1 hour timer circuit with 4011 and 4020 ICs
Posted on Feb 4, 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.....
.
This project describes a new economical solution of home light control systems. The presented...
These items were sold nationally several years ago. The fish would sing, open its mouth, turn its...
A charge pump is a simple means of generating a low-power voltage supply of opposite polarity...
This circuit protects expensive portable equipment against all types of improper hookups and...
The capability to determine which part of the tape is empty and which part has a recorded data...
Here is a very simple circuit that can be used for testing Zener diodes. The IC1 NE555 is wired...
The XC61H series is a highly accurate, low power consumption CMOS voltage detector with a delay...
The Wien-bridge sine-wave oscillator uses a light bulb to stabilize its amplitude. The circuit in...
This project describes how to make a digital voltmeter using a PIC microcontroller. A HD44780...
This is schematic of a synthesized PLL for the Low Power FM transmitter. By the way, you also can...
As shown, the length of the transmission wire current loop circuit will introduce a radio...
Differential input stage uses the integrated differential charge 2SC15 8 3 and 2SA798, the...
Eggs hatch chicks temperature requirements within 36 ~ 39oC temperature range, temperature sensor...
characters left: