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Total Found: 27
NTC protection circuit three-phase asynchronous motors
Semiconductor thermistor embedded thermal protection element belongs, it is sensitive to temperature,
Heater temperature controller
The circuit can control up to 6 kW of heating, with moderate gain, using a 25-amp triac (SC260D). Feedback is provided by the negative temperature co-efficient (NTC) thermistor, which is mounted adjacent to the environment being temperature controlled. The temperature set potentiometer is initially adjusted to the desired heating level. As the...
In the case where analog signals are being used as the logic control, hysteresis from a Schmitt-trigger input can be used to prevent haH-wave power output. The circuit operation is as follows: at low input voltages, Q1 is biased in the off state. Q2 conducts and biases Q3, and the IRED turns off. When the base of Q1 reaches the biasing...
Universal Video Interface Circuit
This combination sync stripper and universal video interface can solve a lot of problems for you, including Super-Nintcndo-to-anything interfacing, video overlay and scope TV frame locking. Kits, fully tested units, and custom cable assemblies are available tlirough Redmond Cable.
One circuit thermistor relay contacts to prevent competition
Competition is ~ relay contacts contactor control systems often encounter problems, too much trouble to deal with, and sometimes need to add a lot of elements to add. However, if the use of negative temperature coefficient thermistor (NTC) delay switching
NTC phase asynchronous motor protection circuit
Semiconductor thermistor embedded thermal protection element belongs, it is sensitive to temperature, temperature error of 5. Its reliability, small size (diameter 3. Smm), easy to install, easy to embed winding, use it as a temperature sensing element can
TC649 motor drive circuit with overheat protection
Motor is heating devices, by accident or overload often caused when the coil winding temperature is too high, as shown in FIG. 1-9 TC649 motor overheating protection and drive circuit. NTC thermistor RT close to the motor of the motor temperature detection, RT,
Over-Temperature Alarm Circuit Uses Common Inexpensive Components
Over-Temperature Alarm Circuit Uses Common, Inexpensive Components | Negative-temperature-coefficient (NTC) thermistor, ICs.
Temperature to Voltage Converter Circuit
With this simple temperature to voltage converter circuit we can do a precise measurement of the temperature in a room. A NTC resistor or a thermistor is u..
Resistance Thermometer Current Loop Transmitter
Resistance temperature sensor (RTD, resistive temperature device) comes in NTC (negative temperature coefficient) and PTC (positive temperature coefficient)..
40W 4 channel audio amplifier
With the integrated audio TDA8571J designed for automotive applications, this circuit can expand the sound of the car radio or connect a portable MP3 playerin it. Internally, thechiphas eightoperationalamplifierseton the bridge, allowingeachspeaker terminalbeing energized. Dontconnect thenegative terminal ofthe mass ofthe speaker,...
Solar Panel Testing Shunt Schematic
Can a homebrew FET circuit replace a NTC
Design cicuit using a power mosfet to replace the NTC (thermister) that many Mag623 users employ to prevent their bulbs from flashing. Although inexpensive and easy to hook up, NTC`s run quite hot. They are also affected by ambient temperature, require a cool down period and generally have a tolerance +/-20%. I was hoping a simple FET circuit...
The Sentient City Survival Kit is a project of Creative Capital. It is sponsored by the New York State Council on the Arts (NYSCA) and the Office of the Vice President for Research at the University at Buffalo. Additional support provided by the Network Architecture Laboratory @ Columbia University`s Graduate School of Architecture, Planning and
QAMI5516 SINGLE MODULE DEMODULATOR AND DECODER IC FOR DIGITAL VIDEO SET-TOP BOXES QAMi5516
500 Series immersion temperature probe, NTC, 100, 000 Ohm, ±1, 5 °C [2. 7 °F] tolerance, 10 °C to 260 °C [50 °F to 500 °F] accuracy, stainless steel, bullet housing, flying leads (two), 26 gauge Teflon insulation, 4, 267 mm [168 in]
Cat Repeller CircuitRepellentCircuit555 Ultrasonic Circuit
With this cool cat/dog repeller circuit you could chase the cats off from any where you want. In fact, I designed this circuit to chase my cat from my computer table. Most of the animals like cats respond violently to ultrasonic sound and in fact it`s the best way to chase them off. This principle is employed in this circuit. The circuit here is n
simple hot water level indicator using ntc
fan control circuit using ntc and tl082
R1 15k ohm resistor. NTC Thermistor- 10k ohm, sold at Radio Shack in the states. P1 10k ohm potentiometer - sets the low speed(voltage) of the fans at the cool temperature. P2 50K ohm potentiometer - sets the gain of the circuit - how fast the voltage will rise to full output when the temp is higher. TL082 a op-amp that I had handy, most any singl
Electronic Circuit Schematic Automatic Fun Controller using NTC TTC3A103 as Temperature Sensor
Temperature controlled fan regulator
This fan regulator circuit will automatically control the speed of your fan according to the temperature. Two thermistors (R1 and R2) are used to sense the temperature. The circuit works almost like the published here previously. Here the potentiometer is replaced by the thermistors. When the temperature is increasing the resistance of NTC thermis
Digital Inputs Equivalent
Temperature limit Relay
This circuit, is basically a resistance ? sensing window switch, except that the ?resistor? takes the form of an NTC thermistor and the circuit thus responds to temperature. TH1 must have a resistance in the range 500ohm - 9Kohm. RV1 is used to set half ? supply volts on the RV1 ? TH1 junction at the ?mean? temperature.
Built-in battery charger, Li-Ion
Build-in charger for instruments powered by single lithium-ion or Li-Pol accumulator. If external power supply not conected to charger, current back from the accu charger is very small. New version improved temperature stability and Not Needed NTC thermistor. After a simple adjustment can be from initial engagement to launch a thermistor to...
Digital Thermometer using
The most common appl icat ion for the NTC thermistor is temperature measurement. Accurate temperature measurement can easily be accomplished by interfacing a Wheatstone Bridge, 6K/30K ohm thermistor network and a digital voltmeter integrated circuit as illustrated in Figure 5. The IC consist of an analog to digital converter with...
PWM fan controller
Microchip Technology (www.microchip.com) offers a family of cooling-fan speed controllers that operate in PWM mode for use with brushless dc fans (Reference 1). To control fan speed using the PWM waveform`s duty cycle, you can use either an external NTC (negative-temperature-coefficient) thermistor or one of Microchip`s PIC microcontrollers and...
DC 2 speed Motor Controller
The simplest of all motor controllers (besides a straight on/off switch) is the contactor controller. I designed this contactor controller for use in my electric scooter project. It is based around three 12V relays, two 12V batteries, two switches and of course a motor. Having no silicon to "fry", it is quite reliable and robust. A contactor...