| View previous topic :: View next topic |
| Author |
Message |
eNzoTe
Nou Venit
Joined: 08 May 2012
Posts: 6
|
 Posted: Mon Jul 02, 2012 1:25 pm Post subject: Don't have tester to check output voltage |
 |
|
Hi Victor & friends,
I've checked Driven Serial I2C with Interface Tester v2.0
the result is
SDA in: 1
SDA/SCL out: 1 & 0
but I don't have tester to check output voltage
whether it can be assumed that there will be no damage to the chip
if I do it?
Thanks |
|
| Back to top |
|
 |
eNzoTe
Nou Venit
Joined: 08 May 2012
Posts: 6
|
| Posted: Mon Jul 02, 2012 3:03 pm Post subject: |
|
|
ERROR: Circuit not found or bus error!
Did I wrong?
found here
seems like there's something with layout |
|
| Back to top |
|
|
victor
S.F. Boss
Joined: 07 Mar 2004
Posts: 2581
Location: Staff
|
| Posted: Mon Jul 02, 2012 3:53 pm Post subject: |
|
|
First thing I see is that the resitors are not 4.7K but something like 47 Ohms. Anyway check them
One thing to know: Sellers at radioshack are blatant idiots so better have your items checked with a multimeter, before leaving.
For the rest give me some more time.
_________________
Victor Voinea
ALLservice HQ, Romania. |
|
| Back to top |
|
|
eNzoTe
Nou Venit
Joined: 08 May 2012
Posts: 6
|
| Posted: Tue Jul 03, 2012 2:08 pm Post subject: |
|
|
with Simple Programmer
SDA in: 0
I don't know if it's inverted or not |
|
| Back to top |
|
|
victor
S.F. Boss
Joined: 07 Mar 2004
Posts: 2581
Location: Staff
|
| Posted: Tue Jul 03, 2012 2:11 pm Post subject: |
|
|
The resistors are 22 OHM, not good.
I also think that cable is nullmodem or maybe it is a USB2COM. loose it.
_________________
Victor Voinea
ALLservice HQ, Romania. |
|
| Back to top |
|
|
eNzoTe
Nou Venit
Joined: 08 May 2012
Posts: 6
|
| Posted: Tue Jul 03, 2012 3:17 pm Post subject: |
|
|
| victor wrote: | | The resistors are 22 OHM, not good. |
seems true for the order except R
Red=2
Red=2
Black=0
Brown=0 (1 digit)
Brown=~1%
excuse me for stupid questions
if it is true the result is 2200 Ohm ~1%, right?
or I need to use
Red=2
Red=2
Red=00 (2 digit)
| victor wrote: | | I also think that cable is nullmodem or maybe it is a USB2COM. loose it. |
Yeah, that's right I use USB2COM
which part should be loosened?
connector USB or? |
|
| Back to top |
|
|
victor
S.F. Boss
Joined: 07 Mar 2004
Posts: 2581
Location: Staff
|
| Posted: Tue Jul 03, 2012 3:42 pm Post subject: |
|
|
They must be red, red, red.
What is after black line are decimals and then the gold and silver for tollerance and the temp
But ive seen so many notations, so the best way is the ohmeter
_________________
Victor Voinea
ALLservice HQ, Romania. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
