Search found 55 matches

by Firedog
Jan 25 2021 12:11pm
Forum: Items Wanted
Topic: Wanted: Crystalyte APM display
Replies: 2
Views: 398

Re: Wanted: Crystalyte APM display

I need a Crystalyte APM display. Anyone?
by Firedog
Nov 15 2020 2:36am
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

Hi, Is it possible to build a mount that could provide 84 Volts, a reasonable number of Ah, and still fir in a stealth b52 bomber? How about 96V? Of course, Each battery is 18V10.5ah. Connect as many in series as you dare and you are kinda stuck choosing a voltage which is a multiple of 18V. As far...
by Firedog
Nov 15 2020 2:17am
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

Mounting them is fine. How about charging 6 bricks? Even with dual charger you would need to attend 3 times to fully charge. Not that convenient. You have choices. 1. The chargers are fast (9 or 6 amps =~ 1 hour) and play music when a battery is finished charging. Some keep the chargers near and do...
by Firedog
Jul 31 2020 9:54am
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

I'd love to know more about the battery builder you have. Very jealous you can go around the marketing and proprietary junk that comes with the big box tools. OK, Here's my tool battery source. Alex, Sales Manager OCT BATTERY & PLC SYSTEM Co., Ltd alex@oct-power.com He builds tool batteries rep...
by Firedog
Jul 28 2020 1:46pm
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

Here's my latest build using those expensive Makita battery mounts and six cheap 18v10.5ah batteries (54v21ah = 1134wh). It's a pretty compact package. The build is for an elite road racer who needs a lead bike (mule) to train behind. Apparently, elite riders can't get competitive just solo riding. ...
by Firedog
Jul 11 2020 1:03pm
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

Wineboyrider, It looks like you considered all the problems and have found decent solutions. Go for it! I didn't see a 6ah version until you mention it and that's a big difference. If you can fit 3 in parallel that will be a nice ride. The battery I opened was a clone marked 6ah but only had 20, 2ah...
by Firedog
Jul 10 2020 8:48pm
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

I like the greenworks 40v battery packs. Please be sure to post how you mount the those to the frame. They are 6.4" x 3.2" x 3.4" so sliding into the triangle from the side won't work since crank clearance is only 5". If you mount them above the crank 6.4" still to wide for...
by Firedog
Jul 07 2020 9:57pm
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

Morbid, You are so right, it is a prototype and looks pretty crude. I'm so involved with function and the tight the tolerance needed to make batteries go on/off smoothly with no play and mount solidly to the frame, I've lost perspective. Unless I could see and test one, I wouldn't buy it either. I w...
by Firedog
Jul 07 2020 3:07pm
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Re: Tool battery (Makita) mounts for ebikes

Angrybob thanks for responding. A generic unit with solid mounts which could be customized for different brands might be something to explore. I happened to be looking hard at Milwaukee units, also DeWalt. I limited my design to battery brands with cases available to fit 18v9ah or larger, a simple r...
by Firedog
Jul 07 2020 8:28am
Forum: Items for Sale - New
Topic: Tool battery (Makita) mounts for ebikes
Replies: 25
Views: 2086

Tool battery (Makita) mounts for ebikes

I've used 15 cell Makita style batteries on all my ebike conversions since 2016. I have them built in China by a company I trust completely using LG MJ1, Samsung Q30, or Sony VT6C cells. Construction, welds, cases are flawless. Mostly, I specify LG MJ1 (3.5ah/cell) so the 5s3p batteries are 18V10.5a...
by Firedog
May 28 2020 12:42am
Forum: E-Bike Technical
Topic: Reducing controller's current
Replies: 4
Views: 198

Reducing controller's current

I built a tandem using a Crystalyte 5303 front hub and 4840 controller running 54V. It has a 3 power level switch, a Clite cruise control and a thumb throttle. Even in low power, it's more than I want and the bike wants to go faster than 20 to 28mph range we like. In high power, it delivers the 40a ...
by Firedog
May 28 2020 12:06am
Forum: Battery Technology
Topic: Fast Charging - What is the secret?
Replies: 36
Views: 2480

Re: Fast Charging - What is the secret?

Tool batteries charge at successfully at very high rates. Makita 18V chargers charge at 9 amp maximum. Their secret is good engineering and design. The the batteries surface area/weight ratio is many time that of a ebike battery. The design is rugged from the sturdy weld grids and the close fitting,...
by Firedog
May 16 2020 1:00pm
Forum: E-Bike General Discussion
Topic: Diagnosing Controller w/ Ebike Tester
Replies: 13
Views: 462

Re: Diagnosing Controller w/ Ebike Tester

30v battery voltage? That's below the LVC on many 36v controller.
by Firedog
Apr 19 2020 2:40pm
Forum: E-Bike Technical
Topic: Can't make simple PAS work
Replies: 5
Views: 301

Re: Can't make simple PAS work

Yes, both directions..... but not for long enough!! It starts after 2 or 3 cranks in reverse. Thank you, so much.

I'll have figure how to remount the PAS to give the controller the direction it wants. Or is there a better way?
by Firedog
Apr 19 2020 12:08pm
Forum: E-Bike Technical
Topic: Can't make simple PAS work
Replies: 5
Views: 301

Can't make simple PAS work

I've built dozens of kit ebikes. I've never been a fan of simple cadence PAS finding a throttle with cruise control and several levels of power better. I doing a build now that requires PAS, but I can't make it work. I tried 3 controllers that have both throttle and simple crank mounted, magnet acti...
by Firedog
Jan 07 2020 10:50am
Forum: E-Bike Technical
Topic: 2000W 48-72V DC brushless controller wiring help
Replies: 18
Views: 1196

Re: 2000W 48-72V DC brushless controller wiring help

The orange and gray wires are likely cruise control: Similar controller https://www.ebay.com/itm/48-72V-1500W-Electric-Bicycle-E-bike-Scooter-Brushless-DC-Motor-Speed-Controller/183306034669?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D4ca3ce6fb3b747388e32c7dd61d...
by Firedog
Jan 07 2020 2:11am
Forum: E-Bike Technical
Topic: Crystalyte 3640 and 4840 controllers
Replies: 4
Views: 372

Re: Crystalyte 3640 and 4840 controllers

Climbing a long grade immediately pushes the power to 40-45 amps even in the low switch position and min. cruise setting. Amberwolf, I'm totally wrong on that report. What actually happen was I went full throttle to get up some speed ahead of a steep hill, set the cruise control, and didn't get the...
by Firedog
Jan 06 2020 2:44pm
Forum: E-Bike Technical
Topic: Crystalyte 3640 and 4840 controllers
Replies: 4
Views: 372

Crystalyte 3640 and 4840 controllers

I bought several of these (NOS) from a local bike shop. The 3640 and 4840 boards (EB212-A-5 ) and components seem identical except for one of the two power resistor (10w?). I assume it controls the LVC. 300ohm for the 3640; 330ohms for the 4840. Question #1: Can I change that resistor to make a 3640...
by Firedog
Jan 06 2020 2:33pm
Forum: E-Bike Technical
Topic: Using REGEN on Crystalyte CT4840 v2 Controller
Replies: 5
Views: 1007

Re: Using REGEN on Crystalyte CT4840 v2 Controller

6 years for a response! I have several 4840 and 3640 controllers with the same boards as your pictures. They do support regen braking if the solder hole marked Bk is grounded. Applying the brakes will activate the brake sensor switch and cut the throttle and engage motor braking if the speed is suff...
by Firedog
May 31 2019 8:08am
Forum: E-Bike General Discussion
Topic: Why do Hall Effect Sensors break? (UPDATE, AGAIN w new 5404)
Replies: 27
Views: 6863

Re: Why do Hall Effect Sensors break? (UPDATE, AGAIN w new 5404)

I had all 3 Hall sensors fail in a 5303 after the motor worked fine on the bench. It turned out a red(+) wire was shorted to the axle. New Halls and fix the short was the solution. I had tested all 5 hall lead wisre combinations for shorts but didn't think to check for a short to the motor. I hope y...
by Firedog
May 29 2019 2:20pm
Forum: E-Bike Technical
Topic: Guide: fixing deadband of Wuxing hall throttle
Replies: 3
Views: 1998

Re: Guide: fixing deadband of Wuxing hall throttle

It is a bit difficult to get the snaps to release fully since they bite on the full perimeter. That's "difficult" how about "nearly impossible"! Get a short length of 3/4' pvc sprinkler pipe. It is the perfect OD and the perfect thickness to release the snap. I suppose a piece o...
by Firedog
May 21 2019 1:35pm
Forum: Battery Technology
Topic: Small 36V battery recommendations
Replies: 7
Views: 751

Re: Small 36V battery recommendations

Consider running 2 18v tool batteries in series. Available 2 to 10ah. My choice is Makita because of the simple mount design, compact size, very low price, long life and fast charging (charger's cool cells with fan during charge). Flexible too: bring 2 spares for long rides and you can build the wif...
by Firedog
May 20 2019 11:52am
Forum: E-Bike Technical
Topic: KT-LCD3 display - speed report wrong
Replies: 3
Views: 748

Re: KT-LCD3 display - speed report wrong

couldn't match my GPS until I added the external sensor Thank you! Instead of ordering and waiting for a external speed sensor, I pulled a PAS sensor and an old spoke magnet out of my parts bid. It works perfectly. I set up this tandem to use a Crystalyte 5303 or a much lighter 408. A 5 minute swap...
by Firedog
May 20 2019 9:55am
Forum: Battery Technology
Topic: Using cordless drill batterys
Replies: 11
Views: 2022

Re: Using cordless drill batterys

Where did you find connection boards for the batteries
PM me for DIY instructions or a quote for me to build one.