Master power switch for E-bike ideas - Page 3

**stj** · 12-11-2021, 03:48 PM

just put a fucking 2pole switch on it and stop over-complicating things!

**Dannyx** · 12-11-2021, 04:27 PM

Naah - too basic

**eccerr0r** · 12-11-2021, 06:27 PM

I don't think you really can "take off" with the resistor regardless. Worst case it'll run really slowly and the resistor will burn out... Put an appropriately sized 100 ohm resistor there, you can't even get one twentieth of a horsepower out of the motor - that's not going anywhere fast.

Could stick a 120V incandescent bulb there instead of a resistor...still not going anywhere fast, and really cheap.

**Dannyx** · 12-12-2021, 03:58 AM

Quote:

Originally Posted by eccerr0r

Could stick a 120V incandescent bulb there instead of a resistor...still not going anywhere fast, and really cheap.

This is actually a good idea and I thought of it myself a while ago, though the resistance would be all over the place. It's bulkier too, so space is a bit of an issue. Not sure what the "idle" power consumption would be (with the FET off), because the bulb would be in series with the controller box all the time, so long as the battery's connected, but the resistance is probably high enough the power consumption would also be negligible, even with a stone-cold filament.

**stj** · 12-12-2021, 06:00 AM

bulk? use a linear halogen tube - they are like a short pencil.

**sam_sam_sam** · 12-12-2021, 06:13 AM

Yeah but I would use a 250 watt version not the 500 watt version

**Dannyx** · 12-12-2021, 06:38 AM

Quote:

Originally Posted by stj

bulk? use a linear halogen tube - they are like a short pencil.

Might work. Would still need a holder for it....or I could go ghetto and solder to it directly

I already grabbed a 50w resistor from Ali for like 2 bucks which has lugs on the end already. Like I said: no rush, since it's going to be another 4-5 months until I can go for a ride on this thing

Quote:

Originally Posted by sam_sam_sam

Yeah but I would use a 250 watt version not the 500 watt version

Because 250w = higher resistance ?

**sam_sam_sam** · 12-12-2021, 07:30 AM

Yes and less current than 500 watt would be
If you have an old light fixture that uses this type of bulb then you just need to figure out how to use the holders together so it will work maybe make it on a 3 D printer

**eccerr0r** · 12-12-2021, 12:10 PM

PLA and incandescent bulbs of any type do NOT mix.

And no, don't use those high wattage halogens, you want low wattage bulbs for their resistance, like a 4W night light bulb... or less. Enough to charge the capacitors, not enough to run the bike in any capacity. Unless the intent is to give a thief a false sense of hope?

12-11-2021, 03:48 PM	#41
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 28,331	Re: Master power switch for E-bike ideas just put a fucking 2pole switch on it and stop over-complicating things!

12-11-2021, 04:27 PM	#42
Dannyx CertifiedAxhole Join Date: Aug 2016 City & State: Constanta My Country: Romania Line Voltage: 230VAC 50Hz I'm a: Hardcore Geek Posts: 3,303	Re: Master power switch for E-bike ideas Naah - too basic __________________ *Watt*evah...

12-11-2021, 06:27 PM	#43
eccerr0r Solder Sloth Join Date: Nov 2012 City & State: CO My Country: USA Line Voltage: 120VAC 60Hz I'm a: Hobbyist Tech Posts: 7,914	Re: Master power switch for E-bike ideas I don't think you really can "take off" with the resistor regardless. Worst case it'll run really slowly and the resistor will burn out... Put an appropriately sized 100 ohm resistor there, you can't even get one twentieth of a horsepower out of the motor - that's not going anywhere fast. Could stick a 120V incandescent bulb there instead of a resistor...still not going anywhere fast, and really cheap.

12-12-2021, 06:00 AM	#45
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 28,331	Re: Master power switch for E-bike ideas bulk? use a linear halogen tube - they are like a short pencil.

12-12-2021, 06:13 AM	#46
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Some times Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 4,117	Re: Master power switch for E-bike ideas Yeah but I would use a 250 watt version not the 500 watt version __________________ 9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50F then at 90F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had CAPs POOF All of the mosfet that are taken out by bad caps

12-12-2021, 07:30 AM	#48
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Some times Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 4,117	Re: Master power switch for E-bike ideas Yes and less current than 500 watt would be If you have an old light fixture that uses this type of bulb then you just need to figure out how to use the holders together so it will work maybe make it on a 3 D printer Last edited by sam_sam_sam; 12-12-2021 at 07:34 AM..

12-12-2021, 12:10 PM	#49
eccerr0r Solder Sloth Join Date: Nov 2012 City & State: CO My Country: USA Line Voltage: 120VAC 60Hz I'm a: Hobbyist Tech Posts: 7,914	Re: Master power switch for E-bike ideas PLA and incandescent bulbs of any type do NOT mix. And no, don't use those high wattage halogens, you want low wattage bulbs for their resistance, like a 4W night light bulb... or less. Enough to charge the capacitors, not enough to run the bike in any capacity. Unless the intent is to give a thief a false sense of hope?

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