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Hi, I'm trying to make a (relatively) simple dual pump controller which essentially has two water sensors and two pumps each pumping water from different areas. I want each pump to start independently only after its sensor has gone high (sensed water) for at least a second, and continue...

Hello ever helpful experts. I'm totally baffled by what should be a really simple circuit/software using a centre-off toggle switch to select up in one direction and down in the other. Basically, the 'Down' direction of the switch works fine but not the 'Up', using the serial-in pin, C.5. This...

I'm playing with a little project to open a door under manual or timed control using an 08M2 for the main control and an AXE133 board with a simple 2 x 16 LCD to show what's happening. The 08M2 doesn't have quite enough I/Os by the time I've used two (SCL & SDA) for the RTC, one for the serial...

This project aims to display a message of about 18 (or more if required) alphanumeric characters on four 8x8 LED matrix displays (i.e. 32x8 pixels) using pixel by pixel (column by column) scrolling. The hardware in use is (four off) the FC-16 board & display shown in the attached pictures...

Firstly, apologies if there is already an answer to this query somewhere in this wonderful set of forums, but if there is I haven't been able to find it. What I'm trying to do is display a message of about 18 characters on four 8x8 LED matrix displays (i.e. 32x8 pixels) using pixel by pixel...

I'm doing a moderately complex RF receiver with LCD o/p and have run out of variables to work with. I'm currently using eight bytes for receiving the incoming data: SYMBOL rx_byte_0 = b8 ; SYMBOL rx_byte_1 = b9 ; SYMBOL rx_byte_2 = b10 ; SYMBOL rx_byte_3 = b11 ; SYMBOL...

While playing with the highly recommended DS3231 RTC board (a sample of which costing all of 82p inc P&P has just arrived from China), I was finding it messy to work out which bits in the various control registers were set (or not set) when reading the registers and outputting via SERTXD...

I have a circuit which generates 600µs negative pulses which I want to count with interrupts (incrementing dcl_in), because I don't want to miss any pulses while other things might be happening. Being unfamiliar with PicAxe interrupts I followed the example in the manual and generated this...

Thanks to and others for help on this, I thought it might be useful to others if I posted the circuit diagram for the AXE901 board having reverse engineered it (a bit OTT, sorry) to assist with programming. It's a really useful little board for experimenting with and getting to know the PICAXE...

While buying some other stuff from the PICAXE store I got a few of these 'badges' at the bargain price they're currently going for, but I can't find any information on them anywhere in any of the PicAxe forums, or other websites. Does anyone have any details on them please? It doesn't look as...

Experimenting recently with one of the little (approx. 1"/26mm sq.) DS1307 Real Time Clock (RTC) boards with EEPROM (AT24C32, 4096 bytes), I needed a bit more detail as the majority of sellers on a well known auction site don't seem to offer much if any detail. Even where there is more detail...

Hi, I'm experimenting with logging data to the AT24C32 on a cheap DS1307 RTC board (controlled by an 08M2+) and having discovered lots of useful threads already (especially in the code snippets forum, thanks to all for those), it looks straightforward to do what I want. In particular, I...

I note there are plenty of useful and interesting suggestions in other threads such as "Current-measurement-How-would-you-do-this" but not much of what's referred to there is particularly appropriate to what I'd like to do. Basically, I've got two banks of 6 x 12V 110Ah batteries i.e. two 72V...

Further to the very helpful discussion in my previous thread "Interrupt advice please?", I've been trying to get some lower speed measurements as well as the (apparently) accurate measurements I'm getting which range from about 23 rpm to 999 rpm. I've been using PULSIN with the standard 4 MHz...

I've been trying, with only partial success, to understand the M2 series devices' memory maps, and in particular exactly where various commands such as "TABLE" and "WRITE" actually write their data, so that I don't risk over-writing things. I've looked at various threads on this forum (14M2...

I have a simple circuit monitoring four magnets on a pulley wheel to measure the speed and direction of the shaft it's attached to. The circuit diagram above shows how it works, the two Hall Effect sensors being mounted close together so that as a magnet passes them, it activates first one and...

I hope this is trivial, but I've been trying for a whole day now to discover why something's not happening and have tracked it down eventually to a bit variable getting set when I'm not expecting it to. The much abbreviated code is: IF fwd_thrtl = 1 THEN ; the throttle has been moved into the...

I've searched the forum (in excess of 500 hits for ADC*) and can't find an obvious answer to my problem which is that I'm getting some very strange results (consistently low) when reading the ADC value from a buffered potentiometer: The code is as simple as I can make it to just test what...

I'm getting back into PicAxe programming having been away from it for over a year (so having to relearn much stuff again). Working now on a throttle controller for our boat, I want to occasionally (every two or three seconds) send a variable representing the percentage of maximum throttle...

Just trying various techniques I haven't used before including using the EEPROM in a 20M2 for logging data, I wanted to output the stored data by RF link when a button's pushed to generate an interrrupt (circuit attached). I tried SLEEP 1565 to power the PicAxe down for an hour or so between...