Repository-circuits
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Pure sine wave inverters are best, however they are expensive to buy or build. Modified sine wave inverters will power some equipment square wave inve.... -
There is a lot you need to know to completely design an inverter. Unless you can acquire a custom made transformer your circuit design is ruled by th.... -
This is a fairly simple schematic of the amplifier and filter. At the core of the circuit is an LM124 op-amp running in an inverting configuration. Th.... -
Mousebot from Make vol 2 is a fun introduction to robotics. So fun that I`ve created this expanded documentation of a Mousey build from start to finis.... -
The hardware within this circuit involved a Picaxe 18M2 IC which is the programmable micro-controller in my design which can be programmed using a PC,.... -
This my fist project with SMD circuit. I ignored SMD because the small sized parts are confused me. The circuit of current SMD project is the headpho.... -
The schematic diagram (see picture) and electronic assembly are fairly straightforward since most of the magic happens in the microcontroller code.... -
This Photo Instructable shows how to use two old phones as a cheap intercom between Point A and Point B. Might be useful between the house and the sh.... -
Let me begin by saying I built my buffer board with a specific project in mind but I`d like to present it here as more of a general application devic.... -
This Audio Mixer mixes multiple audio inputs to a single audio output, with knobs to control the volume of each channel. My particular build features.... -
This instructable is intended to show you how to make several different filter circuits, in particular, low pass and high pass filters, along with a.... -
Build a Hackduino board as explained here. Cut the speaker off of your wireless doorbell receiver. Leave as much wire connected to the receiver as yo.... -
This works in a way that the phone line won`t stay busy while the LEDs are connected and when you pick up the phone, the light goes off and allow you to use your phone normally. hello. u sadi that ur phone delivers 48 v DC n when phone rings, it delivers 96.... -
Note: If you would like to learn more about the circuit that powers the Sifteo Base audio read on! Otherwise feel free to skip to the next step. Our.... -
Here`s a really simple and inexpensive ($1) LED driver circuit. The circuit is a constant current source, which means that it keeps the LED brightne.... -
PIC microcontrollers are a very useful and versatile tool for use in many electronic projects. They are very inexpensive and easy to find. They are al.... -
2N3904 is the NPN transistor. Looking at the flat face, the left lead is Emitter (pin 1 in schematic), the middle lead is Base (pin 2 in schematic), the right lead is Collector (pin 3 in schematic). Another end of 50 Ohm resistor to +5v pin on Arduino. (An.... -
This also Not a Cell phone jammer. Jamming a Cell phone is similar on its principle, but totally a different build, you need a range from 800MHz to 900MHz. You need an OP amp and a few other parts and formulas The Radio Jammer sends out a EM wave at a.... -
This product includes some logic circuitry used to control the timing of the output pulses, which will be discussed in a later step. The logic circui.... -
This is my first autonomous robot. I built it to explore the interfacing of various sensors to a PICAXE processor. His mission is to search for a magn.... -
Here`s the schematic for the circuit. Solder all the components onto perfboard. Sorry the drawings kind of bad. Basically, the 555 timer sends a pulse.... -
Hi i am ajinkya this is my first Instructable -SIMPLE WATER DETECTOR For this project u will need the following parts: 1.IC 555 timer-1 2.Small size g.... -
If you look carefully at the schematic you will notice the input is feed into the voltage divider. This is because the Schmitt Triggers all turn on a.... -
the rest of the pictures show the construction of the sub. It was made out of two C channels connected by an aluminum sheet. A skid was added to the bottom to allow the sub to skate over the bottom to gather quantitative video samples of the ecology. The.... -
Designed for any purpose that might need a very sensitive, any-direction, do-not-tilt switch. This instruction describes construction of: 1) My initia.... -
The schematic diagram for the circuit is given in the picture above. Like its name suggests, a comparator compares two given voltages. The pair of 1K.... -
The switch has been mounted inside the tap of the handlebar. I`ve make the battery holder out of an old flashlight. As you can see in the video in step 1, i`ve put the sireen inside the left end-bar grip and the wires pass under the tape and inside the tube.... -
I recommend breadboarding the entire circuit first. It was way easier on a breadboard that trying to figure out what goes where on a tiny piece of pr.... -
In order to switch some floodlights by my Arduino, the small switch circuits I built around a 39mf22 were just not man enough to handle the current ne.... -
In this instructable I`ll show you how to build a detachable solar panel and battery charger for your backpack. This can power or charge all your gadg....
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.....
Popular Circuits
The completed board may be driven by voltages between .8 and 3 Volts. While the basic design goal...
This audio processor is based on the Signc tics/Philips TDA3810N stereo, spatial, pseudo-stereo...
Display lights problem on Nokia N73 can be caused by several reasons, for example broken path on...
This simple circuit shown int the schematic diagram actives the switch using sound. We can use...
Here is an interesting hobby circuit of a crank door bell! The circuit is built around a timer...
ADC 207 is the first to use Flash Converting An Advanced High Speed VLSI 1. 2 micron CMOS...
It is developed that the ones that assist driving system intelligent improvement and car...
The Digital-Analog-Converter fetches one of 15 parallelly pressed keyboard keys from the digital...
Most surviving TR-1s no longer work. Many collectors (such as myself) prefer to keep them in...
In the measurement of changed supply current, the return line of the power -side is grounded,...
IC1, an Intersil ICL7106, contains an a/d converter, a 3 1/2-digit LCD driver, a clock, a voltage...
The type C system was first installed about 1925 and has been very extensively used. It...
This small device, intended primarily for modellers, allows an instant reading of the time I of a...