#Aliens motion tracker sound movie#

He mentions that there is a motion sensor as well, but is a bit vague about how that part of the build works.

The device can easily track your own movement, as it contains both a GPS module and an electronic compass. build captures that feeling, with the steady beat of sonar and the rising pitch of a ping as an object moves towards you.

#Aliens motion tracker sound movie#

For our money, the most brilliant part of that movie was the use of rhythmic sounds to boost the intensity of the tension in the viewer. YouвЂ™ll immediately remember this prop after seeing and hearing it in the video after the break. This time around heвЂ™s making the motion detector device from the original Alien movie. 90% of it was done this way with just a few things needed to be soldered when they were already on the skeleton - it is really tight in there and very difficult to get a soldering iron of any size in there - kinda tricky.Likes to recreate movie props that actually work. The electronics build plate was designed so that as much as possible could go straight down onto the plate and I used solid core wires so the wires could be soldered on to the boards, then the boards with wiring already done could just be placed straight down onto the plastic skeleton. The top black half shell goes straight down onto the the green bottom - but about 1 cm back - then you push it forward into the bezel and there are two screws the go up from the bottom green shell into two captive square nuts in the top black shell that are inserted into slots that get covered by the back plate. The bezel has a 1mm deep groove on the bottom half of the inside edge that mates with a 1mm ridge on the lip of the bottom half shell, you put one corner of the bezel in at about 45 degrees and rotate it onto the green lip/ridge and it lock in place. I will see what I can do about the video, here are some shots of how it all fits together in the housing. The are other more RADAR-ish devices that really do measure the doppler effect but none of them look like they would really work, still waiting for a real radar to appear for hobbyists. It will run for at least one hour on a single charge. If you leave this on a nearby table and donвЂ™t move around too much and someone approaches the tracker starts going off and it is kind of creepy and fun. The animation and sound effects are fairly simple at this point. The aliens placement is random and the distance numbers change and are correct. When the motion detector board output goes high the aliens start appearing on the screen and come towards the bottom center in 3 waves. I didnвЂ™t want to use a Raspberry Pi a because even a Pi zero is a little too large and takes too long to boot and is power hungry and it should be doable with a micro-controller (and it is). I did a simulation of the filter characteristics in LTSpice and ended up with a voltage divider of 18k and a 1k pot with 100nf cap for the RC filter.ДЁ) PAM8403 23db fixed gain amp board вЂ“ as is вЂ“ the preamp board does the conditioning of the signal and volume controlДЎ0) вЂњRADARвЂќ board вЂ“ this is not really radar вЂ“ it is more just an RF motion detector that operates at just above 3ghz. For some reason the makers of these tft boards like to lay them out in the worst way possible from a wasted space standpoint.Дў) This is my go-to micro-controller board, small, cheap, quad flat pack with all pins accessible.ДЈ) 5v rail Bulk storage capacitor - the boost converter is tiny and needs some bulk storage on the 5v rail.Д¤) 5v boost converter вЂ“ made for drones вЂ“ not the cheapest but very small and they work.ДҐ) Standard 4056 based LiPo charger and protection board вЂ“ modded with a 5.6k resistor in position R3 to limit the charge current to 210maД¦) Drone lipo battery вЂ“ made for high charge and discharge currents, but I donвЂ™t push them that hard and keep the charge/discharge current under 1CД§) вЂњpreampвЂќ board вЂ“ the audio amp board input is +/- 300mv and this board brings the 5v square waves coming out of the micro-controller down to max 300mv or less and also acts as a low pass filter to knock the rising edge and harmonics off the square waves and make them look more like sine waves. audio attenuation/volume control/low pass filterДЎ) I chose this particular TFT because the layout was just right and by cutting about a centimeter off of one side of the board you can get a centered tft panel without too much wasted space on the sides.