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I am aiming to run a cdrom stepper motor and have downloaded some code written for a picaxe 28 and a L293d driver. The program is "designed to wait until it detects a serial input on input 0 (pin 17) in the form of three bytes: The first is a qualifier – 85 uniquely identifies this stepper motor...

Hi, I want to use the CD/DVD loader mechanism from a CD drive unit from an old PC. I've dismantled it and its activated by a 5v dc motor ( not stepper). So its easy to get it to open/close by reversing polarity. But as far as I can make out there's no limit switches or sensors in the...

I'm making some simple mistake but can't figure it out. I've set up the IR receiver circuit as per Hippy's factsheet and it works fine with the TV remote- many thanks for that. Now I'm just trying to get the IR LED to work on another 08M by connecting it between Output 0 and 0V via a 220R...

I've just bought the PICAXE LCD firmaware chip and got it working with a non picaxe LCD. The data sheet that came with the PICAXE firmware suggests this code: serout 7,T2400,(254,1) pause 30 serout 7,T2400,(254,128,“Top Line”) serout 7,T2400,(254,192,“Bottom Line”) pause...

In Sec 3 Input device 1 there is a 1K resistor in series to Pin 0. On all the subsequent input devices in Sec 3 there is no 1k resistior. Why is thiis please? Is it that the 1k resistor is always assumed to be in place? Or is it only relevant to the mechanical switches in input device 1? many...

I am trying to copy word for word the sample procedure on page 17 of the PICAXE interfacing circuits manual - to control a bipolar stepper motor using L293D chip. I'm using an 08M PIC. When I check the syntax it comes up with an error for two lines line 8: goto step ( seems odd since it is a...

I'm wondering what is the maximum amp I can put through a ULN 2003 IC to drive a 12v stepper motor. I've successfully programmed it to drive a ex computer printer stepper but I want to do chunkier things. If its not more than 1 amp - is it still possible to use PICAXE to drive a larger...

I wantr to use two momentary switcehs to change a motor's direction. So as the motorised object reaches the switch it momentarily turns it on - changes direction reaches teh other switchm, momentarily turns it on, changes direction etc etc . Can any7one suggest a circuit /programming solution...