Comment on Attiny85 the right choice for 24h led timer?
elmicha@feddit.de 10 months ago
If it doesn’t matter if it’s a few seconds too late or too soon an ATtiny 85 is good. If you need more accuracy you probably need an additional RTC.
Comment on Attiny85 the right choice for 24h led timer?
elmicha@feddit.de 10 months ago
If it doesn’t matter if it’s a few seconds too late or too soon an ATtiny 85 is good. If you need more accuracy you probably need an additional RTC.
cmnybo@discuss.tchncs.de 10 months ago
You could also use a crystal for the ATtiny and get the same accuracy as the RTC. It should be accurate to about 20-30 seconds per month with a good crystal.
The internal oscillator only has an accuracy of around 1% after you calibrate it. It would be off by over 7 hours after a month. It’s also quite sensitive to voltage and temperature changes.