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elektroda.net NewsGroups Forum Index - Electronic for beginners - Problem with Childs 12v 4x4 car - from an Electronics dummy!
BobbyDazzler
Guest
Guest
Wed Oct 12, 2011 4:47 pm
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Winston
Guest
Guest
Wed Oct 12, 2011 4:47 pm
BobbyDazzler wrote:
Quote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
cables but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Does it look like this?>
http://www.joemex.com/produce/77.asp?add=Product&add2=77 Series
--Winston
Tim
Guest
Guest
Wed Oct 12, 2011 4:47 pm
On Wed, 12 Oct 2011 07:47:01 -0700, BobbyDazzler wrote:
Quote:
I can test a circuit and check if there is powere on switches and cables
but that tis the total knowledge of electronics I have(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of electronics
I don't understand what is wrong? The only thing that is slightly
confusing is a small Joemex 77 series "thingy" which I believe acts as a
thermal cutout (assuming works for a period of time as there is no
button to reset it) Can anyone offer any words of wisdom?
but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of electronics
I don't understand what is wrong? The only thing that is slightly
confusing is a small Joemex 77 series "thingy" which I believe acts as a
thermal cutout (assuming works for a period of time as there is no
button to reset it) Can anyone offer any words of wisdom?
Yes -- something's broke. Isn't that helpful?
You say you can follow the current right through to the motors -- what do
you mean? When the accelerator pedal is depressed (I assume it's just a
switch), there should be 12V across the battery terminals, and nearly 12V
across the motor terminals. This means that the circuit path from the
battery '+' terminal to the motor '+' terminal should have very little
voltage drop, as should the path from '-' to '-'.
So, one way to chase this down is to hold down the accelerator, and trace
down the point where you have a 12V drop in the circuit, instead of in
the motor. When you find it, you've identified the bad spot.
--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
Winston
Guest
Guest
Wed Oct 12, 2011 4:47 pm
BobbyDazzler wrote:
(...)
Quote:
Does it look like this?>http://www.joemex.com/produce/77.asp?add=Product&add2=77Series
--Winston
Yes, except it doesn't have the threaded bit at the top, mine is black
and completely flat on the top.
--Winston
Yes, except it doesn't have the threaded bit at the top, mine is black
and completely flat on the top.
What Tim says.
Place your negative meter lead on the negative battery terminal.
With the 'accelerator' depressed, place your positive voltmeter
lead on one terminal of the Joemex breaker and note the reading.
Then place your positive voltmeter lead on the other terminal
of the Joemex breaker and note that reading. Both readings
should be about the same, 12 V or more.
--Winston
BobbyDazzler
Guest
Guest
Wed Oct 12, 2011 5:03 pm
On Oct 12, 3:50 pm, Winston <Wins...@BigBrother.net> wrote:
Quote:
BobbyDazzler wrote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Does it look like this?>http://www.joemex.com/produce/77.asp?add=Product&add2=77Series
--Winston
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Does it look like this?>http://www.joemex.com/produce/77.asp?add=Product&add2=77Series
--Winston
Yes, except it doesn't have the threaded bit at the top, mine is black
and completely flat on the top.
George Herold
Guest
Guest
Wed Oct 12, 2011 9:04 pm
On Oct 12, 10:47 am, BobbyDazzler <david.a.mitchel...@googlemail.com>
wrote:
Quote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
cables but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Do you have some way to check the switches (DMM perhaps). Several
years ago I pulled a few of these from the trash and found that the
rocker switches were shot. I replaced 'em with some toggle switches,
and away the boy went.
George H.
John Fields
Guest
Guest
Wed Oct 12, 2011 9:48 pm
On Wed, 12 Oct 2011 07:47:01 -0700 (PDT), BobbyDazzler
<david.a.mitchell66_at_googlemail.com> wrote:
Quote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
cables but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
---
Lift the wheels which are providing traction, switch it on, and place
a jumper across the accelerator terminals.
If the wheels spin you have a bad switch.
--
JF
Winston
Guest
Guest
Thu Oct 13, 2011 2:02 pm
BobbyDazzler wrote:
Quote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
cables but that tis the total knowledge of electronics I have
(
(...)
What did you find out, Dazz?
--Winston
Tim Wescott
Guest
Guest
Thu Oct 13, 2011 6:47 pm
On Thu, 13 Oct 2011 07:02:27 -0700, Winston wrote:
Quote:
BobbyDazzler wrote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
(...)
What did you find out, Dazz?
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have
(
(...)
What did you find out, Dazz?
Your public wants to know.
--
www.wescottdesign.com
Winston
Guest
Guest
Thu Oct 13, 2011 7:13 pm
Tim Wescott wrote:
Quote:
On Thu, 13 Oct 2011 07:02:27 -0700, Winston wrote:
BobbyDazzler wrote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
(...)
What did you find out, Dazz?
Your public wants to know.
BobbyDazzler wrote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have
(
(...)
What did you find out, Dazz?
Your public wants to know.
:)
--Winston
Winston
Guest
Guest
Thu Oct 13, 2011 9:00 pm
BobbyDazzler wrote:
(...)
Quote:
I haven't had a chance! I will post back when I have! Probably be
the weekend! Thank you all for your time and helpfulness!
the weekend! Thank you all for your time and helpfulness!
Winston > What Tim says.
Winston > Place your negative meter lead on the negative battery terminal.
Winston > With the 'accelerator' depressed, place your positive voltmeter
Winston > lead on one terminal of the Joemex breaker and note the reading.
Winston > Then place your positive voltmeter lead on the other terminal
Winston > of the Joemex breaker and note that reading. Both readings
Winston > should be about the same, 12 V or more.
Also try that same technique with your 'accelerator' switch.
You'll narrow it down to the problem, I am sure. :)
--Winston
BobbyDazzler
Guest
Guest
Thu Oct 13, 2011 10:51 pm
On Oct 13, 8:13 pm, Winston <Wins...@BigBrother.net> wrote:
Quote:
Tim Wescott wrote:
On Thu, 13 Oct 2011 07:02:27 -0700, Winston wrote:
BobbyDazzler wrote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
(...)
What did you find out, Dazz?
Your public wants to know.
:)
--Winston
On Thu, 13 Oct 2011 07:02:27 -0700, Winston wrote:
BobbyDazzler wrote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have
(
(...)
What did you find out, Dazz?
Your public wants to know.
:)
--Winston
I haven't had a chance! I will post back when I have! Probably be
the weekend! Thank you all for your time and helpfulness!
Rich Grise
Guest
Guest
Thu Oct 13, 2011 11:14 pm
BobbyDazzler wrote:
Quote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
cables but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Technically, you don't "follow the current" unless you have a current
probe. But your voltmeter should be enough. If, when you wire the motors
directly from the battery, they work fine, then it's either
the "accelerator" switch or that thermal fuse thingy.
Have Run!
Rich
BobbyDazzler
Guest
Guest
Sun Oct 16, 2011 10:35 pm
On Oct 14, 12:14 am, Rich Grise <ri...@example.net.invalid> wrote:
Quote:
BobbyDazzler wrote:
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Technically, you don't "follow the current" unless you have a current
probe. But your voltmeter should be enough. If, when you wire the motors
directly from the battery, they work fine, then it's either
the "accelerator" switch or that thermal fuse thingy.
Have Run!
Rich
I can test a circuit and check if there is powere on switches and
cables but that tis the total knowledge of electronics I have
(
I was given a childs 12v rideon 4x4 which wasn't working. If I switch
it on and press the accelerator pedal (swtch) nothing happens. I have
replaced the battery and can follow the current right through to the
motors but nothing happens. I have wired the motors directly from the
battery and they work fine. With such a basic knoweldge of
electronics I don't understand what is wrong? The only thing that is
slightly confusing is a small Joemex 77 series "thingy" which I
believe acts as a thermal cutout (assuming works for a period of time
as there is no button to reset it) Can anyone offer any words of
wisdom?
Technically, you don't "follow the current" unless you have a current
probe. But your voltmeter should be enough. If, when you wire the motors
directly from the battery, they work fine, then it's either
the "accelerator" switch or that thermal fuse thingy.
Have Run!
Rich
Now I'm even more confused than when I started!
I have managed to "follow the current" right up to the motors without
them working! I'll try and explain the wiring. AS well as the
accelarator switch there are also 2 switches which form the "gears"
forward and reverse. If they are both swu=itched one way the wheels
are druiven forward, if they are both switched the other weay the
wheels are driven in reverse. One of the switches contains the
thermal cutout. I'm going to bypass these and see if it works. Will
report back shortly!
Winston
Guest
Guest
Sun Oct 16, 2011 11:18 pm
BobbyDazzler wrote:
(...)
Quote:
Still not working, think I need to buy some new switches and rewire
the whole thing!
the whole thing!
Without a schematic it is difficult to offer
much of value. It sounds like the battery
is flat and needs a recharge.
Switching direct current is a much larger problem
than switching alternating current because once
an arc starts in an improperly specified switch,
it can continue until the switch breaks.
Advise you locate a voltmeter (DMM) and take
some readings as we outlined earlier.
Good luck!
--Winston
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