Thermocouple Temperature Control
Posted on Jan 20, 2013
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The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower..... -
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to....
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This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in...
The question sometimes comes up of how to cascade 4017 decade counters for more than 10...
Above is a schematic diagram of an LM741 light/dark sensor circuit (from the excellent 741 Op-Amp...
A LED to indicate when a DC voltage reaches 5 volts or more. I don`t want the LED to be dim when...
Consider a simplified circuit of a typical relay as shown in the Fig. 1 usually the relay circuit...
To be able to implement analog to digital conversion using the ADC0804LCN 8-bit A/D converter....
Here is the circuit diagram of an easy subwoofer filter that can be operated from a 12V DC...
C1/C2 operating voltage should be elevated to 25V if you decide to go with a 12V energy source....
If you want to do the ground loop elimination in audio path, you have to cut the galvanic...
Owing to the recent launching in Europe of Cranial Electrotherapy Stimulation (CES) portable...
The Fv-1 has internal circuitry to support an external crystal, preferably a 32768Hz watch...
This circuit is an improved version of the Fig. 3-28 display, using a triangular-wave oscillator....
Produce the varying sampling clock write strobe pulses. So, I settled with this semi-optimal but...
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