Uploaded August 2025 | Updated September 2026, 13 minutes ago
Measuring temperature with a PTC thermistor and an ADC …
↓↓↓ Complete description, time index and links below ↓↓↓
Last time we build our electromagnetic compliant (EMC) power supply, based on a switch mode regulator (link below). We still have an ADC input left, so let’s measure the temperature, because everything will be in an unventilated case.
First we look at the general options for temperature measurement, settling on a thermistor. After discussing NTC and PTC thermistors, we build our circuit around a TMP61 PTC and an ADC input. The result is good enough for our purposes.
00:00 Intro – temperature monitoring should things get hot
00:38 Options – digital sensor, thermocouple, thermistor
02:36 Thermistors – NTC vs linear, silicon based PTC
06:41 Texas Instruments TMP61 – 10kΩ ± 1 linear PTC
09:51 Circuit – voltage divider with PTC plus buffer capacitor
17:03 Breadboard – added a resistor, a PTC and a capacitor
17:55 Real values – of used resistor and PTC thermistor
18:53 Math – for PTC thermistors and voltage divider
22:14 Code – nothing we’ve not done already
26:36 Test – 5°C noise, error +3.5°C, good enough
28:48 Wrap-up – next we do some housekeeping, bye
Full Fly-by-Wire Electric Outboard youtube.com/playlist?list=PLwq-2MnM58FKvpYgFXgNCjlKo14L0KI16
Full Fly-by-Wire Electric Outboard (11): Power Supply Circuit (EMC Compliant) youtu.be/5_Q-G0tgG1o
Full Fly-by-Wire Electric Outboard (10): Water Intrusion Detection Circuit & Code youtu.be/7OSBXC-3OzY
Full Fly-by-Wire Electric Outboard (13): Housekeeping (1) youtu.be/Do33fDij2_o
Arduino, DS18B20/DS18S20 Temperature Sensor and 1-Wire Bus – The Details youtu.be/XUm9RPWRBx8
Arduino, DS18B20/DS18S20 Temperature Sensor and 1-Wire Bus – Addendum youtu.be/QXZOWEoRcFw
Arduino, Thermocouples, MAX6675 and SPI – The Fine Points youtu.be/qub3yzqEwek
Arduino, Thermocouples, MAX31855K (vs MAX6675) and SPI – The Fine Points youtu.be/1xHdYEeETiM
#flybywire #electricoutboard #haswing #trollingmotor #outboardmotor #outboard #robertssmorgasbord
Measuring temperature with a PTC thermistor and an ADC …
↓↓↓ Complete description, time index and links below ↓↓↓
Last time we build our electromagnetic compliant (EMC) power supply, based on a switch mode regulator (link below). We still have an ADC input left, so let’s measure the temperature, because everything will be in an unventilated case.
First we look at the general options for temperature measurement, settling on a thermistor. After discussing NTC and PTC thermistors, we build our circuit around a TMP61 PTC and an ADC input. The result is good enough for our purposes.
00:00 Intro – temperature monitoring should things get hot
00:38 Options – digital sensor, thermocouple, thermistor
02:36 Thermistors – NTC vs linear, silicon based PTC
06:41 Texas Instruments TMP61 – 10kΩ ± 1 linear PTC
09:51 Circuit – voltage divider with PTC plus buffer capacitor
17:03 Breadboard – added a resistor, a PTC and a capacitor
17:55 Real values – of used resistor and PTC thermistor
18:53 Math – for PTC thermistors and voltage divider
22:14 Code – nothing we’ve not done already
26:36 Test – 5°C noise, error +3.5°C, good enough
28:48 Wrap-up – next we do some housekeeping, bye
Full Fly-by-Wire Electric Outboard youtube.com/playlist?list=PLwq-2MnM58FKvpYgFXgNCjlKo14L0KI16
Full Fly-by-Wire Electric Outboard (11): Power Supply Circuit (EMC Compliant) youtu.be/5_Q-G0tgG1o
Full Fly-by-Wire Electric Outboard (10): Water Intrusion Detection Circuit & Code youtu.be/7OSBXC-3OzY
Full Fly-by-Wire Electric Outboard (13): Housekeeping (1) youtu.be/Do33fDij2_o
Arduino, DS18B20/DS18S20 Temperature Sensor and 1-Wire Bus – The Details youtu.be/XUm9RPWRBx8
Arduino, DS18B20/DS18S20 Temperature Sensor and 1-Wire Bus – Addendum youtu.be/QXZOWEoRcFw
Arduino, Thermocouples, MAX6675 and SPI – The Fine Points youtu.be/qub3yzqEwek
Arduino, Thermocouples, MAX31855K (vs MAX6675) and SPI – The Fine Points youtu.be/1xHdYEeETiM
#flybywire #electricoutboard #haswing #trollingmotor #outboardmotor #outboard #robertssmorgasbord
