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    sealed lead acid battery tester

    thank you.... I did buy a commercial tester from Amazon which, as you say was only around £30 but it relies on the CCA (not the AH) of the battery for accurate test results...unfortunately no manufacturer will quote the CCA of a standard SLA battery as they arent realy designed to provide short...
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    sealed lead acid battery tester

    has anyone made a tester for SLA type lead acid batteries?.... the recommended method seems to be to pass a small ac current of around 1kHz through the battery to determine its internal resistance....
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    chip numbers

    great stuff....thanks for confirming
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    chip numbers

    I bought them from Rapid via their ebay outlet
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    chip numbers

    thanks for your prompt reply.... I purchased them as 18M2+ https://www.ebay.co.uk/itm/125432691082 .......... ......... https://www.rapidonline.com/picaxe-axe015m2-18m2-microcontroller-13-5026
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    chip numbers

    Is PIC16F1847 exactly the same as PIC18M2+? I ask as the ones I recently purchased (from a reputable UK supplier) are only marked 16F1847 with no reference to them being 18M2+ TIA
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    locks up laptop

    If you mean here (attached) then no, I wasnt so I have ticked the box now....
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    locks up laptop

    Thanks.....seems to be ok at the moment
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    locks up laptop

    thats a possibility I guess but that wouldnt surely be the case after it had all settled down....
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    locks up laptop

    Difficult to be sure as I dont use it on the laptop very often SSD is fine - loads of tests run and it is OK Have un-installed / re-installed several times Agree with the windows update possibility.... that does many weird and <not so> wonderful things......but this happened after update...
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    locks up laptop

    Thanks...my laptop is not a low spec machine - 64 bit i7 + SSD - and is fully clean and streamlined.... the fact that this problem is intermittent is all the more confusing
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    locks up laptop

    possibly related to this post ??? Can't "save" or "save as" | PICAXE Forum
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    Can't "save" or "save as"

    I have the latest editor program and the laptop (win 10 pro 64bit) is fully up to date I am using Bitdefender paid for version on PC and laptop Opening editor takes ages to load on the laptop and when saving a file also takes an age, usually with a “this program is not responding” message...
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    locks up laptop

    I have the latest editor program and the laptop (win 10 pro 64bit) is fully up to date Opening editor takes ages to load on the laptop and when saving a file also takes an age, usually with a “this program is not responding” message appearing…. If left it will eventually complete No such...
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    closed loop DC motor speed control

    havent got around to trying it yet :rolleyes:.....
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    closed loop DC motor speed control

    I dont know of any way of extracting a reference sync...
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    closed loop DC motor speed control

    The generator motor outputs about 6V at the required speed....yes the top shaft is the main projector shaft
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    closed loop DC motor speed control

    With the gearing I have, about 3000 RPM at the motor gives about 1000 at the shaft......11V @1.2A
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    closed loop DC motor speed control

    piclt : for reference I checked the motor current with absolutely no load and nothing connected to it and guess what....at 12V it was 400mA :) Maybe the spec got confused in translation.....anyway as previously stated it is quite a powerful motor
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    closed loop DC motor speed control

    Problem is I don't think there's any way of getting to the sync pses from the camera (camcorder) - a Sony FDR-AX53
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