Movement detection switch wanted for bike (electrical)
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slowmotion
Quite dreadful
- Location
- lost somewhere
[QUOTE 3928279, member: 9609"]I am looking for an electrical switch that can open or close itself depending if the bike is moving. ideally this would be similar to whatever works a bike computer and starts or stops the timer depending if the wheel is rotating. any ideas ?[/QUOTE]
Wheel rotation is a pretty good indicator of movement. You could use a spoke-mounted magnet and a reed switch/Hall effect pick-up on the fork. You need to process that pulse signal into a moving/stationary status. That needs some kind of signal conditioning circuit and a power supply. The electronics are pretty simple. It's a classic watchdog/charge pump circuit.
Wheel rotation is a pretty good indicator of movement. You could use a spoke-mounted magnet and a reed switch/Hall effect pick-up on the fork. You need to process that pulse signal into a moving/stationary status. That needs some kind of signal conditioning circuit and a power supply. The electronics are pretty simple. It's a classic watchdog/charge pump circuit.
classic33
Leg End Member
Last edited:
classic33
Leg End Member
[QUOTE 3928306, member: 9609"]yes, i'm definitely wanting it to work from the wheel in the same way as a cycle computer works. I could fit a magnet and a reed switch - its the rest that mystifies me. there must be some gizmo on the market that would keep a ciruit closed when a pulse is sensed, then switch it off when no pulse has been noted for 1 minute.
Is there any lights that work this way ?[/QUOTE]
Reellights!!
Is there any lights that work this way ?[/QUOTE]
Reellights!!
slowmotion
Quite dreadful
- Location
- lost somewhere
[QUOTE 3928306, member: 9609"]yes, i'm definitely wanting it to work from the wheel in the same way as a cycle computer works. I could fit a magnet and a reed switch - its the rest that mystifies me. there must be some gizmo on the market that would keep a ciruit closed when a pulse is sensed, then switch it off when no pulse has been noted for 1 minute.
Is there any lights that work this way ?[/QUOTE]
I don't know about lights that have this feature. "Watchdogs" are very widely used in CNC machine tools. The controlling software sends out a pulse regularly to show that the software is running. If the software hangs up and doesn't send out a pulse within a chosen period, the watchdog closes the machine down in a controlled fashion. They are designed to prevent robotic machine tools from running wildly out of control.
The circuit can be very simple...less than a dozen components on a piece of Veroboard.
Is there any lights that work this way ?[/QUOTE]
I don't know about lights that have this feature. "Watchdogs" are very widely used in CNC machine tools. The controlling software sends out a pulse regularly to show that the software is running. If the software hangs up and doesn't send out a pulse within a chosen period, the watchdog closes the machine down in a controlled fashion. They are designed to prevent robotic machine tools from running wildly out of control.
The circuit can be very simple...less than a dozen components on a piece of Veroboard.
slowmotion
Quite dreadful
- Location
- lost somewhere
[QUOTE 3928317, member: 9609"]would any components soldered onto a piece of veroboard work, ?[/QUOTE]
If they were the correct ones....
If they were the correct ones....
snorri
Legendary Member
- Location
- East coast, up a bit.
Is it worth fiddling around with home made kit when Amazon has such a device for £9.84?
http://www.amazon.co.uk/Motion-Detector-Bike-Alarm-Waterproof/dp/B000MXERJK
http://www.amazon.co.uk/Motion-Detector-Bike-Alarm-Waterproof/dp/B000MXERJK
slowmotion
Quite dreadful
- Location
- lost somewhere
I like fiddling around! It's more fun than just buying stuff on Amazon. I do far too much of that too....
snorri
Legendary Member
- Location
- East coast, up a bit.
Apologies if my link was to a similar product, but your link didn't work for me when I first posted
.
classic33
Leg End Member
Bugger. Another none working link.Apologies if my link was to a similar product, but your link didn't work for me when I first posted
No harm done, just thought it'd been missed.
I'll check & correct it
[QUOTE 3928454, member: 9609"]I am really after an off the shelf product rather than something I have to make myself - a simple switch that turns to ON when the wheel is rotating then turns to OFF when it stops rotating. every cycle computer has one in it, I just need one that I can utilise.[/QUOTE]
What exactly are you trying to do? As you say, a cycle computer does this, so why not use a cycle computer mount?
What exactly are you trying to do? As you say, a cycle computer does this, so why not use a cycle computer mount?
vernon
Harder than Ronnie Pickering
- Location
- Meanwood, Leeds
[QUOTE 3928503, member: 9609"]Automatically turn an electrical circuit on when the bike is moving then turn it off after the bike has been stationary for a short period of time -
the on off mechanism is inside the cycle computer not its mount.[/QUOTE]
It might be helpful if you said what you want the electrical circuit to do.
the on off mechanism is inside the cycle computer not its mount.[/QUOTE]
It might be helpful if you said what you want the electrical circuit to do.
