Recent content by JTepper

  1. J

    Connecting picaxe and DS1801 digital pot

    Hey guys, Ive been playing around with a DS1801 digital pot and picaxe 28x1,http://datasheets.maxim-ic.com/en/ds/DS1801.pdf , at the moment im just trying to get it to give some results on a multimeter, and i cant get anything. Heres what im trying, and as far as i can see should be working on...
  2. J

    Wierd pwming behavior

    ok i have a BIG mosfet (irf1405n) connected to physical pin 12 of the picaxe (28x1 with 16mhz external resonator) via a darlington driver used to swich the 20v for the mosfet to turn on, and i can easily turn the motor on and off using the high portc 1 and low portc 1 commmands, but i cannot get...
  3. J

    Switching on 30A relays

    Just thought id check a couple of things before i etch my first prototype board, can somone whos good with data sheets confirm that a uln2003 will turn on these relays http://www.ficrelay.com.hk/details/FRA8.pdf the 24v ones, and if 20v is enough on the gate of these...
  4. J

    Robot wars project

    Ok guys, A group of us from school are building a robot to compete in the australian robot wars competition, we are intending to win by raming the competition with two 2500w brushless motors in the 13.5kg weight category!!!!!!! At the moment my questions are these. 1 which picaxe chip runs the...
  5. J

    Project idea

    Ive been building an rc tank that uses a picaxe chip to convert the pulses from an rc reciever to pwm for the motors, turn the turret and flash some lights and stuff. Now that ive got this working ive began thinking about upgrading it. My proposal is to use my psp to controll it via the wlan...
  6. J

    Switching mosfets

    I have a irf1405 n mosfet which turns on a h-bridge, with the gate connected to the picaxe pin via a 1ko resistor and to ground via a 100k resistor, the drain is connected to 7v and the negate side of a uf4004 diode, and the source is connected to a h-bridge of mosfets and the positive side of...
  7. J

    Picaxe robot arm needs more speed, help please!!

    hi guys (and any girls), ive been working on a picaxe robot arm code, the problem i'm having is that the calculations required to workout the servo angles to move the arm to any particular possition take so long thst the servo movements are really jerky and smooth motion between 2 points is...
  8. J

    Help with programming editor

    im programming a 28x1 chip but i cant seem to get the brackets to work in my maths sections tit always says syntax error, any help appreciated
  9. J

    Help with motor controll

    Hi, first of all im new to this forum thing so be nice. I'm working on a radio controlll buggy project, where 2 motors are used for propulsion and steering in a one goes faster than the other type fassion. However at the mment i am only able to turn them on and off, as the 14m only has one pwm...
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