Photo-Event Timer
Posted on Nov 5, 2012
New Circuits
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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.....
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The MiniLOGGER provides 8-channel analog input(-99mV to +999mV), 1-channel pulse input, battery...
Built around a single 8038 waveform generator IC, this circuit produces sine, square or triangle...
For other input structures see Figures 6 to 11; shown here with PC-filter (Figure ß). The...
The tremolo effect is generated by a repeating volume change at a rate usually between 1 and...
This is a 12V battery checker circuit that uses 3 LEDs that light up at their respective...
One Advantage of these two units is the Sensor can be placed Away from the heater, therefore...
This is a simple proximity switches with IC 4049th The IC4049 is a bipolar monolithic integrated...
Bold lines are soldered connections, arrows are wire based connections. Red for V_cc, Black for...
ITU-R 468 is a standard relating to noise measurement, widely used when measuring noise in audio...
Much of the focus around residential gateways designs has focused on distributing communication...
Objective of this project are to Design a circuit of an electronic infrared communication system,...
This is a guide to becoming a techno rebel: a guide to becoming a radio pirate and raiding the...
The objective of Linkwitz` article was to reduce distorted spatial reproduction when listening to...
In the measurement of changed supply current, the return line of the power -side is grounded,...
An expanded scale voltmeter (ESV) can save your plane. That may be a strong statement, but it`s...
This circuit is based on the 7240 CMOS programmable timer chip (IC3), which has an accuracy of 0....
Another simple connection delay lamp circuit. Turn on the lights, press F SH, power supply by SH,...
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