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I ordered some 4N35 Optoisolator/Photo/Optocouplers off ebay and they duly arrived although with no indent to let you know which is the right way round so you can find pin1. Anyway after some trial and error I came up with a circuit that sort of works, however I have some questions which I'd...

I've had an idea for creating a non dcc sound modual for a model railway that could be built for under £20 While watching a youtube video of various locos doing their thing, I thought it would be interesting to take some sound clips of the locos and play them in relation to the track voltage on...

Are there any obstacles or protocols that should be used when trying to Connect multiple picaxes to each other via serin/out commands For instance if I wanted to connect ten pics together via one wire (plus common earth return) and control them from one central circuit, would this be possible if...

I've found the problem, Its my inability to be able to read a component pin-out and then connect said component properly. What confused me was that even though the transistor was connected incorrectly it did actually sometimes work! My apology's to all for my stupidity and my thanks to all for...

OK point taken, Full diagram attached I will try adding a 1k resistor between c.2 and the tranistor

updated diagram

Please see attached diagram All pins have 10k resistors to earth omitted for clarity, likewise the programming circuit Two separate regulated power supplies, one for the axe and one for the servo Also the two 0v are connected, but I forgot to show this on the diagram

I've been working on a circuit to control a servo and a relay for what seems like months now and have got to the stage were the circuit and code has been refined and work 99% as I want it to When the circuit starts up for the first time c.3 is used to set the parameters of the servo movement...

I want to build around 15 small pcb circuits each with an 08m2 on board which will control an individual servo. I was thinking that it might make sense to have one power supply for all the picaxe circuits that is regulated and smoothed and another power supply feeding the servo's. The supply for...

Thanks Angie I confess to not understanding a lot of your code as you are obviously more advanced than I am when it comes to programming. I did notice the lack of servo and servopos commands and couldn't understand how you were controlling the servos But I'd be interested to know. I made my...

Hello all, its been a while since I was last on here but I've returned with a query regards getting a servo to move slowly. I'm trying to get a servo arm to move slowly between two points and then back again. It works up to a point in that the servo does move slowly but not throughout the whole...

Hi all I've built two small circuits that are connected together with a ribbon cable that provided V+ and V- between both boards from the same on board power supply. On the main board the axe is a 20x2, and on the secondary board the axe is an18m2 and they are connected together again via the...

I have just discovered the hard way that the 20x2 only supports the servo function on the B ports and NOT on the C ports :eek: However this particular piece of information seems to be lacking in any of the spec sheets for the 20x2. Or its very well hidden. It is possible that I have missed the...

I'm just going to start playing around with the touch function on an 18m2 but would like some advice/clarification around the touch pad. The data sheet states that a touch pad can be created using a 20mm copper shape on a pcb as long as the pad is isolated from the finger by 2mm of plastic. So...

Hi all, Using a servo for the first time I want to make the servo travel from one side to the other very slowley using the code below... symbol delay=30 start: servo 2,150 pause 1000 for b1 = 150 to 180 servopos 2,b1 pause delay next b1 pause 1000 for b1 =180 to 150 servopos 2,b1 pause...

Hey all, Not strictly picaxe but would be an excellent project for one http://www.wimp.com/turnon/ Rgds, Sid

I'm a bit confused around the pwm and hpwm commands and the 14m. The pin out and appendix for advance use shows PWM2 on pin C5. In my simplistic way I would assume that there should be a PWM0 and a PWM1 as well but this is not shown. The data says that....... "C5 can be used with the pwmout...

Hi all, I've made a few picaxe curcuits but my knowledge of electronics is a bit sketchy and I've come up against a problem while making a new picaxe circuit that involves a diode. As you will see in the attached diagram the axe is powering led1 via a 330r resistor, however led2 which is...

I want a laser cutter but I can't afford one, not even a cheap one from China via ebay, so I looked around youtube and watched a few diy laser cutters and thought that perhaps I could make the hard ware but how do you get a 2d drawing from the pc to control the cutter. Obviously some sort of...

With much help from this forum I have just completed a Picaxe circuit that will control up to 8 signals for a model railway and in the spirit of sharing, the link to this circuit is here http://www.stuartmoore-modelrailways.co.uk/multiple_signal_control_unit.htm Doubtless some will pick holes...