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This query has possibly been covered before but I couldn't find any results covering or near my particular need when I did a forum search. Is it possible to 'trickle' charge a 3.6v NiMH 80mAH battery (small PCB solder-in unit) from an external 5V supply using only a resistor (to convert to...

Am in the process of designing a circuit using a 28X1 chip with a 16Mhz resonator - with a main power supply of +5V and a backup battery supply of +4.8V (which could go down to as low as +4V before being recharged.). My query is - will a 28X1 chip using 16Mhz clock run reliably down at +4V to...

As the title says - what commands will be affected if I run my 28X1 on 16Mhz resonator.? I've had a read of the Picaxe manuals - but am still unsure as to actual commands that will be effected AND what the effect will be.? For example - can I still use i2cwrite / i2cread commands correctly at...

Am still having difficulties in understanding the relevant 'code' steps to get "interrupts" working on both the 28X1 chip and 14M chip.. What I'm trying to workout is how to setup for 'interrupts' on a 14M chip with 8x 'digital' i/p lines that can output an 'interrupt' to the 28X1 chip when any...

. OK - this topic may be done to death already..:D Am located in Australia - so when designing my project PCB's - I elected to use the 'free' ExpressPCB software to lay out my boards..:eek: I could have also used the EAGLE PCB package to do it - but didn't - too much of learning curve..:(...

. As referred to at this site - http://world-educational-services.ne...1&keyword=28X1 .. Would there be any PICAXE'ers here in Australia interested in purchasing one or two (or more) of these "USB 28X1" module boards..? Went onto 'World Education Services' website above and found that the...

Any development towards "STAMP" sized modules for Picaxe chips similar to the "Arduino" style (see here: http://www.arduino.cc/en/Main/ArduinoBoardMini ) - using surface mount components..? Would definitely ease the use of smd Picaxe chips and also allow for 'smaller' packaging of usefull and...

Hi, 3 x questions: 1. Is the 'basic' (.bas) prog used in the Picaxe Datalogger (AXE110) availabe as a separate .bas file.? 2. Is the Datalogger "mission data download" (.bas) file also available as a separate .bas file.? The reason is that I'm in the process of designing a small 'datalogger'...

Hi, Compilers working successfully under Puppy Linux v2.15CE (kernel v2.6.18.1) xterm (terminal) & geany (text editor).. Machine setup: ASROCK VIA 'all-in-one' m/b; AMD Duron 1.8Ghz+; 1.0GB RAM; 20GB hdd (Win98se); 80GB hdd (MEPIS 3.4-3/Puppy v2.15CE Frugal); 1GB USB pendrive (Puppy 2.15CE...

What i/o pins on the 28X1 chip support 'interrupts'..? Looked at the Manual - could not find where this is referenced..! Also - if I run the 28X1 using a 16Mhz crystal - what would be the MIPS throughput..? In my project I need at least 5 x inputs with 3 supporting 'interrupt on falling edge'...

Hi group, Q1: Using an 08M @ 8MHz - for pwm, what is the timer 'reference' period - 2.5uS or 5uS ? If I needed a pwm out @ 1200Hz, 50% mark/space - how would one code the "PWMOUT" command for this? Q2: Is it possible in Picaxe BASIC code or by inserted Assembly code to set an...

Meant to ask in previous post if anyone has developed any code to do 'manchester encoding / decoding' using a Picaxe - if so where can one find it (if it has been posted to the web of course) ? Am looking at using 08M's as an encoder & decoder for a comms link.

Hi group. With regard to the pulsout command - has anyone done any 'time' measurements on how long it takes for a pulsout command to be performed in say an 08M picaxe. For example: An 08M running at 8Mhz - ----------------------------------- MainLoop: w0 = 5 PULSOUT txpin,w0 ' Pulse 1 PULSOUT...

Re: Battery life for remote sensor circuit - extra info Hi Jeremy Leach - You might want to consider instead to actually switch off the battery power to the Picaxe and sensor circuits UNTIL you need to take the measurements THEN turn the power on via a low Rds-on N-Channel FET. I'm using a...

Hi All, I am aware that this topic has been hashed to pieces already but I would like someone else's opinion, comments or suggestions please!! I did a 'search' within the Picaxe forum archives on - Battery Chargers - and found several very interesting threads. I was pleased at the depth of...

I am aware that the PIC uprocessor chips that the various Picaxe chips use as their basis are available in SMD packages, so is there any moves for the near future from Rev-Ed for us 'humble' picaxe-phytes to see our favourite beasties come out in suitable SMD packages for those of us who would...