Maxi-Switch
Home
DIYRC STORE
About DIYRC.COM
What's New?
R/C Switches
Servo Projects
Tx/Rx Projects
LED Projects
Battery Projects
PCB Projects
Wireless Video
PIC Projects
Other R/C Projects
SOFTWARE
Favorite Links
Forums/Chat...
Photo & Videos
Customers
LIVE WEBCAM
Contact Us

03/30/2012
Earthmen Productions
Earthmen Productions
Dec-00-Mar-12

 

 

 

 

 

Home | Up | Aiptek 1.3M Switch | AipAxe R/C Switch | AipAxe Installation | Aiptek-SD Switch | Maxi-Switch | Simple-Timer
Updated: March 30, 2012

PIC Projects: "MAXI-SWITCH"
A High-Current, R/C-controlled Electronic Switch

History

Parts

Building

Programming

Testing & Operation

Notes

Note: All pictures that follow are "clickable"
The Maxi-Switch is a R/C-controlled, high-current controlling switch (via FET) that can be built using almost any type of n-channel FET, controlling loads over 50+ amps!

Assembly Instructions               User's Manual-Download or View            BUY ONE NOW!

A lil' history ...   UNDER CONSTRUCTION!
This project, called "Maxi-Switch", is a miniature programmable R/C-controlled, high current Solid-State (all electronic) switch that is based around the PIC microcontroller and an n-channel Field Effect Transistor (FET).  Basically, the circuit works by the PIC monitoring the R/C servo channel output signal (pulse widths) and when a certain servo signal position is measured, it triggers the gate on the FET, allowing the FET to control high current loads.

Before the circuit is first powered up (servo wire connected to R/C receiver), you need to be sure that your R/C transmitter is powered up and the controlling switch/stick/slider on the transmitter is in the proposed OFF position. When you then power up the circuit (if connected to an R/C receiver, the receiver is powered up), the PIC will first measure the current servo signal, assumed as the OFF position) and automatically calculates the ON position (usually, 60% of opposite stick/switch/slider position).  When you then move the stick/slider/stick past this 60% point, the FET should trigger, turning on your load.  To turn off your load, move the stick/slider/switch to the original OFF position.


As an example, here's a 50amps FET I've used
successfully:
http://www.williamson-labs.com/pdf/irfz44n.pdf

There are also some interesting FETs called HEXFETs (by IRF) that have very low on resistance with high current handling capabilities:
http://www.irf.com/product-info/hexfet/


(Under Construction... more coming soon...)


Design Criteria Summary:

1) Design a simply and cheap programmable R/C switch that can control large loads (20+ amps)
2) Make as compact as you can...
3) Make switch controllable using your Radio Control receiver (user can use switch or stick/slider to control the on/off behavior of electronic switch)
4) Design so user can use an external power source or for lower current application, use the servo supply power (via on-board jumper).
3) ....

 

       

     

 

 

WANT TO BUY A PRE-ASSEMBLED & TESTED MAXI-SWITCH?

Maxi-Switch
(Assembled & Tested)

CLICK HERE TO BUY ONE NOW !
LIMITED SUPPLY !

COMING SOON


 

Maxi-Switch  - Pre-Programmed PIC Only
(This is for one pre-programmed PIC only... no other parts)

CLICK HERE TO BUY ONE NOW !
LIMITED SUPPLY !

COMING SOON

 

Parts & Tools List ...

1) One (1) PIC 12F629 Chip (preprogrammed with Maxi-Switch hex code)
2) Two (2) 10K ohm resistors
3) One (1) 2.2K resistor
4) One (1) Servo Lead/Pigtail wire for Mini-Flash
5) One (1) FET/MOSFET (any 20-50 amp n-channel version should work OK)
6) One (1) 2-pin Header and jumper (to optionally use servo power to power FET)
7) Power wires for Supply and Load
 


Building Instructions...

* MINI-FLASH BUILDING INSTRUCTIONS *
CLICK HERE TO VIEW THE BUILDING INSTRUCTIONS FOR THE MINI-FLASH


COMING SOON....

 

Programming/PIC Hex Code...

SORRY, The Maxi-Switch PIC Hex Code can not be freely distributed...  sample code might be made available in the near future so check back here often...

 

Testing and Operation Instructions...

COMING SOON....

* MAXI-SWITCH USERS' MANUAL (PDF) *
CLICK HERE TO DOWNLOAD THE USERS' MANUAL FOR THE MAXI-SWITCH


 

MAXI-SWITCH  FAQ
 

Q1. I'm looking to build my own Maxi-Switch using your circuit.  Can you provide me the PIC code so I can burn my PIC?

A1. Sorry, the PIC code is not freely distributed as this is the only way I can recoup (monetarily) the time and effort I spent in developing not only the PIC code, but also the time spent designing the circuit, the printed circuit board and the time spent building and hosting this webpage.  I can though sell you a pre-programmed PIC for any of my projects.  Please be warned though that all pre-programmed PICs I sell are code-protected, in that you will not be able to read the Hex code using a PIC programmer.  Attempting to do so could damage the PIC and/or possibly erase the hex code.

Q2. How...

A2. By...
 

 

Additional Notes...
 
bullet

CUSTOMER PROJECTS, PICTURES AND VIDEOS!

Some Videos:
bullet

http://www.???

bullet

 

Some installation pictures:
bullet

http://www.???

bullet



 


   
**** VERY LIMITED QUANTITIES ARE AVAILABLE ****
Click Here to visit the

   
Earthmen Productions
Earthmen Productions
Dec-00-Mar-12

horizontal rule

Go to Top of Page
Go to R/C Switch Projects
Go to Main Menu

horizontal rule

 

        

 

Home | Aiptek 1.3M Switch | AipAxe R/C Switch | AipAxe Installation | Aiptek-SD Switch | Maxi-Switch | Simple-Timer

 

Home | DIYRC STORE | About DIYRC.COM | What's New? | R/C Switches | Servo Projects | Tx/Rx Projects | LED Projects | Battery Projects | PCB Projects | Wireless Video | PIC Projects | Other R/C Projects | SOFTWARE | Favorite Links | Forums/Chat... | Photo & Videos | Customers | LIVE WEBCAM | Contact Us