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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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TEMPERATURE MEASURING sa PHOTOCHEMISTRY TEMPERATURE CONTROL sa TEMPERATURE ACTIVATED ALARM sa TEMPERATURE ACTIVATED SWITCH sa THERMOSTAT x THERMOMETER xx MEASURING & MARKING xx WEATHER INSTRUMENT Sport clocks. A ceramic golf bag or golf ball can be converted into a table clock or thermometer by incorporating the appropriate mechanism. Painting is done with nonfiring stains. Ceramic plaques for decorative thermometers are painted with nonfiring stains. (1) Sun and moon thermometer. (2) Lighthouse thermometer. Experimenting with Motorola's 68HC11 true single-chip computer. Part 7. SBC (single-board computer) applications (continued). A look at MAG-11's input-capture feature and how to use it to make an accurate binary-display thermometer. Also details using interrupts to generate square waves and producing computer music. Build the intelligent thermometer. Part 1. A microprocessor and a programmed EPROM are used in this sophisticated circuit to measure and analyze changes in temperature. Est. cost: $179. Build the intelligent thermometer. Part 2. A flashing LED indicates the temperature range being sensed. Electronic circuit uses any silicon diode as the sensing device. Electronic thermometer powered by two 9-volt batteries displays the temperature on a sensitive milliammeter. Est. cost: $5. Simplified, accurate 0-100 degree Celsius temperature measurement circuit is connected to a digital voltmeter. Electronic thermometer displays a temperature range of 40 degrees Fahrenheit on a 16-LED bar-type display. Est. cost: $18 (kit). Build an accurate 3.5-digit handheld solid state thermometer from a kit or scratch. Uses a liquid-crystal display and is theoretically capable of measuring from -200 to +200 degrees Celsius, depending on the probe. Est. cost: $30 (kit). Hands-on fishing guide device measures water temperature and helps locate the thermocline region where specific species prefer to gather. Eight-channel analog-to-digital converter. Breadboard project uses eight phone jacks to attach the temperature-sensing probes described in this article. Electronic thermometer measures air temperature and warns of ice-forming conditions. An electronic thermometer, the Thermistor, is battery powered and uses a microammeter to read out the temperature. Est. cost: $3-$5. Low-cost electronic medical thermometer measures 96 to 106 degrees. Denotes a person's highest temperature within one minute after inserting probe into mouth. Build your own temperature-humidity meter. Solid-state thermometer. Build an accurate, 3.5-digit handheld thermometer from a kit or from scratch. Est. cost: $30 (kit). Tip on using a thermistor and the joystick port to create a crude thermometer interfaced to a PC. Build an ultra-sensitive infrared-sensing device to detect hot or cold objects remotely. Indicates the temperature difference between the temperature of an object and an arbitrary ambient temperature reference that can be set at any time. Temperature monitor. Complete design details for a general utility temperature indicator sensitive to 1/2 degree, and having a very rapid response time. Uses a low-cost thermistor. Solid-state probe thermometer uses the temperature characteristics of silicon diodes as sensors. Measures up to 200 degrees. Proportional temperature controller circuit uses silicon controlled rectifier. Make this precision electronic thermometer. Uses a National Semiconductor temperature transducer (LX5700) that is easy to calibrate and requires only one simple adjustment. Measures from -20 to +105 degrees. Digital temperature gauge monitors your cars cooling system. Estimated cost: $29. Heat loss sentry. Sensitive electronic thermometer is used to detect heat losses around windows, doors, etc. It can detect a temperature difference of as little as 1-degree Fahrenheit. Sitrat, a highly accurate electronic thermometer that requires only six components and a battery. Measures from -50 to +130-degrees. Est. cost: $12. How to use infrared thermography to detect energy loss in your home. Auto-temp. Low-cost digital clock and thermometer will automatically display the time for six seconds. It then displays indoor temperature for 3 seconds followed by outdoor temperature. Easy-to-build electronic thermometer measures from -30 to +120 degrees F. Thermometer adapter circuit lets you use an ordinary voltmeter (either analog or digital) to measure temperature. Build the dressing consultant. Electronic thermometer measures outdoor temperature (plus wind, sunlight, and rain) and then lights up one of seven pictures indicating how to dress for the weather. Ideal for small children. Build the fishing guide, a water-temperature measuring device that helps you locate the "thermocline" region where fish like to congregate. Using op-amp comparator circuit chips to detect and measure real-world conditions. Circuits for monitoring temperature, light level, voltage, etc. Electronic clock and thermometer is built around the National Semiconductor MA 1026M module. Up to 6 temperature probes may be attached. Reads-out in either Fahrenheit or Celsius. Temperature sensing. How a simple and accurate temperature sensor can be built. How to interface and control it with a computer. Includes software for controlling, calibrating and running the thermometer. Software is for the SWTP 6800 microcomputer, but can be adapted. Inexpensive A/D converter uses serial-polling technique and does not require a multiplexer. Circuit and software for monitoring a thermistor (thermostat) are described. Operates on 8080 computer. Analog-to-digital converter interface is used to monitor the temperature via a MEK6800D2 computer kit. Includes 6800 assembly language program to record and display present, high, and low temperatures. How to build an electronic indoor-outdoor thermometer. Reads temperatures from sensors located at different points and covers a range of -20 to +120 degrees Fahrenheit. Build an all-electric meat thermometer. Circuit for a temperature indicator which lights an LED if the temperature falls within a five or ten degree range. Circuit shown provides 4 temperature ranges. Electronic thermometer uses a VOM or milliameter as the readout device. Est. cost: $5. Experimenting with the analog comparator, a special circuit incorporating the operational amplifier. Circuits include (1) an adjustable light-dark detector, (2) adjustable-threshold temperature-controlled relay, (3) a sine- to square-wave converter, and (4) a peak-voltage detector. Infrared temperature-sensing transmitter and receiver circuits. How to transmit temperature measurements over a beam of near-infrared radiation when it isn't practical to use wires. Thermometer accessory. A simple construction project lets you measure temperatures (Kelvin, Celsius or Fahrenheit) with any voltmeter. Using an LM-335 voltage-mode temperature sensor for electronic thermometry experiments. Digital measuring system. Build a highly accurate, low-cost 3-digit panel meter that serves as the basic building block for a wide range of speciality add-on function modules (digital multimeter, tachometer, thermometer, etc.). Circuits to electronically measure temperature. Temperature probe for your multimeter can measure down to 0 degrees and below. New developments in op amps. Includes circuits for an instrumentation amplifier, thermocouple thermometer, temperature-compensated crystal-oscillator, and a 9-volt to 5-volt converter. Microprocessor control with BASIC. Part 2. Adding a "Tempwatch" accessory to create a smart thermometer. A precision thermocouple thermometer. Voltmeter accessory lets you measure temperature with one-tenth-degree resolution. An infrared thermometer accessory lets any DMM measure temperatures (without requiring physical contact). Est. cost: $50. How to use a stack thermometer to monitor a wood fire for safety and efficiency. Tip: Manual automobile heat gauge can be made into a compost thermometer. Remote thermometer circuit will measure outside temperatures at distances up to 10 feet from the meter. Electronic thermometer gives audible temperature readings. Useful for people with vision problems. Range is 55 to 100 degrees Fahrenheit. Electronic thermometer displays indoor or outdoor temperature at the push of a button. Circuit where switching arrangement allows wide-range relaxation oscillator to operate as (1) electronic organ, (2) metronome, (3) thermometer, (4) code practice oscillator, or (5) siren. Electronic clinical thermometer provides a temperature indication in 30 seconds over the range 96 to 106 degrees. Digital thermometer module for the digital measurements lab featured in the November 1970 issue. Thermometer module covers from freezing to boiling, reporting in both Fahrenheit or Celsius. Est. cost: $17. Low-cost electronic thermometer measures local or remote temperatures from freezing to 302 degrees Fahrenheit, in two ranges (32-122 and 32-302). Digital thermometer uses LED's to display reading. Can have more than one sensor. Est. cost: $20. Circuit uses a transistor as a temperature sensing device. Skin temperature thermometer. Learning to increase and decrease the flow of blood to the limbs can result in control of things like cold hands or feet, migraine headaches, etc. Skin temperature thermometer helps detect blood flow rate. Build a low-cost temperature meter. Electronic thermometer is used to measure operating temperature of electronic components. Measures 20 to 110 degrees Celsius with an accuracy of plus-or-minus 5 degrees. Est. cost: $15. An analog-to-digital temperature converter. Use your frequency counter to measure temperature to 0.1-degree Centigrade resolution. Range is 0 to 100 degrees. Est. cost: $10. Electronic thermometer and digital clock are each powered by batteries which are recharged by means of solar cells. Energy leak detector reveals home heat and cooling losses. A fast response differential temperature detector provides instantaneous readings to check leaks arounds doors, windows, etc. Electronic Christmas gifts built around the TL489C analog level detector. It can be used to make (1) soil moisture detectors, (2) temperature range indicators, (3) controls and alarms for fish fanciers, chemists, chefs and photographers, (4) battery & continuity testers, (5) toys and games, (6) simple light organs, (7) humidity alarms,...etc. Build a 3.5-digit multimeter with either LED or LCD displays, plus a variety of options including a temperature probe. Est. cost: $50. Build a 3-1/2 digit LED digital thermometer. Measures from -30 degrees to +199 degrees F with 1 degree accuracy and 0.1 degree resolution. May be converted to Celsius measurement. Estimated cost: $40. Check your home's heat loss with a degree-day meter which calculates the degree-days based on temperature inside and outside your particular home. Estimated cost: $100. Build a diode temperature probe to give temperature readings on a digital multimeter. Simple thermocouple and op amp/meter circuit to measure the temperature inside a ceramics kiln. Hot-part finder circuit is an audible temperature probe whose output rises in frequency when its tip is placed in contact with a warm component. Bridge circuits. (1) Wheatstone resistance bridge. (2) Temperature shift meter incorporates a standard Wheatstone and detects small changes in temperature. (3) High-voltage static detector incorporates a Wheatstone bridge. A low-cost analog-to-digital converter for your PC lets it function as a data-acquisition tool. Transducer circuits to measure temperature, light intensity, and heart-beat are included. Est. cost: $30. Build an eight-channel analog-to-digital converter to interface your computer with the physical world. Est. cost: $25 (kit). Also includes instructions for building temperature probes. Pyrometers for the workbench. Tips on selection and use of this unique temperature-measuring device to pinpoint a source of heat in automobiles, motors, heating equipment, etc. Simple diode circuits. (1) Bridge rectifier. (2) Sound-level (audio signal) limiter circuit never exceeds 1.5-volts peak-to-peak. (3) DC polarity or AC indicator circuit. (4) Kick-back voltage limiter for inductive loads. (5) Steering circuit controls relays based on voltage polarity. (6) Simple temperature sensor. (7) Circuit for selecting matching diodes. Build an LED thermometer that shows room temperature within two degrees. Est. cost: $23 (kit). Build a temperature adapter for your DMM. This circuit allows you to measure from -40 to +300 degrees Fahrenheit using a digital multimeter. Est. cost: $9 (kit). A hands-on approach to op-amp basics. How they work and three projects to further your understanding of this extremely adaptable device. (1) RIAA phono preamp. (2) RF sniffer. (3) Electronic thermometer. Indoor-outdoor electronic thermometer. Build an electronic "Cold Sleuth" to help you detect cold areas and cracks that let heat escape. Thermistor senses minute changes in air temperature. Electronic meter measures heat and humidity. Electronic thermometer warns of sudden temperature drops. This gives time to turn on furnace to avoid excessive heat loss needed before furnace thermostat registers a temperature drop. Three-range electronic thermometer covers -40 to +60, +60 to 160 and +60 to 85 degrees. Electronic temperature measuring device uses integrated circuits and will display both indoor and outdoor temperature as lighted numbers 1" high. Companion to the electronic clock featured in June 1972 issue. Two-digit electronic thermometer measures from 0 to 99 degrees Fahrenheit. Est. cost: $50. Build a digital thermometer. Accessory converts a digital voltmeter into a thermometer for monitoring semiconductor case temperatures, photo chemicals, etc. Accuracy of 0.5-degrees over a range of -55 to +150 degrees. Est. cost: $40. An in-depth look at a temperature transducer and precision voltage reference all in one IC, the REF-02. Diagram indicates the recommended fabrication of the probe for the Optoelectronics T-100 thermometer. Build this precision digital thermometer. Range of -60 to +200 degrees Fahrenheit. Est. cost: $100. Schematic for a digital temperature sensor and thermometer circuit. Temperature measuring circuits and components. The basic electronics are explained. Build this combination digital clock and digital thermometer. Est. cost: $50. Circuit for an inexpensive electronic thermometer that measures from -30 degrees F. to +120 degrees F. Build this digital temperature gauge to monitor your car's engine temperature. Est. cost: $33. Electronic thermometer circuits using the REF-02. How to use digital panel meters to measure voltage, current, resistance, capacitance, frequency, temperature, etc. Part 2. Temperature and frequency. Using the "Kaltek" RC-103 module, along with common components and a simple calculator, to build an instrument to measure resistance, capacitance, temperature, RPM, length, or angles. May also be used as part of a stopwatch or light meter. All about thermistors. Part 3. Digital thermometer and a temperature-to-frequency converter. Temperature measuring add-on for your DMM. Use your digital multimeter as a precision digital thermometer. Two new IC temperature sensors from National Semiconductor described. Includes a bar-display LED circuit which displays temperatures from +67 to +86-degrees F. Heat-proofing your electronic projects. Part 2. Interesting ways of dissipating heat, and means of temperature sensing and heat injection. Basic circuit for using the AD592 precision temperature transducer from Analog Devices to provide output current that is proportional to absolute temperature. Electronic thermometer displays a range of 40-degrees Fahrenheit on a 16-LED bar-type display. Est. cost: $18. Experimenting with PC-based test equipment. Part 4. Low-cost analog-to-digital converter interface that allows you to measure temperature, displacement, audio signals, and any other 0-5 volt analog signal. Also includes construction of an accurate temperature sensor. Est. cost: $40 (kit). Electronic temperature measurement. What is temperature and how it can be measured electronically. Part 1. Thermistors. Electronic temperature measurement. What is temperature and how it can be measured electronically. Part 2. Thermistor application circuits, RTD's, thermocouples, and non-contact thermometry. Wireless heat detector. Infrared radiation pyrometer measures temperatures up to 25 feet from source. Est. cost: $15. Heat loss sentry for your home. Sensitive electronic thermometer can detect changes in temperature as low as 1-degree. Powered by a 9-volt battery. Build this electronic thermometer which requires just six components and a battery. Measures from -50 to +130 degrees Fahrenheit. Est. cost: $12. Home computer weather station measures wind speed and temperature. Build an anemometer from PVC pipe fittings. Build electronic anemometer and temperature circuits to send data to your computer. Est. cost: $50 (kit). A sensitive electronic thermometer used for making a study in micrometeorology. A rapid response electronic thermometer for investigating temperature fluctuations caused by sunlight on air at low altitudes. Measuring the strength of chemical bonds using titration calorimetry. Includes the schematic for a calorimeter circuit, thermometer circuit and probes. Build a high-precision thermometer capable of measuring temperature to within a few thousandths of a degree C. This electronic device uses a resistance temperature detector. The result is displayed on a digital multimeter. Est. cost: $100. | |||||||||
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