Heart rate monitor
Posted on Dec 14, 2012
New Circuits
-
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
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.....
.
Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log...
Light-emitting diodes connected with reverse polarity provide a visual indication of zero-beat...
LEDs indicate at a glance what the status of the circuit is at any given moment. Once the reset...
The circuit, uses a two-transistor direct-coupled oscillator that has a frequency determined by...
In this laboratory experiment, we need to design the frequency determining network for a 1k Hz...
IRF9540N Gate Charge Test Circuitis schemed in the diagram below. IRF9540N is known to be...
The communications between commercial aircraft and the ground can be interesting, amusing and...
To resolve SSB or CW, a BFO signal may be coupled into the intermediate frequency amplifier. In...
The following circuit shows about Wiring Diagram and Electrical Circuit Troubleshooting Of 1997...
I`ve tried to make drivers for my H-bridge circuit using complimentary emmiters but the square...
RT9179CB use power management chip power supply circuit Shown the way for the introduction of...
Circuit is shown. It consists of a temperature sensor, temperature control of electronic...
characters left: