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Repo info
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Baruch Even
@baruch
Add a start callback for HTTP updater #1817
Stavros Korokithakis
@skorokithakis
oh it does say 9.6v
Baruch Even
@baruch
BTW, who is doing the merges of the pull requests?
tzapu
@tzapu
thanks @ivankravets did all that, i was just wondering on the arduino h , as i never included it before. cheers, compiled and uploaded a project, tis nice
Stavros Korokithakis
@skorokithakis
hmm, i'm getting an error on the min and maxfunctions, what's the right name to use?
ah, std::min and std::max
Martin Ayotte
@martinayotte
There is a conflict if I remember with <std>. In Arduino.h, to workaround the issue, there are macros _min/_max .
Stavros Korokithakis
@skorokithakis
ah, thanks
Michael Miller
@Makuna
@skorokithakis You are better off using a RC speed controller and just use the Servo library to talk to that.
Stavros Korokithakis
@skorokithakis
@Makuna what's an RC speed controller?
oh, a complete black box?
Stavros Korokithakis
@skorokithakis
oh that looks great
what does it do? same as the h-bridge i bought?
Michael Miller
@Makuna
Yes, but they are smart. This one has brake but no reverse, if you need reverse, just search for one with reverse.
They take a standard hobby Servo input and use that to control the voltage on the DC output, including the ability to reverse (if it has the option).
Some of these have actually ATMEL AVRs in them, and can be programmed with Arduino ;-) But it is sort of a hack.
Stavros Korokithakis
@skorokithakis
oh hmm
yeah, i need one with reverse.. let me look
hmm, i'm not familiar with these... do i need 20 amps?
Stavros Korokithakis
@skorokithakis
@Makuna any ideas? i'm completely lost with these
Michael Miller
@Makuna
What size is the motor?
Stavros Korokithakis
@skorokithakis
no idea :/ this is a car i've had for 20 years
Michael Miller
@Makuna
What RC car is it?
Stavros Korokithakis
@skorokithakis
just dug it up and figured i'd stick an ESP on it
Michael Miller
@Makuna
1/10th scale? Toy?
Stavros Korokithakis
@skorokithakis
great question
i have no clue how you'd measure these :/
Michael Miller
@Makuna
usually you find the label on it ;-)
Does it seem cheap or does it seem to be serviceable with accessible and removable parts?
Stavros Korokithakis
@skorokithakis
it seems cheap, it has two motors i can't access and it had a pcb i removed
it's a nikko car
i measured the power draw from the wall socket and it was 3A when i held the motor down so it couldn't move
but that may have been the limitation of the PSU
Michael Miller
@Makuna
probably, as even the cheap motors can draw a lot when stalled.
Stavros Korokithakis
@skorokithakis
yeah
hm
so those 3A bridges i bought probably won't work either, huh
Michael Miller
@Makuna
For an example, a 1/10th Scale RC car can draw 40 amp with the motor stalled.
Stavros Korokithakis
@skorokithakis
jeez
if i go down to the rc car store and ask them, will they know what to give me?
Michael Miller
@Makuna
Many of them have a clutch in them so they never stall the motor as much as burn the clutch.
Stavros Korokithakis
@skorokithakis
ah, this one is just straight-up connected to the wheel
Michael Miller
@Makuna
They should be able to help. How big is it (dimisions)
Stavros Korokithakis
@skorokithakis
about 25x20cm
Michael Miller
@Makuna
Ok, 10amp should be fine, 20amp on the large size.
Stavros Korokithakis
@skorokithakis
great, thank you
i needed a battery and charger for it anyway
maybe i'll just buy a body and two motors too
Michael Miller
@Makuna
If you think you might be doing more robotics/RC/quads, get a good flexible charger to start with. The new ones charge LiPos which is handy for charging scrap batteries from old laptops or cellphones.