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+--- Thread: 1-wire pullup resistor (/showthread.php?tid=2268)
1-wire pullup resistor - Bitver - 08.10.2019
Hi,
Do I need a pullup resistor for 1-wire temperature sensors ds18b20 connected to Re:actor?
RE: 1-wire pullup resistor - admin - 08.10.2019
Are you powering it from 5V or using parasitic power? From datasheet: VDD must be grounded for operation in parasite power mode.
RE: 1-wire pullup resistor - Bitver - 08.10.2019
(08.10.2019, 11:07)admin Wrote: Are you powering it from 5V or using parasitic power? From datasheet: VDD must be grounded for operation in parasite power mode.3 wires: +5v, GND, Data.
RE: 1-wire pullup resistor - admin - 08.10.2019
Pull-up is not needed but you can get more reliable readings by adding a capacitor (at least 0.1uF) between +5V and GND as close as possible to the sensor.
RE: 1-wire pullup resistor - Bitver - 10.10.2019
(08.10.2019, 12:05)admin Wrote: Pull-up is not needed but you can get more reliable readings by adding a capacitor (at least 0.1uF) between +5V and GND as close as possible to the sensor.
Thank you.