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Ok thenks for the response and also the links to related projects which look interesting.

Thanks for all this additional info. I am still processing and testing your character drawing example. In fact font doubling is not really required so the initial idea is to replace the existing lookup or table based font bitmaps and select case loop for mapping ascii characters to bitmap...

Thank you for this very informative response. Hi2cout seems very quick even on the 08m2 so that a graphic bitmap covering the full screen area and hardcoded across 5 hi2cout statements appears instantaneously whereas even two rows of characters are visibly written. It does not really matter for...

Very Interesting. The picaxe with the SSD1306 displays are certainly a great combination and can be driven by even the humble 08m2 or with the 14m2. The 14m2 being the ideal chip with its 512 byte table for the character bitmaps and 2 slots which allows the oled driver to sit in slot 1 and do...

Thanks. Lots of information to digest here. The reason for the coin cell was simplicity. For a longer term monitoring solution the voltage regulator would be better and give a more accurate result and the drain will be minimal compared to the several hundred ampere hour capacity of the...

Thank you for this code. This should prove very helpful in getting the application up and running.

Thank you for this information which is very helpful. With regard to the capacitor on the lower resistor what sort of value is recommended? Thank you also for the explanation of why the small white rectangular capacitor on the input supply is needed which also explains why an adc pin shows...

Thanks for this helpful input. Can you point me at one of your other posts as I have tried searching the forum and do not find any concise data on what resistor values would be appropriate but somewhere I have seen that this should not exceed 100k ohms in total. Driving of the supply being...

The requirement is to monitor the state of two 12 volt lead-acid batteries which are attached to a theoretically 'intelligent' regulator which charges the primary battery as a priority but also attempts to maintain the secondary battery in condition. It seems that this has not been happening...

Hello All, It would seem to be a simple matter to use a voltage divider and ADC pin to measure voltage but the forum and the internet seems to be awash with complicated solutions and discussions on unexpected ADC values. Picaxes also seem to be quite sensitive to the resistor values on their...

Deathly silence. Unfortunately a lot of tried and trusted software no longer works with the latest version of Mac OS and this is about to get a whole lot worse as they are soon to ditch Intel processors. VS Code can be easily made to work in place of Macaxepad (the downloads on the Picaxe site...

Have now tried removing the sertxd and everything works exactly as expected. Thank you for this useful tip which is also a valuable piece of knowledge for any future projects.

Thank you for your helpful input. Unfortunately I cannot access the computer and code right now and have reverted to BillBWann's original code except as described in my longer post. His solution is now doing a real life field test due to an unexpected failure of a float switch since my initial...

Yes sertxd is there to report the value from readadc. I thought it was coming from resetting the pullup but sertxd is the most likely cause and this can be easily tested. Otherwise the code functions well as is and is already at work as a stand-in for a float switch which cannot be obtained...

The reason for using thicker wires was based on the Arduino variant of the project where it was noted that thin wires did not work very well as the sensing electrodes were about 1.5 metres away from the Arduino board since they had to run through a specific path using a pre-existing cable track...

Thank you for these helpful suggestions. In fact with the help of the forum members the solution seems to be essentially found. Not sure how to post a round of beers to all the forum members who have helped on this but I now have a very happy consignment of picaxe 08m2's which can be put to work.

With the Arduino it is definitely necessary to average several readings but with the picaxe a single reading gives a quite stable result. Your original code used readadc which I changed to readadc10 with word variables but readadc gives sufficient precision. I note your observations on the...

Yes this works well and is as simple as I expected it to be. Many thanks for this suggested solution. On the Arduino version the program takes about 10 samples over 200 milliseconds and averages them to get a more stable reading. On the picaxe 08m2 this technique produces a very different ADC...

The Arduino circuit was a jury-rig repair to replace a commercial ultrasonic switch. But the Arduino system works so well that it has become permanent. But it seems a shame to have a full sized Arduino or even a micro sized board tied up when all that is needed is one adc pin on a 8pin chip...

Thank you for this idea. It seems bizarre that something that works well on the Arduino (both Samd and 328) would not work on a picaxe although perhaps the electrical characteristics of the chip are different. I have tried a range of resistors from 100k to 10M with no success. Allycat has...