|
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....(electronic diagram added 6/03) |
|
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! The values and components are not critical;....(electronic circuit
added 8/03) |
| 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. |
|
Temperature controller keeps IR detector at 8ºK - 01/07/99 EDN-Design Ideas:
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, which need cooling to near
liquid-helium temperatures. Furthermore, the sensitivity of these detectors can be
temperature-dependent. The optimal operating temperature for.....(design idea added
08/05) |
|
Temperature controller saves energy - 02/03/05 EDN-Design Ideas: Given the
high cost of electrical power, replacing a conventional on/off temperature control
with a proportional controller can often save energy and money. Figure 1 shows a
low-cost, high-efficiency, time-proportional temperature controller for a residential
water heater. An Analog Devices ADT14, IC1, serves multiple functions as a temperature
sensor, quad-setpoint, programmable analog tempe.....(design idea added 5/05) |
|
Temperature Data Logger - (circuit / schematic design added 6/06) |
|
Temperature Monitor - (diagram added 8/03) |
|
Temperature monitor and fan controller reduce fan noise - 05/10/01 EDN-Design
Ideas: (design idea added 2/06) |
|
Temperature monitor measures three thermal zones - 12/11/03 EDN-Design Ideas:
You can use an ADT7461 single-channel temperature monitor; an ADG708 low-voltage,
low-leakage CMOS 8-to-1 multiplexer; and three standard 2N3906 pnp transistors to
measure the temperature of three separate remote thermal zones (Figure 1).
Multiplexers have resistance, RON, associated with them;.....(design idea added 1/05) |
|
Temperature Programmer uses Digital Control - 07/18/96 EDN-Design Ideas:
(design idea added 3/03) |
|
Temperature Regulator intricate-ms - (diagram added 8/03) |
|
Temperature Sensitive Oscillator - Temperature controlled based on AT89CX051
(added 8/03) |
|
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) |
|
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) |
|
Thermo Cooling Fan - Use a 12V computer fan to cool your amp. Uses diode
temperature sensor f (added 5/02) |
|
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. |
|
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) |
|
Thermostat Control for Electric Heaters - ….(electronic schematic added 12/08) |
|
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) |
|
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) |
|
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) |
|
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. |
|
Universal Compensator Neutralizes Temperature Coefficient - 05/25/95 EDN-Design
Ideas: (design idea added 3/03) |
