when i only connect the powersupply and nothing else the voltage on the 5V DC is 4.81 VDC ?
on both my Netduino's ? So what could be wrong then ?
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Help on I2C
Started by Frank Beerens, Mar 15 2014 10:28 AM
55 replies to this topic
#41Posted 12 April 2014 - 06:31 AM when i only connect the powersupply and nothing else the voltage on the 5V DC is 4.81 VDC ? on both my Netduino's ? So what could be wrong then ? #42Posted 12 April 2014 - 02:51 PM hi
where do you live, could it be an idea to send display bread board and netduino to you for testing ? (incl power power supply ?) #43Posted 12 April 2014 - 09:44 PM I live in the US. I think you will learn more by me walking you through the steps of troubleshooting the hardware. Even if you are only interested in software. A software person with good hardware skills is very desirable.
Anyway, let me do some testing on my Netduino Plus 2 tomorrow and I will get back to you with some things to try. #44Posted 13 April 2014 - 05:55 AM ok thanks. I will wait for your testing #45Posted 14 April 2014 - 02:07 AM
Frank,I measured the 5V railed and 5V header on my Netduino Plus 2 this evening running from a 9V, 1A power supply. The outputs were both right at 5V (with no load on the 5V header). I am putting something together for you to help your test and troubleshoot your hardware. I will send it to you tomorrow when I finish it up.
When you say nothing else connected, does that mean the LCD is disconnected? #46Posted 14 April 2014 - 02:13 AM
Also if you could send some good pics of your setup that would help, too. And are you using a good DMM to make your measurements (I.e. Are you confident with its readings)?
#47Posted 14 April 2014 - 06:07 AM hi studied electronics so i should know what i am doing !! it is a long time ago i did something with it.
See attachments for pics.
Red is +5V Green is gnd Attached Files#48Posted 15 April 2014 - 12:15 PM Remove the RED wire connected to P1.1 of the display. You shouldn't have 5V tied to the RX pin. Actually since you aren't using the UART interface, you can leave P1 completely disconnected (VDD and VSS connections are already made on P2). After doing this remeasure the voltages and ensure you are getting the proper 5V to the display. #49Posted 16 April 2014 - 08:51 PM Vin 8,72 5V on netduino 4.69 SD 4.64 VDC SC 4.63 VDC
you mean the left red wire.on the connector with 3 pins ? #50Posted 17 April 2014 - 01:00 AM Yes. You can disconnect all wires from the 3 pin connector on the left. #51Posted 17 April 2014 - 10:52 AM ok i did that then the measurement are as in the previous post #52Posted 18 April 2014 - 08:10 PM what would be the next step, buy a new one ? #53Posted 18 April 2014 - 08:57 PM
No I don't think you need to buy a new one...yet. I have been on travel but should be able to send you something this weekend to help you troubleshoot.
#54Posted 23 April 2014 - 09:02 PM hi did you find any time :-) #55Posted 06 May 2014 - 08:34 PM i bought a new netduino and a new display but still the same.
can somebody help me ?
Some one in the Netherlands or Belgium or Germany which can help me local #56Posted 26 May 2014 - 07:10 PM no one who can help me ? 0 user(s) are reading this topic0 members, 0 guests, 0 anonymous users | ||||||||||||||
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