Search results

Date Relevance Most replies

  1. erth64net

    What's your Wh/mile or Wh/km

    The last thread I saw discussing eBike power-over-distance efficiency was back in 2009, and I'm really curious where numbers have gone over the past 5 years. I've consistently drawn 12-15Wh/mile while zipping the Recchetta around. What's your efficiency?
  2. erth64net

    Retiring my first LiFePo4 pack

    Just thought I'd share this picture. I purchased this 24V/20Ah LiFePo4 pack from the eBay seller "pingping227" back in September 2008. They now sell through their website: http://www.pingbattery.com. Here in October 2014, this six year old pack is finally ready to retire.
  3. erth64net

    Minimalist BMS

    Searching through the forums, I can see that Lee Hart is well known...although not much has been discussed about his minimalist battery regulator design that integrates just a visual indicator, resistors and a few zener diodes. For my initial test case, I'm considering use of 2.4V 500mW zener...
  4. erth64net

    Considering Maxwell BoostCaps

    I'm considering the use of Maxwell Boostcap Ultracapacitors to capture braking/regen energy, and to assist with initial acceleration. The points not clear are: - What's the maximum possible charging current when using Maxwell's balance boards? - Is the derived energy density worth the cost and...
  5. erth64net

    Programmable Linear Hall Effect as PWM generator?

    For signaling an ESC's throttle, has anyone considered using a self-compensating (temperature) programmable hall effect sensor as the PWM source? I'm thinking along the lines of a Micronas HAL 2850, which supports anywhere from 30hz to 2Khz PWM periods...although I could use some help...
  6. erth64net

    Why left-handed drives? Disk + Sprocket?

    I assume the primary reason for going with left-hand drives (aka: chain sprocket mounted on hub's disk tabs) is because of the torque involved with a higher power setup's acceleration. So, if one wanted to keep their disk brake, then a dished-out sprocket bolted onto the disk side sounds like...
  7. erth64net

    CorrosionX for waterproofing?

    The rain has finally settled in around here, so waterproofing is high on the priority list. It looks like CorrosionX could be a great solution.
  8. erth64net

    Dewalt + cellshield for discharge & factory BMS + charger

    My goal is as compact a package as possible, with the charger separate from the rest of the battery/power system, and the batteries simply shrink-wrapped. Originally, the idea was to try using the unswitched 15A off the Dewalt 28V pack...blew the fuse tonight :mrgreen: So...since this is a...
  9. erth64net

    Waterproofing

    I'm still trying to find the perfect water-proofing solution for my Castle Creations H85 + the addition of some caps soon. This is my current setup: To explain the angle-bar: it was purchased just slightly too thick to fit between the heatsink fins, after filing them down for a VERY tight...
  10. erth64net

    Dual-diameter 6mm & 12mm motor shaft?

    I've got a Scorpion 4025-16, which is designed for a 6mm shaft (slight press-fit when installed). The dilemma is; the freewheel/clutch-bearing that I'm eyeing needs to slide onto a 12mm shaft, so...I'm seeking a 125mm long shaft, where the first 90mm is 6mm in diameter and the final 35mm of...
  11. erth64net

    Castle Creations Special Projects

    I just stumbled across this site, and a quick search through the forums yields just a half-dozen buried references. So, here's my little attempt at bringing Castle Creation's "other business" into our view: http://www.castlespecialprojects.com/
  12. erth64net

    Adding motor to Rohloff disk tabs?

    The underlying idea is to add a brushless outrunner in a direct-drive setup, onto a bike with a Rohloff gearbox...without driving the extra power/torque through the gears. Maybe even eliminating the belt and chain-drives too? Could one attach a 5mm-wide/mod1/110-tooth gear to the Rohloff's disk...
Back
Top