A delay circuit using an operational amplifier
Posted on Mar 28, 2007
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.....
.
The charger described in this article can charge packs of 4 to 7 cells with capacities ranging...
This neat little circuit can play 8 note tunes at any speed you want. You select the notes with 8...
The board has been initially developed to learn with CAN, so a CAN transceiver is available...
A compact, inexpensive and low component count telecom head- set can be constructed using two...
This circuit sent out an alarm when its LDR sensor is exposed to light by sun or lamp. A 555...
Because of the high voltages found in a Charge & Primary sections it seems natural to look for...
Figure 1 is a schematic of such an arrangement with four batteries. The diagram in Figure 2 uses...
Circuit power amplifier circuit in the figure below is a schematic circuit power amplifier with...
Before attempting to build the control circuit, it is recommended that the function of each part...
Imagine being faced with a dozen or more cable ends, all the same colour and bearing no...
Here is a very simple, inexpensive and interesting project which provides lot of fun to a home...
Here is the circuit diagram of a fully transistorized inverter that can drive up to 60W loads....
The heart of an average reading, rms calibrated AC voltmeter is shown in figure below. It`s a...
FIG SD501E is J tie fan IC, which has the following characteristics a 7 5 ±progressive Timing:...
characters left: