Re: Laser Gun Project

So cool fechter.