Im new

@Alex

Yeah i did know it came without a reciver.Its called a sky sports 4.Link-

http://www.technobots.co.uk/acatalog/Online_Catalogue_4_Channel_Technobots_40MHz_251.ht mlhttp://www.technobots.co.uk/acatalog...chnobots_40MHz _251.html

Thanks.

Dan.

Dan, firstly, welcome to the club!

There is a difference between nicads and nimh. It is to with performance.

Basically if you are going to be going heavy on the current draw then go for nicads, they are far better at delivering large amounts of current in a hurry. Nimh will probably be better for your application as you wont be using your drive heavily in a flipper.

Nimh weigh less for the same voltage and capacity as well however they have one flaw. They have a memory. All cells have some form of memory, this means that they remember what level they were discharged to. So if you only discharge cells half way and then charge them and repeat this over and over then your cells will slowly lose their capacity.

This is removed by fully cycling the cells, ie running them flat and then charging them fully.

Dont worry about half discharging cells during competitions etc as they will take a bit of abuse but whenever you can, you should always fully cycle your cells.

Just to clarrify a point:

NiMH suffer from very little memory effect. More so, NiCds need to be cycled to prevent the memory effect.

NiCds are the only cell you should cycle. Other cells can be damaged by frequent cycling. NiMHs can benefit from cycling once in a while.

hi i just brought some batteries of ebay on monday they arrived today quite cheap and work there 7.2v ni-mh 3300 mah take about a week but they are from america
comes to about £38

http://cgi.ebay.co.uk/4-RC-7-2V-3300mAh-NiMH-Battery-For-Tamiya-E-Maxx-7-2_W0QQitemZ300142602285QQihZ020QQcategoryZ44022QQt cZphotoQQcmdZViewItemhttp://cgi.ebay.co.uk/4-RC-7-2V-3300...Maxx-7-2_W0QQi temZ300142602285QQihZ020QQcategoryZ44022QQtcZphoto QQcmdZViewItem

http://www.modelpower.co.ukwww.modelpower.co.uk 7.2 niMhs 3.9 amps

2 for £30

I have 25a viper marine speedos with the drill motors off gimson robotics-

http://www.gimsonrobotics.com/shop_dc-electric-motors.htmlhttp://www.gimsonrobotics.com/shop_d...ic-motors.html

I want some ni-mhs for this but how much power will i need?

Will i need just one battery or two?

Thanks.

Dan.

Fantastic, good to see another person about my age doing robots. Im still stuck in design stage, money = tight ROFL.

yeah, i think money is the biggest problem when you building robots at our age. Although i managed to build 2FWs and now building my first HW on a very tight budget.

LOL!Your right,money is the biggest problem!I think it will be a bit easier for me,because my dad is paying half and im paying half!Still a problem though!

What are your design ideas David?

Any pics of your feathers Erik?

Thanks.

Dan.

the best thing to do i found is plan then save, always have spare money for repairs

but i agree it is certainly hard at our age!:)

alex