Summary of NIXIE TUBE THERMOMETER CIRCUIT
This project describes a retro Nixie lamp thermometer using an ATtiny2313 microcontroller and a DS18B20 digital sensor. The system measures temperature with 12-bit resolution, filtering out values outside the +10°C to +44°C range to ensure accuracy. A specialized MC34063 inverter circuit generates the high voltage required for the Nixie lamps, controlled by a MOSFET transistor and associated passive components.
Parts used in the Nixie Lamp Thermometer:
- ATtiny2313 microcontroller
- DS18B20 temperature sensor
- MC34063 voltage suppressor inverter
- MOSFET T1 transistor
- L1 choke
- D1 diode
- C7 capacitor
- R3 gate-stop resistor
- Nixie lamps
- Internal RC oscillator (1 MHz)
Nixie lamp Thermometer DS18B20 Circuit with ATtiny2313 The first Nixie lamps appeared in the mid-twentieth century. For many years they have been used in a variety of apparatuses but have been supplanted by newer… Electronics Projects, Nixie Tube Thermometer Circuit “avr project, microcontroller projects, “
Nixie lamp Thermometer DS18B20 Circuit with ATtiny2313 The first Nixie lamps appeared in the mid-twentieth century. For many years they have been used in a variety of apparatuses but have been supplanted by newer VFD displays and LEDs. For decades, forgotten again, they returned to grace in retro electronics projects of hobbyists as well as a wider audience thanks to increasingly popular commercial projects. The digital sensor measures the temperature with a resolution of 12 bits and a frequency of 0.5 Hz (every 2 seconds). In order to eliminate possible sensor errors, a range of accepted temperatures has been introduced from + 10 ° C to + 44 ° C. All values outside the range are considered erroneous and are not considered.
NIXIE THERMOMETER CIRCUIT DIAGRAM
The Nixie thermometer schematic diagram is shown in Figure 1. The heart of the circuit is the ATtiny2313 microcontroller running on an internal RC oscillator with a frequency of 1 MHz. As a temperature sensor, the popular DS18B20 chip is used to measure from -55 to 125 ° C with a maximum resolution of 12 bits. The U1, together with the set of external components, stabilizes the 5 V voltage used to power the digital part of the thermometer.
Due to the high flash voltage of the lamp, the MC34063 voltage suppressor inverter was used. The MOSFET T1 transistor, along with the gate-stop resistor R3, acts as a key. During conduction of the transistor the L1 choke stores the energy in the form of a magnetic field, and the diode D1 is polarized by blocking the C7 capacitor before discharging.
Source: NIXIE TUBE THERMOMETER CIRCUIT
- What microcontroller is used as the heart of the circuit?
The ATtiny2313 microcontroller running on an internal RC oscillator with a frequency of 1 MHz. - How does the DS18B20 sensor measure temperature?
It measures temperature with a resolution of 12 bits and operates at a frequency of 0.5 Hz every 2 seconds. - What temperature range is considered valid for this project?
Accepted temperatures are introduced from +10 °C to +44 °C, with all other values considered erroneous. - Which component stabilizes the 5 V voltage for the digital part?
The U1 component together with a set of external components stabilizes the 5 V voltage. - Why was the MC34063 voltage suppressor inverter used?
It was used due to the high flash voltage required for the Nixie lamp. - How does the MOSFET T1 transistor function in the circuit?
Along with the gate-stop resistor R3, it acts as a key to control energy storage in the L1 choke. - What is the maximum operating range of the DS18B20 chip?
The chip can measure from -55 to 125 °C. - What happens when a measured value falls outside the accepted range?
Values outside the range are considered erroneous and are not displayed or processed.
