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istatrol [2016/03/25 16:41] – [RADIATOR_RESPONSE_TIME] Traumflug | istatrol [2016/03/26 15:21] – [Bugs] Traumflug | ||
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- | For the technical: ATtinys feature no Analog Digital Converter (ADC). But there is [[https:// | + | For the technical: ATtinys feature no Analog Digital Converter (ADC). But there is [[https:// |
As one can see by the coarse measurements done, this is linear enough for our purposes. The recorded pretty hefty hysteresis isn't a property of the thermistor or the ISTAtrol, it's an artefact of the measurement procedure. | As one can see by the coarse measurements done, this is linear enough for our purposes. The recorded pretty hefty hysteresis isn't a property of the thermistor or the ISTAtrol, it's an artefact of the measurement procedure. | ||
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* Replacing the ATtiny2313 with an ATtiny4313. Program memory is so constrained that this is considered to be a bug. | * Replacing the ATtiny2313 with an ATtiny4313. Program memory is so constrained that this is considered to be a bug. | ||
* C3, 1.0 uF, should have a 200\_mil wide footprint. Many suppliers don't have 100\_mil types at this capacity. | * C3, 1.0 uF, should have a 200\_mil wide footprint. Many suppliers don't have 100\_mil types at this capacity. | ||
- | * Key //Menu// should go to INT1 to allow triggering an interrupt. Crucial for allowing the MCU to sleep. | + | * Key //Menu// should go to INT1 to allow triggering an interrupt. Crucial for allowing the MCU to go to sleep. |
* These three thermistor connectors actually don't work this way. Connecting to means that current flows partially not to the measuring capacitor, but to the other ATtiny pin. Can likely solved with diodes, but note that a capacitor fills reasonably linear in the lower 20%, only. | * These three thermistor connectors actually don't work this way. Connecting to means that current flows partially not to the measuring capacitor, but to the other ATtiny pin. Can likely solved with diodes, but note that a capacitor fills reasonably linear in the lower 20%, only. | ||
istatrol.txt · Last modified: 2018/05/27 16:10 (external edit)