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I was looking at adding some wiring to one of my bikes, which is a commercial e-bike that uses 'Julet' waterproof connectors. It seems these aren't easily available, but there are 'Higo' connectors - but they're rather expensive. Other waterproof connectors from the likes of Farnell aren't...

My Chinese controller (made by yiyun.cn) arrived courtesy of ebay. It turns out the battery and motor connectors are almost but not quite the same as the XPC26. After bodging them to connect, shorting the 'lock' pins, and applying a twist throttle to the 'derailleur' pins, it happily powered...

Interesting. I have ordered a cheap eBay controller (seems like all the fancy ones are brushless, so cheap it is) and will have a go. How many flashes do you get on the LEDs when it dies? I get a repeating sequence flash/flash/pause when I turn it on with the torque sensor disconnected. I...

I've been playing with my olde Yamaha XPC26 (24v NiMH battery, bottom bracket DC brushed motor, torque sensor). It has a fault where it'll run fine but if you stop pedalling for a few seconds it indicates a problem, giving two flashes on the LEDs. That's when it's freshly charged and the...

If anyone is interested I have four of these battery packs for sale... bought them for an e-bike conversion project that never happened. I'd just like to recoup my investment so £34 a piece? Collect from Cambridge or I can try and find a courier to ship them at cost (suggestions welcome)

An update... I soldered up a new battery pack, after having a practice on some cheap Poundland zinc-carbons. It needs a really hot iron - I had a 450degC bit for my Weller TCP temp-controlled iron, and use lots of flux. I tinned up a baked bean tin by covering it all over with solder...

I suppose I could take tin cans and hammer them flat... time to get eating those beans! (I do enjoy wandering around supermarkets looking for items for the packaging not the contents... currently the cheapest glass bottle in Sainsbury's is 22p... anyone want a dozen litres of Economy Brown...

I looked into making a spot welder like this one... I have a 68000uF 35V capacitor so I might try it sometime, if I can work out a cheap way to make a 35V power supply (which would get me about 30% of the joules of the above design). I've also had a play with soldering up some dead alkalines...

Hmm, at 4x the price (£8.50 for 2 against £13.65+VAT=£16.38 for 1). And they don't give any technical data. Think I'll pass :( I'm also plotting... I'm wondering whether I can make a little board to fit inside the battery to do charge monitoring. This thread has some ideas. There's a small...

This bike is unusual as the battery has separate charge and discharge connectors. The discharging connector is at the bottom of the battery and has (in order) thick red (+ve current), thick black (-ve current) and thin black (?). The charger connector is a different type at the handle end of...

Thanks for the advice. I finally got around to cracking the lid on the battery (4 big self-tapping screws plus a single long plastic clip in the middle on each side of the battery: a few old credit cards got me in eventually). And the news is... it contains 20 NiMH D cells! Which is a right...

I have a 2000-vintage Yamaha XPC26 that is probably up for a recell soon. It's been barely used, stored in the garage and until I got it probably done less than 50 miles from new. It's the lead acid version - the battery (24V, think it's 96Wh) is surprisingly good after all that time - I get...