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T V Remote Control Blocker - Don't like your little brother's TV channel
selection? Hate the volume your wife sets the stereo at? Want to just annoy
someone? This circuit does all that and more by jamming most IR remote signals.
The circuit releases a flood of pulsing IR light that confuses the reciever by
corrupting the data stream....(added 4/02) |
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Taking the Uncertainty Out of Thermocouple Temperature Measurement - AN-274
Analog Devices Application Note (app note added 6/06) |
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TC64x/TC64xb Demo Board for Fan Speed Controllers - Fan control module allows
the user to quickly prototype fan control circuits based on the TC642 or TC646 PWM
Fan Control IC's. Its uses though hole components for easy user assembly and
evaluation. (app note added 6/06) |
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Telephone Operated Remote Control using PIC16F84a Microcontroller - This
design controls up to 8 devices using a PIC microcontroller (PIC16F84A) connected
to the phone line. The unique feature here is that unlike other telephone line
based remote control, this device does not need the call to be answered at the
remote end so the call will not be charged. This device depends on number of rings
given on the telephone line .... (added 10/05) |
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Telephone Record Control (Randy Linscott) - This circuit will allow you to
connect any tape recorder that has a mic and remote input to a phone line and
automatically record both sides of a conversation when ever the phone is in
use.You will need to take a couple of voltage readings before connecting the
circuit….(added 04/05/06) |
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TeleRemote Control - (circuit / schematic design added 6/06) |
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Temperature Controled Fan - This circuit controls very accurately a fan of any
size. Just adjust the associated resistors for a different type and you're
all set. The above circuit diagram is for a small cpu-fan, rated 12V at 12mA
current….(Tony van Roon's circuits added 08/09) |
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Temperature Controlled NICD Charger - This circuit is for a temperature
controlled constant current battery charger. It works with NICD, NIMH, and other
rechargeable cells. The circuit works on the principle that most rechargeable
batteries show an increase in temperature when the cells becomes fully charged.
Overcharging is one of the main causes of short cell life, hot cells pop their
internal seals and vent out electrolyte. As cells dry out, they lose
capacity....(diagram added 6/03) |
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Temperature Controlled Ovens - Here is a simple temperature controller
suitable for a variety of purposes; it was designed to heat the copper float out
of a toilet for a barometer!....(electronic circuit added 8/03) |
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Temperature controlled Triac for a fan - ….(circuit design added 12/08) |
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Temperature controller has take back half convergence algorithm - 09/15/05, EDN
-Design Ideas.....(design idea added 11/05) Enhanced closed-loop control
balances stability, responsiveness. |
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Temperature Controller keeps IR Detector at 8şK - 01/07/99, EDN-Design Ideas:
[Note: File contains multiple circuits scroll to find this circuit]
Sensitive infrared array detectors must operate at a low temperature to avoid
thermally generated dark current throughout the photoconductive elements. This
requirement is particularly true for SiAs array detectors,.....(design idea added
6/06) |
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Temperature Monitor - (schematic / circuit design added 9/02) |
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Temperature monitor and fan controller reduce fan noise - 05/10/01, EDN-Design
Ideas: (design idea added 6/06) |
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Temperature Programmer uses Digital Control - 07/18/96, EDN-Design Ideas:
(design idea added 3/03) |
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Temperature Regulator intricate-ms - (electronic circuit added 5/02) |
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Temperature Sensitive Oscillator - Temperature controlled based on AT89CX051
(added 6/03) |
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Temperature Sensor Control - A basic circuit using Diodes to detect
temperature differences....(design added 12/08) |
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The HC11 Controls the Stepper - (circuit / schematic design added 07/08/09) |
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The Smart Start ™ Technique for BLDC Motors / ABR-42020 - Fairchild
Application Notes / (app note added 6/06) |
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The Subscriber Line Card in a Distributed Control Switching System - National
Semiconductor Application Note (app note added 6/06) |
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Theremin Controller - (circuit / schematic design added 6/06) |
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Thermal Cooling Fan Controller - As we begin to enjoy those lazy hazy days of
summer, the most important thing on most of our minds is how to keep cool during
those hot days. For some of us that means turning up the old air conditioner and
sipping on a nice cold glass of our favorite soft drink. However, we often forget
about an equally important.... (electronic design added 6/07) |
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Thermal Fan Controller (Rod Elliott (ESP)) - Excellent addition to your
laboratory power supply (circuit added 11/06) |
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Thermistor Temperature Controller - ….(circuit design added 12/08) |
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Thermo Alarm - The Th1 thermistor is a regular NTC (Negative Temperature
Coeficient) of about 1000 ohms. But other types will work too. Adjust
the sensitivity with the 20K trim-pot P1. When the thermistor is at operating
temperature, the resistance is high The 330K resistor (R3) is to introduce a
little bit hysteresis back on the basis of Q2 to prevent relay chatter....(Tony
van Roon's circuits added 08/09) |
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Thermo Cooling Fan - Use a 12V computer fan to cool your amp. Uses diode
temperature sensor f (added 5/02) |
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Thermocouple Signal Conditioning Using the AD594/AD595 - AN-369 Analog Devices
Application Note (app note added 6/06) This application note reviews
thermocouple basics and illustrates circuit designs for thermocouple signal
conditioning using the AD594/AD595. |
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Thermoelectric Controller Scriptable Thermometer - A unified thermometric
controller that can be programmed with simple scripts, integrating the "classic"
thermometer/controller pair. You can build a variety of simple machines with the
same hardware and a different script : a charting thermometer, a vending machine
that dials your number when empty, a leavening cell.... (added 09/05) |
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Thermostat Control for Electric Heaters - ….(electronic schematic added
12/08) |
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Thermostat for 1KW Space Heater SCR controlled - Here is a simple thermostat
circuit that can be used to control a relay and supply power to a small space
heater through the relay contacts. The relay contacts should be rated above the
current requirements for the heater. Temperature changes are detected by a ....
(added 6/06) |
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Thermostat, #2 - The R2 thermistor is a regular NTC (Negative Temperature
Coeficient) of about 1000 ohms. But other types will work too. Adjust
the sensitivity with the 10K trim-pot P1. When the thermistor is at operating
temperature, the resistance is high....(Tony van Roon's circuits added 08/09) |
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Thermostat, #3 - The LM3911 requires only a few resistors and capacitors to
turn it into a full-function temperature controller. The schematic diagram
illustrates the simplicity of the overal circuit. The resistor network
consisting of R1, R2, and R3 are used to provide the set point voltage for the
feedback input of the LM3911....(Tony van Roon's circuits added 08/09) |
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Three-Phase Brushless Motor RPM Controller - The TPIC43T01/02 is a monolithic
motor control integrated circuit designed to provide RPM control to a 3-phase
brushless dc motor. The device provides two analog sensor input ports which
include a speed sensor interface and a Hall effect position interface. The speed
feedback interface consists of an FG amplifier to receive an external sinusoidal
signal .... (application note added 10/06) |
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Time delay relay uses proximity control - 03/15/01, EDN-Design
Ideas:.....(design idea added 6/06) |
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Timer controls DSP filter frequency resolution - 04/13/95, EDN-Design Ideas:
(design idea added 6/06) |
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Tiny Robot - Recently many kind of robot contests have being opened and some
interesting reports of the challenge are found on the web. The Line Following is a
kind of the robot contests to vie running speed on the line. I build a tiny line
following robot which can run on the desk, moving the key board aside will do. It
is for only a personal toy reduced i.... (added 9/04) |
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TinyIR Learning IR Remote Control Receiver - Adding IR remote control to your
next project, or to an existing one just got a whole lot easier. With TinyIR, just
apply power, train the chip to recognize the key codes you want to use, and you're
ready to go. Code patterns are safely stored in internal non-volatile EEPROM. The
chip can be re-trained many times if needed.... (electronic circuit added 6/07) |
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Touch activated timer switch extends battery life - 07/10/08, EDN-Design
Ideas: Designed to fit into the battery compartment of an optical mouse,
this circuit automatically shuts off the battery after a time delay.....(design
idea added 09/08) |
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Trace dimension control reduces crosstalk - 02/17/97, EDN-Design Ideas:
(design idea added 6/06) |
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Traffic Light Control Circuit 74145 - This page features a circuit that has
twenty open collector outputs that turn on one at a time in a continuous
sequential manner. The circuit make use of the 74LSxx family of TTL integrated
logic devices. The circuits…(added 7/03) |
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Traffic Light Controller - controls on3 LED traffic light sequence (added
7/03) |
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TRIAC Light Controller - This project is intended for controlling mains
powered disco lighting, although there are many other possible uses for
controlling almost any mains appliance. It will control five seperate channels at
up to 3 Amp per channel. This could be increased by designing another PCB with
wider tracks than the PCB included with this design.. (added 2/06) |
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TRIAC Light Controller zen22142 - (diagram added 6/03) |
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TRIAC lighting and heating Controller uses few parts - 09/02/04, EDN-Design
Ideas: The triac lighting-control circuit in Figure 1 is small and
inexpensive because load and housekeeping power come directly from the line
voltage, thereby eliminating bulky, expensive supplies. The CLZD010 closed-loop
controller maintains constant light intensity by automatically adjusting the
timing of the triac's firing until the feedback signal and setpoint command are
equal.....(design idea added 1/05) |
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Turn on the aquarium lights every day at the same time - Turn on the sprinkler
or the aquarium lighting for the same period of the day. You can choose to operate
the output by every 2nd, 3rd day only. There is a manual start/stop button to
immediately turn on or off the output, and a disable button to completely turn off
automatic operation.....(design added 05/09) |
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Two Button Motor Controller - Two small pushbutton switches, a few diodes and
two relays form a method to control on/off power to a brush motor as well as the
motor direction. The circuit was originally designed for a motorized lifting
platform. ….(designed by David A. Johnson) |
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Two Chips Simplify Layout for High End Embedded Control - 04/10/99, EDN-Design
Ideas: [Note: File contains multiple circuits. Scroll to find
this one.] If you are considering using one of the 32or 64-bit RISC µPs from
Integrated Device Technology (IDT), the company’s new RC32134 and RC64145
system-controller ICs (Picture)can make your job easier. The chips provide
synchronous-DRAM,.....(design idea added 6/06) |
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Two Components Drive Stepper Motor - 01/19/95, EDN-Design Ideas: (design
idea added 6/06) |
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Two Light Controlled Relays - These two circuits use LDRs (Light Dependent
Resistors). Circuit No.1 energizes the relay when the light rises above a preset
level. Use it to switch things on at dawn. Circuit No.2 energizes the relay when
the light falls below a preset level. Use it to switch things on at dusk. |
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Two Signals Easily Control Tricolor LED - 09/14/95, EDN-Design Ideas:
(design idea added 6/06) |
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Two Temperature Controlled Relays - These two circuits use Thermistors
(Temperature Dependent Resistors). Circuit No.1 energizes the relay when the
temperature rises above a preset level. Use it to switch things on when it gets
hot. Circuit No.2 energizes the relay when the temperature falls below a preset
level. Use it to switch things on when it gets cold. |
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Two Wire Remote Microphone Amplifier - (electronic diagram added 6/03) |
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Two-wire Lamp Flasher - This circuit has been designed to provide that
continuous light lamps already wired into a circuit, become flashing. Simply
insert the circuit between existing lamp and negative supply. Especially suited
for car or panel pilot lights, this device can drive lamps up to 10W....
(design added 10/06) |
