User talk:Daveb

Dave Brown playing for a while:)

Project Ideas

Project	Status	Notes
Reconfigurable sailing proa	mostly inactive, built small bits	Rob Denny at http://www.harryproa.com has some interesting things to say about Proas and how they could be the basis for a cheap, high performance, spacious sailing cruising boat. Perhaps the ideal cruising boat :). I want to explore the sailing characteristics in a model.
LED lights and lenses for my bike	active	http://pilom.com/BicycleElectronics/DynamoCircuits.htm explains the matching of LEDs to bike generators. I plan to have several strings of LEDs with different beam angles and aiming points - and the appropriate string of LEDs turned on for the current bike speed. Success criteria: generate some light at low speed generate more light at high speed get it too work don't break the bank
Visible surge arrestor	project	I want to know when power surges happen, and if possible stop them cheaply and quickly.
Low viscosity blood	thoughts	I have some more reading to do; but am intrigued by http://customers.hbci.com/~wenonah/new/mcdaniel.htm and http://en.wikipedia.org/wiki/Integrated_Pulmonary_Index
Make solar cell?	idea	Link http://www.freewebs.com/acselectronics/TiO2solar.html
Safe by design nuclear	meme	2 hour promo
Money acceptor	idea	link the following up to the central credit server RFID tool control - a RFID reader for your ID, a camera, a computer, some reference images, an input tray, a money vault, message window (i think that is £2.00 - will you accept £2.00 credit for it?) or (i think that is 10.50 USD, will you accept £3.76 credit for it?) or (i think that is a bottle cap, will you accept a £0.02 charge to dispose of it) and servos to shake the tray for better images, flip the tray over to accept money or dispose of trash. Given we had software that recognized stuff in sink, is it a big leap to recognize images on a tray?
mirrored coils	wild ass	wind two coils on the same core, one left hand the other right hand and link them together. I think they should act as a filter of some sort, because the emf generated by the first travels faster than the electrons and reinforces the current in the other coil, smoothing out the edges of each pulse. The filter frequency being related to the speed of light and electrons in copper and the coil winding length. Maybe there would be less energy lost in the filter?

Project Status

See Speed Adjustable Bike Light

Parts Shopping

GDT 420v surge arrestor for 240v (if my calculations are right)

wire to board screw connectors 300V 20A

Electrolytic Cap 50v, 2200uF, 8k hours lifetime, 3A ripple current, 23mOhm inductance, ?ESR.