Logarithmic light-meter circuit
Posted on Mar 28, 2013
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 circuit produces a sound similar to the police siren. It makes use of two 555 timer ICs...
The regenerative detector uses a field effect transistor (FET). Like with the better valve...
Signals of identical frequency are applied to sync input (Pin 6) and to the demodulator input...
This nonisolated, unregulated, minimum component converter fills the void between low-power zener...
Here is the circuit diagram of an infrared intrusion detector. Whenever a trespasser cuts the...
The circuit provided right here allows up to eight participants with each one assigned a unique...
The filter R1, R2 and C1 integrate the PWM waveform. But what is the point of the op-amp It looks...
A sequencer used for music is a device that sequences musical events for predictable playback....
I decided to make one for $45 in parts. Judging from the components I ended up using, one can...
We`ve all had occasion to be annoyed at inconsiderate dog owners whose animals relieve themselves...
This electronic door buzzer circuit schematic has a very simple function and is very easy to...
The design of this project depends on the sensors. The control module and the robot both contain...
This article describes how to build a general purpose DTMF decoder with a low-price chip from...
V1 and V2 are 12AX7 dual triodes. Each half of V1 is wired as a Class A voltage amplifier in a...
This circuit detects motion within approximately 5 inches of a piezo-ceramic element ultrasonic...
When the input goes from low to high, a narrow positive pulse is generated at point A. This pulse...
characters left: