Q: Which IC chip in Lego duplo electric train engine?
Christoph Draxler
Hi,
our boy's Lego duplo electric train (4.5 V) recently broke down. I
opened it only to discover a 16-pin IC chip with a coded number (my
electronic parts dealer told me so). Before getting a ~50$ new train I'd
like to repair the one we have...
So, what is the "real" number of the IC in this train engine? The coded
number is
H7057-16PI
E2694000
R-(mu)EM93-09C
on top of the chip, and
H7057 - 694000
on the bottom.
What other chip can I use as a replacement?
Any help is greatly appreciated - if possible by e-mail because I don't
read this group very often.
Thanks,
Christoph
--
------------------------------------------------------------
Christoph Draxler
Department of Phonetics and Speech Communication
Ludwig-Maximilian University Munich Tel: +49 +89 28669968
Schellingstr. 3 Fax: +49 +89 280 0362
D 80799 Munich e-mail: dra...@phonetik.uni-muenchen.de
------ http://fishmac.phonetik.uni-muenchen.de/ ------------
Dave Baum
Christoph Draxler wrote:
>
> Hi,
>
> our boy's Lego duplo electric train (4.5 V) recently broke down. I
> opened it only to discover a 16-pin IC chip with a coded number (my
> electronic parts dealer told me so). Before getting a ~50$ new train I'd
> like to repair the one we have...
>
> So, what is the "real" number of the IC in this train engine? The coded
> number is
>
> H7057-16PI
> E2694000
> R-(mu)EM93-09C
>
> on top of the chip, and
>
> H7057 - 694000
If I had to guess, I'd say EM93-09C is the timestamp of when the chip
was packaged (September 93).
The H7057-16PI number looks like a part number. Assume H is the general
family of the part, 7057 is the number itself, -16PI indicates some
variant (such as 16 pin plastic DIP package, etc.)
Is there any sort of logo or insignia that indicates the manufacturer of
the part? If not, you may want to search the web for 7057.
Any idea what the part does? How is it wired to the rest of the
locomotive? It should be possible to fix the engine by replacing the
electronics even if an identical part can not be found.
Dave
--
To reply, remove "nospam" from the address above.
Larry Pieniazek
Dave Baum wrote:
>
> Christoph Draxler wrote:
> >
> > Hi,
> >
> > our boy's Lego duplo electric train (4.5 V) recently broke down. I
> > opened it only to discover a 16-pin IC chip with a coded number (my
> > electronic parts dealer told me so). Before getting a ~50$ new train I'd
> > like to repair the one we have...
> >
A recent thread to this group on this same topic concluded that this IC
probably is either a Programmable microcontroller or an ASIC. That was
based on analysis of the parts count and connectivity of the rest of the
components, as well as the function that the train performs (reversing
on sensors, etc)
I used to write software that IBM engineers use to design new chips and
circuit boards. IMHO, that thread probably reached the right conclusion.
That's bad news for any effort to replace this, as unless you have a
PROM burner (if it's a microcontroller) , or want to design a controller
of your own (if it's an ASIC) you're probably out of luck. Even if you
do, you may need the original designs to understand the sensor function
and use. (is it an NC or NO sensor, for example, is it passive or
active? If active, what voltage do you have to supply it, etc...)
Electronics isn't the same as when you could use an o-scope, and basic
knowledge of radio circuits to fix a busted set by probing one step at a
time through the transformations.
Christoph Draxler
Hi there,
Dave Baum wrote:
>
> Christoph Draxler wrote:
> >
> > Hi,
> >
> > our boy's Lego duplo electric train (4.5 V) recently broke down. I
> >...
> >
> > H7057-16PI
> > E2694000
> > R-(mu)EM93-09C
> >
> > on top of the chip, and
> >
> > H7057 - 694000
>
> If I had to guess, I'd say EM93-09C is the timestamp of when the chip
> was packaged (September 93).
>
> The H7057-16PI number looks like a part number...
> the part? If not, you may want to search the web for 7057.
no success - in chip directories I find 7057 as audio amplifiers (Philips)
> Any idea what the part does? How is it wired to the rest of the
> locomotive? It should be possible to fix the engine by replacing the
> electronics even if an identical part can not be found.
the chip toggles the motor on and off and plays a beep sound via a built-in
(piezo-cristal) speaker. There are two types of switches on the board: one
that connects while it is pressed (operated from the top of the train), and
two for forward, backward and off (if both are pressed simultaneously) on the
bottom. So I gather the chip has some XOR logic, a flip-flop and an oscillator
function...next to the chip there's a little capacitor, and the place reserved
for a Zener-diode is empty. The board itself is labelled DONGWEI JW-1287 and
9326 (in 7-element display style; the production date, I think). That's all
there is!