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The 2024 Embedded Online Conference

CHARGE-TRANSFER TOUCH SENSOR QUERY

Started by patil in comp.arch.embedded19 years ago 1 reply

Hi All For our ongoing project we are using QT113H-D.We made one PCB in that we have provided 3 rounds of copper strip with 80 mil as...

Hi All For our ongoing project we are using QT113H-D.We made one PCB in that we have provided 3 rounds of copper strip with 80 mil as a electrode . And also X76 Series (0.1 uF)capacitor across SNS1 and SNS2 pins to increase the sensitivity. I want to increase the sensitivity with this set up, now i am able to achieve a sensitivity of about 4 Inches . What should i do in this setup...


LONWorks vs. Ethernet

Started by Randall Nortman in comp.arch.embedded19 years ago 25 replies

I need to build some little devices to install throughout a small building, each of which will take readings from 2-6 analog sensors (10-bit...

I need to build some little devices to install throughout a small building, each of which will take readings from 2-6 analog sensors (10-bit resolution, 1 sample/sec is plenty). Some of the pods will also need to drive a few low-power relays. I want the networking to be all digital, with the sensor readings going back to a headless Linux PC, which also sends signals back to open and close t...


Boxed MCU with RS-232 Port

Started by Rick C in comp.arch.embedded12 months ago 153 replies

The unit only really needs one serial port, but it is more convenient to have two connectors, so I guess it needs to ports. One port will only...

The unit only really needs one serial port, but it is more convenient to have two connectors, so I guess it needs to ports. One port will only receive and the other only transmit, no handshaking. The function is pretty simple. A sensor sends a line of about 50 chars, at 9,600 bps, once per second. This box counts 20 lines and adds a header. So nothing fancy is required of the MCU. There ...


High speed USB devices

Started by Mikko OH2HVJ in comp.arch.embedded13 years ago 24 replies

Hi, I'm building a custom USB-camera. There will be an FPGA chip doing some simple data handling for the sensor data and after that the image...

Hi, I'm building a custom USB-camera. There will be an FPGA chip doing some simple data handling for the sensor data and after that the image needs to be transmitted to a PC or an embedded Linux computer. Estimated raw data rate is almost 30 megabytes per second without any compression. Basically a single endpoint is enough for the task. What are the available chips in addition to Cy...


Terms in automotive electronics

Started by Konki in comp.arch.embedded20 years ago 7 replies

Hello World, I am trying to make a device to measure the fuel level in a scooter. It is fitted with a fuel level sensor and I think I can...

Hello World, I am trying to make a device to measure the fuel level in a scooter. It is fitted with a fuel level sensor and I think I can find the details. This is not the issue, just the background. :-) While I was searching for some information regarding automotive electronics for this project, I came across many articles where the different cables/signals in automobiles are la...


advice for the right parts for a tiny device: data collection and transmission

Started by Anonymous in comp.arch.embedded16 years ago 2 replies

hello, im using some hobby time to make a device which collects data from a remote temperature sensor and then performs some...

hello, im using some hobby time to make a device which collects data from a remote temperature sensor and then performs some rudimentary corelation analysis and stores it on board (about 8-16MB) for sometime. Later it will be transmitted using a class 3 Bluetooth transmitter to my PDA. Im clueless as to the best components out there. Im looking at each to have a really small size (of les...


ARM board features?

Started by Hazard in comp.arch.embedded14 years ago 3 replies

Hello all, I am looking for a controller board using a 32 bit ARM processor. I have three different projects I would like to work on, and would...

Hello all, I am looking for a controller board using a 32 bit ARM processor. I have three different projects I would like to work on, and would like to use the same base board for each. I would like a board that would be suitable for all of the following, but not all at the same time, each project is different: - monitor temp sensor - monitor voltage - monitor alarm inputs from detecto...


Recommendations for a Quadrature Decoder IC or MicroController

Started by benn in comp.arch.embedded16 years ago 13 replies

I have an atmega16 that interfaces to a motor with a quadrature encoder sensor. Turns out the frequency of the pulses are much more than my...

I have an atmega16 that interfaces to a motor with a quadrature encoder sensor. Turns out the frequency of the pulses are much more than my little 4Mhz can handle (the micro does other things as well!) As a result, the motor control isn't very accurate, nor does it react very fast. SO.. I'm looking for either a quadrature decoder IC that can take the load off (will calculate position/vel...


16-bits ADC anyone?

Started by Bruno Richard in comp.arch.embedded17 years ago 44 replies

Hi all, I am working on a project where I need some 16 bits ADC to retrieve information from a sensor. I also need a small microcontroller...

Hi all, I am working on a project where I need some 16 bits ADC to retrieve information from a sensor. I also need a small microcontroller such as a PIC, AVR or 8051, and I got surprising quotes for the ADC: Around $5 (qty 1000), which is 5 times more expensive than the controller! Does anyone have an idea about how I can get some low cost ADC- Controller solution? I need only few dozens...


Re: Which embedded system would you use?

Started by Sink0 in comp.arch.embedded13 years ago 1 reply

On May 4, 10:11=A0am, 1 Lucky Texan wrote: > On May 4, 6:36=A0am, Sink0 wrote: > > > > > > > > > > > A research, >...

On May 4, 10:11=A0am, 1 Lucky Texan wrote: > On May 4, 6:36=A0am, Sink0 wrote: > > > > > > > > > > > A research, > > > Which digital and wired communication system would you use for the > > following robotic system. > > > A system composed by a PC/104+ (it is just a very compact standard PC) > > with Xenomai (or maybe RTAI), and some sensor


Faster temperature measurement when temperature compensating?

Started by HJ in comp.arch.embedded17 years ago 8 replies

How can I speed up the procedure when I temperature calibrate unit X? Must I wait for the temp to stabilize at a given temperature before...

How can I speed up the procedure when I temperature calibrate unit X? Must I wait for the temp to stabilize at a given temperature before measuring or is it possible to measure "on the fly" as the temp increses and not waiting for it to stabilize? The temp sensor is internal to the device (in the same IC package).


Interfacing SJA1000 CAN controller to embedded PC

Started by Anonymous in comp.arch.embedded12 years ago 12 replies

I have a project coming up which will involve 5 - 10 CAN nodes, implemented in ARM9 microcontrollers. The CAN bus will run a 1Mbit, using...

I have a project coming up which will involve 5 - 10 CAN nodes, implemented in ARM9 microcontrollers. The CAN bus will run a 1Mbit, using 11 bit identifiers. About half the nodes will be in the same physical box, the others will be in various sensor / user interface boxes connected via short lengths of cable. There is also an embedded Windows PC in the main box, which we want to use...


Embedded fingerprint sensor SDK

Started by ted in comp.arch.embedded18 years ago 8 replies

We want to add a fingerprint biometrics swipe module to our embedded system. Can anybody recommend a relatively cheap product plus SDK that...

We want to add a fingerprint biometrics swipe module to our embedded system. Can anybody recommend a relatively cheap product plus SDK that includes recognition, validation and authentication software for an (ARM based) embedded system? Thanks in advance Ted


ATmega8515 power consumption

Started by Meindert Sprang in comp.arch.embedded18 years ago 16 replies

I am struggling to get the power consumption of sensor device down. According to the datasheet (page 208, top graph), the ATmega8515 I use,...

I am struggling to get the power consumption of sensor device down. According to the datasheet (page 208, top graph), the ATmega8515 I use, uses slightly less than 1mA @ 3.3V and 1MHz internal clock while active. But I measure around 2.3mA. Even when I stop all I/O and go into an endless loop, it still uses 2.1mA. Is Atmel showing off here or am I missing something? Meindert


timestamping data

Started by PecosBill in comp.arch.embedded13 years ago 1 reply

Hello, Im using an HCS12 MCU interfaced with an E-field sensor and a 300ksps ADC inorder to record the electric field coming from an EMP...

Hello, Im using an HCS12 MCU interfaced with an E-field sensor and a 300ksps ADC inorder to record the electric field coming from an EMP bomb. the phenomenon will only last a few milliseconds, maybe microseconds and i want to timestamp the data, which will then be processed in matlab to display magnitude versus time plots. Can anyone point me in the right direction on data timestamping w/ an ...


Need help with Netburner SB72IO timing interface

Started by eric in comp.arch.embedded19 years ago 1 reply

This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C4D617.32223130 Content-Type:...

This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C4D617.32223130 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable We plan on using a GPS PPS signal that will be used to update the = internal clock on each net burner (one for each application/sensor). One = issue we are currently trying to resolve is how best to handle th...


Low cost TCP/IP platform

Started by Gavin Jacobs in comp.arch.embedded19 years ago 10 replies

I'm about to do some work with UPnP. The platform I need is described below. Any suggestions? The specs are: a) Any small embedded...

I'm about to do some work with UPnP. The platform I need is described below. Any suggestions? The specs are: a) Any small embedded microprocessor c/w a multitasking OS and a TCP/IP stack b) 10BaseT Ethernet interface c) A few discrete I/O and a 1Wire interface for the Dallas temperature sensor The development specs are: i) Any free or open source compiler (C preferred, but will consider ...


temperature / voltage sensor recomendation?

Started by Adib Taraben in comp.arch.embedded17 years ago 1 reply

Hello, In my next uC design I need to check periodically battery and uC temperature and battery and power-supply voltage. I do not have a...

Hello, In my next uC design I need to check periodically battery and uC temperature and battery and power-supply voltage. I do not have a native I2C nor 1Wire on the uC wherever CAN or SPI or some IOs are available. What I prefer would be a kind of simple 2wire interface to some small and handy sensors. Some recommendations ? Are there some don't use sensors? Thx, theAdib. -...


microcontroller with built-in op-amp

Started by Robert Scott in comp.arch.embedded19 years ago 11 replies

I know there are micros with built-in comparators, but are there any that have a built-in rail-to-rail op-amp suitable for conditioning...

I know there are micros with built-in comparators, but are there any that have a built-in rail-to-rail op-amp suitable for conditioning a strain-gage bridge sensor and reading the results on an A/D? -Robert Scott Ypsilanti, Michigan (Reply through this forum, not by direct e-mail to me, as automatic reply address is fake.)


Barometric pressure and rain gauges

Started by Neil Bradley in comp.arch.embedded20 years ago 13 replies

I'm currently designing a replacement main board for my Heathkit ID-5001 weather station. I already have replacement relative...

I'm currently designing a replacement main board for my Heathkit ID-5001 weather station. I already have replacement relative humidity, windspeed/direction, and temperature sensors, but I'm looking for a barometric pressure and and rain gauge sensor solution. By any chance is anyone aware of an I2C or SPI based device that can provide this functionality? Or better yet, is there anyone that ca...



The 2024 Embedded Online Conference