relay Do I need a protection diode here
Posted on Feb 5, 2014
Related Circuits
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 555 Ic is wired as an astable and the frequency is constant and independent of the duty...
The Circuit is composed of two sections, the light sensing and the power switching. The light...
The "Battery Good" checker. When the button is pressed, the green LED will glow if the battery...
The compact 5 pin L165 IC general a stabilized symmetrical power supply from a single...
This circuit will allow you to place a phone call on hold and if you wish to have them listen to...
This is extremely simple to build PIC Temperature meter that allows to measure temperature in two...
This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will...
Even though i had isolation at the sensors and actuators to make doubly sure the PC also has been...
This project is based on integrated circuit from Holtek Semiconductor HT6221/HT6222. Similar...
The quartz clocks which have dominated time-keeping for the past 20 years or so have one problem:...
A 12v DC electromagnetic lock with push to lock and push to unlock using my existing LED...
As shown in FIG simple audio amplifier circuit. Using the integrated op-amp configuration of...
By master controller LKl-12/90 and a magnetic disk control PQR10A composed of a control circuit....
characters left: