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Hello, i would like an inverter circuit,diagram, with a mppt charge controller inbuilt and running on an Atmega328 michrochip. Components should stricttly be through hole.
I need to develop an infrared laser 'shield' to detect high velocity projectiles traveling through. The laser 'shield' will be mounted in front of a cardboard target, and will have to give an responsive feedback to the user-system of where the hit occurred. To ensure precision, the laser shield have to respond up to 150 000 times pr. second - as the fastest moving projectiles used on this project will be moving 140 000cm each second. This is a project under development, and is still in early-alpha stages. I am looking to establish contacts regarding the subject, so that when the time comes - I can take contact again to develop the product. Please take contact if you are interested, or have any questions regarding the project. Thank you for your time.
Hi, i need someone who understands a bit more about Sniffing GSM using RTL-SDR USB would like to know what kind of gsm/rf frequencies are around me. Spectrum analyzer software could be used. I have bought the hardware 100 kHz 1.7 GHz Full Band UV HF RTL SDR USB Tuner Receiver R 820 T 8232. Read Less
Designing a low-frequency filter with the following characteristics. Supply is +5V and GND. The filter should have a gain of -10 (inverting). (Gain in this context might sometimes be referred to as AC-gain) The filter should have a bandwidth of 1kHz. The filter should be able to drive a 100 Ohm resistor. You should make a design with an opamp (try and select one) and back your findings with simulations in time as well as in frequency. Secondly, try and make the same amplifier with one bipolar transistor. It should be simulated in LTSPice
Hi there, I would like to control 5 stepper motors with an arduino to work in a specific sequence. I have no experience, and have never coded, but have a fun little project to do and have been told that it is an easy job for someone who knows what they are doing. The motors and drivers I have can be found in the below link. I do not know if the code or information they give in the link is completely accurate though. It might be better to use accell stepper library? [url removed, login to view] So I would like to coordinate the motors to work in a certain order after pressing a button as described below and be able to change the following variables (RPM, degrees of rotation/steps, start time, stop time). If you can think of other or better variables to use as well it will be great : 1. Press a button 2. t=0 : Immediately after pressing the button, Motor A turns for 30 seconds and then stops (I would like to be able to adjust RPM, degrees/steps, start and stop time). This motor will continue to operate whilst the next motors turn on and off in the desired sequence. 2. t=5 : After 5 seconds from pressing the button, Motor B turns for 1 full roation and then stops (I would like to be able to adjust RPM, degrees/steps, start and stop time) 3. t=10 : After 10 seconds from pressing the button, Motor C turns for 1 full rotation and then stops (I would like to be able to adjust RPM, degrees/steps, start and stop time) 3.1. t=12 : After 12 seconds from pressing the button, Motor C turns in the opposite direction for half a rotation and then stops (I would like to be able to adjust RPM, degrees/steps, start and stop time) 3.2. t=13 : After 13 seconds from pressing the button, Motor C turns in the opposite direction for half a rotation and then stops (I would like to be able to adjust RPM, degrees/steps, start and stop time) 4. t=15 : After 15 seconds from pressing the button, Motor D turns for 1 full rotation and then stops (I would like to be able to adjust RPM, degrees/steps it rotates, start and stop time) 5. t=20 : After 20 seconds from pressing the button, Motor E turns for 1 full rotation and then stops (I would like to be able to adjust RPM, degrees/steps, start and stop time) I have been told that it is also possible to program these using just 2 pins instead of 4. This will be very helpful if you can do this as I have limited pins on the arduino board. I would also like to know how to wire the button and motors in the simplest way. I would like the code to be as simple and robust as possible, easy to understand and easy to adjust the variables. I will then be adding features like touchscreen instead of the button so there is opportunity for more work for the person who does this. Any help will be hugely appreciated.
Pretty simple. Need a website built for an automotive repair shop. Would like it to have an embedded blog. I know enough about php and html to edit the site which is what I want to do as I expect to make changes.
I work at a crash test facility and we use a lot of piezoresistive accelerometers. That being said, we need to be able to quickly check the functionality of the accelerometers before we put them in a car for a test. So I need someone to build a handheld device that can measure and tell me the resistance on both sides of the wheatstone bridge inside of the accelerometer.
We find an electronic expert designer to customize an hardware based on VIDEO Sitara Processor TI AM5728. All documentations are provided by Texas Instruments (Gerbers + BOM + all required ). We want to 'add' to the basic Ti HW some input/output : HDMI, HD-SDI, Audio, SATA port, ... I send more detail on demand.
We are looking for someone to build Hardware on very thin foil sheet which can can Read and Store EMV Chip Card Data. Please only bid if you are capable of doing it and have all the things needed or can arrange to do so. Rest of the Project Details will be provided upon contact.. Plz check Attachment for little details
I want a software, with which I can turn on/off my office lights, airconditioners, and other machines. for this purpose I need automation using arduino board with electrical wiring etc and other stuff needed for that.
Create from zero a GSM data receiver able to capture wireless info sent via network i need a GSM Reciever/Sniffer built or someone who has one please contact me for more details. the individual i assume will need to have experience in electronics and some coding.
actually tell me how to fix the 4 door lock with 4 led using 1 adapter currently now i using the series circuit for relay but how to change to parallel circuit pm to find out more because currently i found that may not be the software problem as i able to power up 1 adapter with 1 lock and led but when combine 4 lock with 4 led then the lock not enough current to draw, but how to do in parallel?
I require a small circuit design for 905nm AD500-9 TO52S1F2 APD/Avalanche Photo Diode with 905nm Bandpass Filter Lens. Please see attached files for High Level Overview and APD notes. This circuit is only to detect/receive and thus amplify 905nm pulses of light from the APD and output via the OpAmp suitable for Arduino to recognise on its input pins. The circuit shall provide the power required for the APD and the OpAmp required. The source DC voltage is 5v - 12v. Power from Arduino +5 if possible is highly regarded if the current source is ok! The OpAmp will need to amplify for Arduino to see the signal/pulse received by the APD as I believe the output of the APD may be too low for Arduino to recognise otherwise. 1) I need a schematic / circuit layout that I can follow to purchase the required parts (resistors, OpAmp IC, caps, transistors etc.) and breadboard test for proof of concept. 2) It would be good if I could have the recommendation design/information required to have a PCB manufactured. 3) A recommendation for good simulation software that I can observe the circuit working etc. (e.g. LTspice) 4) Testing / sample code (if possible) of it working on Arduino (for example, the Arduino serial monitor is showing detection of 905nm light received by the APD). Strongly regarded in my selection criteria! 5) Provide the explanatory notes if possible. Any questions please let me know.