Search results

I'm making a small 12V DC powered aerial rotator. The mechanical part drives a potentiometer through 280 degrees (of its 300 degrees possible travel) as itself rotates 0-360 degrees. The 10 degrees 'spare' at each end of the potentiometer is to save it from end-stop damage in the event of minor...

Due to an error by the buyer I supply, I have a surplus of handy little PCBs designed to take a 14M2 as either a 'stand alone' or mix with motherboards. It will also accept an 08M2 and give a bit of prototyping space. Its designed with download socket, the two download resistors, a wally diode...

Here's an interesting project.... After seeing the MPH (dual 7 segment) display in my Mazda RX8 dashboard my son (who is building a Haynes Roadster, a 'Caterham 7' style car) has decided he would like the same sort of thing in his so is planning a digital dashboard. So my initial thoughts are...

The code below simulates fine, a simple AA cell tester. Startup lights all the LEDs and then lops 15 times showing the voltage read across the cell, then drops into a 'cell-loading' loop where a Mosfet and small value resistor load the cell. It continues displaying the cell voltage As stated...

I'm wondering if anyone has successfully got any Picaxe to read 3 or 4 servo control signals from a R/C receiver. A search reveals that they will need reading in sequence, that's OK, its does not have to be that fast as its not for a plane or car project, just some motor control on a project - 1...

This is the situation: I'm putting a different (non-original) engine into a Mazda RX8 which has (had) a rotary engine. Understandably the rotary engine does not have a conventional ignition trigger wheel (such as the 36-1 Ford device), but it does have the commonly used VR sensor. Its not a...

Its a simple project to illustrate outputting a binary word derived from a pot on the input ADC C.1. The ADC word is used to control 2 CMOS 4511 BCD to 7 segment drivers. But it just counts up disregarding the value of B0!! Even after ignoring it for the weekend I still can't see WHY it outputs...

I note that in the latest on-line manual, (p.113+114 Manual 2) the 33OR resistor that used to exist in the positive feed to the Sensor has been removed. Before I change my PCB, could Technical comment on any effect this may have - or not, I guess!! ?? Thanks....

In an attempt to increase the range by upping the pulse current to the IR LED (whilst keeping the hardware to a minimum) is there any way of simultaneously sending IROUT to TWO pins on a PICAXE 08M2? Basically I'm intending to read ADC from a controller mounted potentiometer (C.4), then when a...

This works fine...... init: dirs=%00010111 symbol RED_LED=c.0 symbol GREEN_LED=c.1 symbol speaker=c.2 symbol Movement_Sensor=c.3 main: if pinc.3=1 then goto alarm high RED_LED Pause 50 Low Red_LED Pause 950 goto main But if I replace the first line of main with: "If...

I have been wondering if a Picaxe could replace something like a PT4115 LED driver chip by essentially doing the same thing. http://www.micro-bridge.com/data/CRpowtech/PT4115E.pdf shows the chip in question which I have found in a lot of '12 volt' LED drivers. They work really well too, apart...

As above, if I enable the internal pull-up resistor on an 08M2 pin C.4, then connect an LDR from C.4 to ground and use the readadc c.4,b0 command, can I save myself a resistor? Clearly perhaps not the ideal value to use (100K-ish for the internal pull-ups AFAIK) but adequate for basic light...

A quick search did not yield any posts, so I thought I'd offer this. One of my pupils is making a cricket light monitor for which he will use an LDR, not least because its response reasonably matches that of the human eye. He then wondered about monitoring UV levels (sunburn etc) and spent a...

I have a 14M2 running 8 LEDs on ports b.0-5 and C.0,C.1. ADC c.4 fed with a potentiometer. I have all three PWM channels doing what I want, ie dimming the LEDs and I'm trying to get the best control/dimming capability out of the other 5 channels. My understanding is that the PWM command uses...

Those of you with any Android based phone or tablet will probably be familiar with the rotary icon showing that there is a process underway (downloads etc). Its not easy to describe, but is basically two running 'lights' one going clockwise and one going anticlockwise with a fading trail. I...

I bought one of these back in 2003. It does not compile certain PICAXE codes (Readtemp is a known example) for reasons of code confidentiality. I'm OK with that but I'm wondering if there is an upgrade available to reflect the newer/more modern codes, specifically IRout which I want to use...

Just browsing this command and I noticed that the 330R resistor that used to appear in the +ve supply to the IR module has been deleted. It was there when I designed the PCB last summer. Can anyone 'officially' confirm its OK to run without (data sheet on IR RX does not show it) before I commit...

Very simple circuit, 3 servos on an 08M2, Pins 0,1&2. I want them to move slowly in both directions in a sort of anti-phase - the middle servo drives in the opposite direction to the left and right ones. What I'd like is for all 3 servos to go at the same speed in EACH direction, but with 3 on...

This is some snooker scoreboard code that simulates fine. However, in hardware the b0 register will not count up past 1, UNLESS the buttion is held down. The similar colour count section works fine using b1. What are we missing?? - both teacher and pupil are involved here!! Thanks Gareth...

Just chucking this idea out to see what people think..... Hardware: 14M2 with potentiometer feed to C4 ADC and digital input on C3, a push to make with pullup enabled. 8 LEDs driven from b0 to b5, plus C0 and C1. Software: Power up, LEDs reflect BINARY value set on potentiometer (0-255) Press...