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I saw some papers regarding rotational matrices but I did not understood it very well, or how to break complicated equations into more simple operations which can be transposed in assembly language. Connecting calibration equations with rotation equations is my real problem. I will study it...
Hi all,
Maybe a lot of years ago my math was in better shape, but now it is gone, so I need some help.
I need to rotate a coordinate system. I have an accelerometer which gives me accelerations on all 3 axes, X, Y, Z as 8 bit signed values. The accelerometer is mounted on a mobile platform but...
Yes, I know this one, but please read what I wrote in the first post:
I deselected all layers except connections and keepout and the broken connection was not visible, exactly for the reason explained above.
I solved the problem by looking at each trace from one end to the other, through all layers. It was a teadious work, but it was the only way. I could not find any tool to help me after browsing all the options from protel.
Hi all,
I know they are somehow similar but I do not yet understand all the subtilties of MSK and GMSK modulations, so I have a question:
Can a receiver such as CC113L from TI, which is capable to receive MSK modulated signals, to receive also GMSK modulated signals?
I am not interested in...
Hi,
I am using protel 99se for a 4 layer pcb. I finished it but the report/ board information, at routing information tells me I have 1 unconnected net.
Usually unconnected nets are visible on 'connections' layer. However, I encountered over the years situations when an unrouted connection is...
Hi all,
For a manufacturing process of terminals which contains GSM modems, I currently use two communication analyzers for testing the devices after assembly. One is a HP8922M (GSM/DCS/PCS mobile station test set), this is quite old unit, it is good for testing registration of mobile unit and...
If it works fine without sim card and restart with sim card then 99% your problems occur when the module tries to register into the network and it consumes high current from the power supply. If your power supply is capable to deliver 2A continuously that does not mean it is capable to withstand...
Hi all,
I need to design an array of wireless sensors, powered from a CR2032 coin battery. The sensors will be attached to a PCB which is approx. the same size as the battery. The variety of sensors (temperature, humidity, etc) and the quantity (maybe 1000 pcs) are not suitable to make me think...
Hi all,
I need an european supplyier of electrochemical sensors for application is scuba industry.
I need an oxygen sensor capable to measure between 0-100% O2, an carbon monoxide sensor with good sensitivity and precision (around +-1..2 ppm and range 0-few hundreds ppm) and a helium sensor...
No, I did not but that was not the problem.
I just solved it, the GND pin of the connector was not correctly soldered to the board. It was hard to notice since it is a smd connector with pins under it, not on a side.
The card was drawing gnd through protection diodes on pins, since some of...
Using a file system will allow you to insert that card in any windows/linux/android/mac machine and to read/write files, directories aso. Writing raw data, without a file system will make that card usable only for an application which reads raw data from the card and that application must know...
Small update after some more tests:
-after first loop of CMD55+ACMD41, the card is actually release control of MISO line, it is in high impedance state until next CMD0. If I put a pullup resistor, the line will stay in 1 indefinitely, regardless of the sent command. If I put a pulldown, will...
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