How to build a miniature remote controled spybot

How to build a miniature remote controled spybot

By 4rm4g3dd0n | 18036 Reads |

0     0

Built using parts from an old remote toy and some audio/video electronic electronics. This Remote Operated Vehicle caries a sensitive microphone and preamp, a video camera and infrared LED's witch allows it to be operated in total darkness. The first thing we need is a remote controlled toy vehicle with a sturdy base preferably 4x4

Welding the sides and top of the ROV cover http://s3.supload.com/thumbs/default/image1-20081207154036.jpg

Drill holes in the steel where the original screws were mounted to the original plastic toy body for easy access incase you need to add modify or repair anything if you wish.

We will be using three steel panels for the camera head http://s3.supload.com/thumbs/default/Image3-20081207161534.jpg

The head should be made with just enough room to mont a CCD camera and 24 LED's, and the servo motor to pan the head from left to right.

welded camera head mounting block and servo http://s3.supload.com/thumbs/default/Image4-20081207162327.jpg

The servo will be inside the camera head, with its output shaft protruding from a hole cut in the bottom plate. The hole in the camera head conforms to the output side of the servo motor held securely in place in the camera head. The output shaft from the servo and the whole cut in the camera head will be facing the ground to protect the camera from moisture. With a piece of rubber cut from a bicycle inner tube as a gasket To Connect the camera head to the mounting block the plastic servo arm will be cut to conform to the inside of the mounting block the bolted to the servo output shaft. Position so the head and servo arm are positioned center too the output shaft

http://s3.supload.com/thumbs/default/image5-20081207163235.jpg

When the mounting block and camera head are working together weld the mounting block to the cover. http://s3.supload.com/thumbs/default/image6-20081207164538.jpg

Completed cover and camera head http://s3.supload.com/thumbs/default/Image7-20081207164914.jpg

To mount the infrared LED's to the camera head some type of panel will be needed. Cut a small piece of sheet metal to conform to the open end of the camera head. add a small bracket to secure it in place with a single bolt. Place a small rubber gasket between the panel and camera head ( to keep electronic parts dry) Drill 25 holes 1 for the camera and 24 for the LED's http://s3.supload.com/thumbs/default/Image8.jpg

Mount the camera and LED's into the holes, use a glue gun to seal around the edges http://s3.supload.com/thumbs/default/Image9-20081207170235.jpg schematic: http://s3.supload.com/thumbs/default/Image10-20081207170506.jpg

image of the head complete http://s3.supload.com/thumbs/default/Image11-20081207170717.jpg

–AC RECEIVER TO SERVO BRIDGE CIRCUIT– http://s3.supload.com/thumbs/default/Image22.jpg

A micro controller running a basic program will monitor the functions of the existing remote control receiver. (existing forward, reverse, left and right). Check the voltage at the output wires to the drive and steering motor's to let the micro controller know what state the receiver is currently in. 8 possible states 1.Forward Straight 2.Forward Left 3.Forward Right 4.Reverse 5.Reverse Left 6.Reverse Right 7.Left Neutral 8.Right Neutral

The servo bridge is based on a PICI6f628 microcontroller running a simple program coded in PicBasic solder a wire from each terminal on both motors and connect all four wires to the microcontroller through 10k resistors to limit the current. the program monitors high or low levels at the input pins and responds with the appropriate pulse width modulated signal to the servo

– Servo Bridge Control Pogram (PicBasic)–

;[16F62A] @ Device HS_OSC @ Device WDT_OFF @ Device PWRT_OFF @ Device BOD_OFF @Device MCLR_OFF CMCON = 7 VRCON = 0

;[SETUP]

define osc 10 output porta.2 input portb.0 input portb.1 input portb.2 input portb.3 input portb.4

;[VARIABLES]

servo var porta.2 rcl var protb.0 rcr var protb.1 rcf var portb.2 rcb var portb.3 pos var word

;[STARTUP]

gosub center

;[MAIN LOOP]

main:

;[CENTER SERVO IF MOVING]

if rcf = 1 or rcb = 1 then gosub center

;[LOOK FOR NEUTRAL]

if rcf = 0 and rcb = 0 then

;[SERVO RIGHT]

if rcr = 1 then gosub right

end if

;[SET SERVO POSITION]

servo - 1 Pauseus 1000 + pos servo = 0 Pause 16

goto main

;[SUBROUTINES]

;[ROTATE SERVO LEFT] left: If pos < 1000 Then pos = pos + 10 Endif Return

;[ROTATE SERVO RIGHT] right: If pos > 0 Then pos = pos - 10 Endif Return

;[Center Servo] center: pos = 500 Return

;[PAYLOAD DROP CHECK]

if rcl = 1 then ctp = ctp + 1 if rcl = 0 then ctp = 0 if ctp = 500 then relay = 1 pause 1000 relay = 0 endif endif

– The Audio Preamp- -

A simple multimedia electret microphone fed into a high gain op amp http://s3.supload.com/thumbs/default/Image24.jpg

this can be soldered together with no board at all very simple mount it as far away from the motor as possibe to avoid picking up motor sound you can make the anteanna with a simple bicycle tire spoke. It is also cool to mount a flashlight to the top of the vehicle for better distance in video :)

http://s3.supload.com/thumbs/default/Image26.jpg

– The Base Station –

For a small LCD monitor and all the reciever electronics you need about 8 D-cell batteries a solid metal briefcase a pice of sheet metal ( which you have to cut out for your parts toggle switches

parts http://s3.supload.com/thumbs/default/Image28-20081207182249.jpg

assembled http://s3.supload.com/thumbs/default/Image29.jpg

The antenna wire is fed through the steel dashboard using a rubber grommet the remote control joy sticks are mounted through two small square holes, the remote is bolted on either side with two self tapping screws the middle is cut out for a miniature VCR wich is connected to a switch to remove it from the power suplply if not needed (usses POWER) the LCD video screen is mounted through a square opening also connected to its own power switch, and external audio jack for headphone use.

– Image of our new toy in use – http://s3.supload.com/thumbs/default/Image33-20081207183508.jpg

Now this is a fun project cant remember back when i learned it but it was fun and you can watch listen and record as you see fit. If you do anything illegal (.. drive it into the girls locker room and record etc…) It is not my fault Knowledge is free what you do with it is all on you :)

P.S as for the replies to this specific line it is not for perverts i was just using an example of something that would be illegal. there are more uses and also things that you could add for example: one extra thing i did with mine was add an extra LCD screen mounted on the head" made the head bigger" and snk it back used inner tube for a gasket and cocered it with a piece of plastic glass etc…" and with modifications to the box and the use of an old webcam" and another microphone drove it down the street to my sisters house and talked to her she could see me i could see her she could hear me and i could hear her there's always things you could add and things you can do that are not described