Top Circuits Page 242
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The circuit our localizer is based on consists only of a quad-band GSM/GPRS module interfaced with a a microchip microcontroller which, after initializing the I/Os and UARTs it has at its disposal, puts the main program in a loop waiting for some event,....
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The entire control is handled by a Microchip PIC18F46K20-I/PT microcontroller, programmed with a firmware that controls the GSM/GPRS module`s activity, reads the logic condition of the two opto-isolated inputs and sends commands to the two relays in the....
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Power is supplied by continuous voltage, not always stabilized (applied to PWR + and -) at a value between 5 and 32V; such voltage is filtered at the bottom by the diode protecting against polarity inversion (D1) through condensers C1 and C2. Fuse F1 enables....
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The entire remote control is handled by a PIC that controls the GSM/GPRS module`s activity, reads the room temperature through a Dallas DS1820 smart probe, controls the logical state of two opto-isolated inputs, and gives commands to the two relays. In....
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This GSM Mobile is used for our Remote Control (for example Gate Control, Temperature Control . ). We use the word module` because, unlike what we did in ourremote control projects, this time around the mobile phone is not mounted on a printed board, but....
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The full GSM thermostat is managed by a Microchip PIC18F46K20-I/PT microcontroller, programmed with a firmware that controls the temperature and takes care of the communication with the GSM module which is the component named GSM; this is, in fact the small....
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Connected to a burglar alarm or fire alarm in the event of making phone calls playing voice messages. Controlled via DTMF actuators can operate on the spot. In recent years we have introduced several telecontrols based on the SIM900 GSM module. We released....
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The device is based on a GSM/GPRS module with included GPS. Its main function is to detect and communicate its own geographical position using, on the choice, the cellular phone reference system or the GPS. Its small dimensions are due to the use, for the....
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One of the most interesting shield that you can mount on the Arduino platform is certainly the ethernet shield, because enable numerous networking applications such as remote control of systems and users, web access and publication of data, and more yet, the....
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A localizer without GPS. We remake the old device with the cheaper SimCom module SIM900. In the previous post we present the GSM section and now we can present the complete localizator. This system allows for localization without directly using GPS....
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A wood table with many holes with different diameters that house the optical fibers. The size of the ceiling lamp (90 cmx 60 cm) did not allow me to use a single bundle of fibers and this is the reason of the two beams I used, each of which comes with a LEDs....
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The system consists of two parts: the Arduino board that detects the led pulses and sends the data via the XBee module, and a PC that recive the data through a USB/Xbee module and processes the data with LabVIEW so you can prepare and study the consumption....
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The idea behind this post is to bring together some robot designs and trasform them in a new device with new hardware and standard software (arduino of course) and so easier to use. These robots have three things in common: a mechanical structure, the....
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The printed circuit board, has a pin strips (10 pin x 2) used to connect with the circuit board of the remote control device. The pin 1 (ON/OFF) is used by a microcontroller to turn the GSM module on and off. The module is turned on or off according to the....
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Using an ATmega 2560 and therefore the heart of Arduino, we have developed a universal remote control with GSM. This allows to control 2IN/2OUT, DTMF key, gate control and GSM thermostat activated remotely. The remote control is easier, thanks to the....
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Determining which drive wire is which on a unipolar stepper motor. This is the type of motor that I have most commonly found surplus or in salvage equipment Platform: PIC16F877A using BoostC connected via rs232 to a PC running a terminal program. The PIC....
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The simple circuit offers no isolation, but the simplicity of the circuit combined with cost of sound cards and the fact that diodes 1 and 2 add a good measure of protection makes this circuit ideal for the average user. Notice the physical hardware includes....
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There is also a version without SMD. This version is called 2. 1, slightly larger (80 * 100 mm) and equipped with dual drivers (to 1A load), but runs with the same software. The input voltage of the external power supply is fed to X2 (15V), type of....
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The vehicle acts in any way at this point electronically - for example, by its metal (change frequency of an oscillator) or by its components (eg RFID) Depending on the method used different grades of security and error tolerance can be acheived. Even....
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This software was written for this hardware. Therefore the pin allocation of the Atmel Attiny2313 in this curciut corresponds to the orginal of So the software will run on both hardware platforms. Important note: The processor AT90S2313 requires an external....
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Xpressnet is a bus system for model railways to interconnect input devices, computer interfaces and stationary decoder or feedback detectors. Many commercial input devices (including the multi-mouse from Roco) are based on this bus. The following adapter....
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The tracker is easy to build on a perfboard. I used a basic one-pad-per-hole perfboard and 26-gauge wire, but 30-gauge would probably be better. All the electronic parts are available from Mouser Electronics. Radio Shack sells the perfboard and the 2. 5mm....
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The Finder is a prototype of that device. It is a keychain-sized GPS device with two buttons, Save and Find. Pressing Save records your current location. Pressing Find visually leads you back to the saved location. Up to 9 locations can be saved. Press the....
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The Open Source Automation project is free automation software that runs on Windows and requires no programming to setup. It has a nice graphical interface and has unique features that high-end security and automation systems do not. OSA is still in early....
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The telemetric physiologic monitors transmit measurements of bodily functions from beneath the skin of a live animal to a receiver beneath the animal`s cage. The smallest transmitters the company makes, are their " mouse " transmitters. These were of....
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Developing a transmitter small enough to be implanted in the body of a rat, fast enough to transmit four hundred sixteen-bit data samples per second, powerful enough to be detected at a range of three meters, and efficient enough to operate for three months....
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The Data Recorder (A3007) is a LWDAQ Device that decodes and recordes subcutaneous transmitter ( SCT ) messagess. The A3007 takes the signal generated by a demodulator such as the Demodulating Amplifier ( A3017 ) and determines when this signal contains a....
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The A3008, when plugged into the same LWDAQ Multiplexer, can create bad messages in a Data Receiver ( A3018 ). Set the A3008 local oscillator to its minimum (DAC count 0) or maximum (DAC count 255) frequency to reduce the bad message rate. Even better:....
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The Subcutaneous Transmitter (A3013) transmits biometric signals from within the body of a live animal. It is the implantable transmitter component of our Subcutaneous Transmitter System. The A3013 detects biometric signals with flexible 150-mm leads,....
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The RF Tester (A3014) is a combination of four circuits. Its purpose is to test several circuit ideas, both by implementing them, and by providing better support circuits for their development. The Modulating Transmitter (A3014MT) replaces our original....
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The RF Combo (A3016) is a combination of three circuits. Its purpose is to provide circuit boards for Stage Four of our subcutaneous transmitter development. The printed circuit board has the same outline as the RF Tester ( A3014 ). The SAW Oscillator....
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The Demodulating Receiver (A3017) contains a 902 ’930 MHz 30-dB amplifier, a downshifer, a 60-dB 50-MHz limiting IF amplifier, a frequency discriminator, and an amplitude demodulator. The A301701A circuit board also includes, just for good measure, more....
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Always use shielded LWDAQ Cable to connect the A3018 to the LWDAQ Driver, not Ethernet cables. The shielding stops the cable acting like a radio-frequency antenna. The correct wiring gives the data transfer more immunity to static discharge, as we discuss....
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The Test Transmitter (A3020) is a combination of three circuits. Its purpose is to allow us to test the Subcutaneous Transmitter ( A3019 ) and to investigate SAW (surface acoustic wave) VCOs (voltage-controlled oscillators). The A3020 contains the complete....
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The Antenna Combiner (A3021) is an active combiner for four 50- © coaxial antenna connections. The output is a combination of the four inputs with net gain of roughly +11 dB. The A3021 is intended for use with four Loop Antennas ( A3015B ), each of which is....
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The Command Transmitter-Receiver (A3023) is intended to test the command receiver we propose for the ISL (Implantable Sensor with Lamp) in our Conceptual Design. The A3023 is a LWDAQ Device in two parts. The Command Transmitter section contains a 146-MHz....
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The Implantable Lamp (A3024) is a radio-controlled lamp powered by a battery. Once encapsulated in epoxy and silicone, it is water-proof and compact, so so that it may be implanted in an animal. The A3024 can, in theory, be activated by any....
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This webpage describes a highly efficient LED dimmer, or a dimmable LED flashlight, or a switching current source, or whatever you want to call it. Cheap, single-IC, uses commonly available parts, easy to build. Designed to get the longest light out of a....
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Use the program to fit your needs at the woven tules of his roses in a single adobe 3 mac card. Thus, that implements the read portion of the system is idle, the controller can be as shown in Figure 1. It contains the address, cheapest microsoft is supposed....
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Avoid drilling extra holes and making changes to the chassis and pcbs by all means. This will decrease the value of your amp since you will not be able to restore it to the original state anymore. Make sure to take pictures of the original state of the amp,....
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This is based on a circuit from the superb electronics info pages at. If you want to know more about IR remote controls, from circuit details to data protocols, look there for info (under `remote control`)! This design allows multiple transmitters and....
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The circuit in the schematic below is an infrared transmitter. The infrared beam is transmitted in a nearly line-of-sight pattern to another device with an infrared receiver. The plotted waveforms are the output voltages of the two intermediate stages....
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In the picture above, Oscium`s iMSO-104 oscilloscope is measuring the output waveform of an infrared receiver (IR Rx). The iPad and iMSO are functioning as the oscilloscope for measuring the receiver`s output signal as the relative alignment between....
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By the ultrasonic sensor, control and display (or buzzer) and local composition, it can tell the driver his around obstacles by voice or a more intuitive display case. Relieve the driver stop, reverse and start to visit around the vehicle caused by problems,....
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Fixed some issues with the benito arduino programmer and upgraded it to the latest version of the LUFA library. I hadnt noticed that there was a miss match between the. inf and the library supplied descriptors. My appoligies to the two xp users. As this is....
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The battery charger pictured here is a real beast. It will dump 60 amps into a 12 volt battery bank that is low, and will taper down to about 10 amps charging current as the batteries fill. Total cost, $20! The basis of this charger is dead 1000 watt....
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This is the circuit diagram for each individual channel; Note: I replaced the 0. 1 uF timing capacitor with a 100 pF capacitor for better operation, with the 0. 1 uF capacitor in place, the fans would growl when turned down to slower speeds and the 100 pF....
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All of the parts in this list are generally available through Radioshack for less than $20. I highly recommend using breadboard! You`re bound to make mistakes your first time and soldering it will only make your fail worse (double fail ). I`ve compiled this....
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It is a complex component to say the least. It is as if it is composed of 3 caps being 2 virtual plus the known cap itself. On my first graph I am showing the log of the progess of the running and sucessfull version shown on my youtube videos. Voltage is....
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The nicety of air coils: one can build them at home rather easily and they seem to swing at a higher inaudible frequency above 100 KHz. May be the frequency comes down once really huge coils achieve an inductance comparable to ferrite core coils. But I hope....
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14 watt equivalent light with just 1. 2 watts input. No, the light will be brighter and brighter as you approach the watt rating of the CFL bulb. What`s remarkable is that this circuit can light this CFL at very low voltage or higher too. A dimmable CFL is....
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Is it (when operated through a spark gap) allways a quarter wave, or a half wave or multiple of a whole wave so that there are 2* n maximums that are achieved. Can someone point out to sources that are related to creating standing waves and the resonance....
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His transducer is out of a humidifier and it operates at 48 Khz. It has the driver circuit too. Easy access for mods. I may have to go to walmart. From the looks of things, as I am taking apart one of the two transducers I have - They look like they`re not....
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This circuit has an advantage in that almost all of the energy in the collapsing magnetic field of L2 is transferred to C2. Where as in a normal Joule thief some of this energy is returned to the battery. This is a result of the resistor VR2 preventing rapid....
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The only way to know how fast a particular battery can recharge itself is to put it under load, vary the switching frequencies, on / off times, & then plot the results. A circuit drawing 0. 5 Amps at 12 Volts will charge a battery slowly, so increasing the....
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Generators that does not use fuel to function, these generators give 24hrs of electricity as long as you want to use them. Though in the earlier days of this invention a problem was encountered and this problem is that the battery that powers the generators....
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The circuit uses a total of six, 12 volt lead acid batteries to power the load. 3 batteries are wired in series to create 36 volts. The total discharge current is 30 Amps. 3 batteries are wired in parallel to create 12 volts The total charge current is 10....
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If the total circuit resistance can be reduced significantly to less than 0. 1 Ohm & a load of 0. 4 Ohm or less is connected, over 1 Kilo Watt of free electrical energy can be obtained. There are two discrete voltage regulating stages, one is shown in the....
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The South Africa company, which has developed the 5 kilowatt Fuel Free Generator, has discovered that the batteries` longevity is significantly effected by the process. As far as the choice of batteries to test is concerned, there are many different lead....
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The disk magnets are in attraction on each end of the power coil. The coil is pulse charged, forcing the permenent magnet field to push away from the center of the coil. When the electromagntic field collapses in the coil, the permanent field reforms in the....
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If you do same after W2 will have maximum voltage the released S1 on W2 shortly after short circuit will create BEMF in W2 which is usualy up 20-30 times higher than voltage before. When you learn this method by doing actual testing the similarities will be....
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the dc/dc converter is 110/220->12v not the other way. so the 12V takes the place of the battery, this comes from L4 (what you have marked L3) on t1 there`s really 4 windings, the 4th goes to the top GEN2 (you have 2 gen2`s) The pulse generators are running....
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Emitter voltage completely drops to 0V from 42V during the pulse (transistor conducting or transistor saturated). That in contrary with the pure resistive load (the 4. 7 Ohm resistor in the last video), where the Collector - Emitter voltage NOT completely....
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If your scope probes are not isolated then it's still no problem because you can connect the grounding leads of your probes to point A and the tips of your probes to points B and C. Yes, the resulting current traces will be inverted, but only if you don't....
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If the input is coming from, say, a Function Generator`s typical output clipleads, then the "black" lead or "-" or "ground" is connected to the circuit`s ground. From the Pin 3 of a 555 timer. ditto, the timer`s ground must be common with the circuit`s....
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Tesla radiant energy collectors and the means of creating those apparatus. I have been working on some radiant energy designs myself, having tried the standard rectification bridge for antenna and ground, to using a greinacher voltage quadrupler rectifier,....
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Calculates the difference between the two waveforms to arrive at what he believes is the voltage across the CSR. At the 33Kc or so frequency of the positive going voltage peak (calculated from time interval at FWHM), around 500nHy of inductance in the....
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SM is merely pointing out that the tube is capable of producing those frequencies. he talks about using TV tubes to get a better sound at higher frequencies. anyways it doesnt matter what we think he is saying. just experiment it and see if u get anything....
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Four 4, 8 Volt 2000mA Nickel Cadmium batteries. Does anybody here know a safe way of initial charging those batteries from a lab power supply I do not have a NiCad charger so I need to make one. Any circuit drawings of a simple NiCad charger I will be glad....
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The battery should charge up to 14 volts. A reading of 10. 7 volts indicates that one cell is shorted. A good way to diagnose this further is to look at the water level in the cells. The shorted cell will bubble more vigorously and lose water faster than the....
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This circuit should be the easiest to tune as well (Reason: when the pulse is at 6V, all transistors should be open switch, so logically, there will never be battery shorts). The pulse voltage source V5 can be replaced by a 555 astable circuit. V6 can be....
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This topic will be locked and display all of the circuits and some photos of the devices being worked on in the Joule Thief topic. This is going to take me a while to do so please be patient. If you feel there is an error, or I need to include something else....
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Trying to estimate the pump input energy your circuit needs, let say your average voltage input (waveform D) is around 6V (12Vpp) and let say your average input current (waveform G) is around 1. 5 - 2mA (8mApp) so to maintain the loaded oscillations in L1-L2....
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If the principle of work of the Kapanadze device is the same principle as discovered by Tesla over a hundreds years ago (oscillator-shuttle-circuit) and it is the same principle as described by Bearden thirty years ago (The Secret of Electrical Free Energy)....
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With hv insulation inside ie polystyrene. If you put ferrite in it could be a way to reduce the frequency. But radiant energy won`t like copper. It`ll create a short. Just an opinion, I`ve not experimented with it - except I know ordinary cable won`t work.....
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The 22 turn coil is on top of the 84 turn coil. It makes a difference having this coil connected. I have tried with a 1kw heater and worked better but if I leave it on for too long I am sure it will blow it too. The wire in the heater normaly is not as....
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Have a proper look at the Kapanadze video in the transparent box and see that the vertical coil has copper tape windings on it resulting a capacitor that captures the environment particles with the help of the high voltage. I have done some experiments with....
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It should be painfully obvious that the positioning of a coil by a millimeter one way or the other could decide success or failure. and when you`ve got 10s of millimeters as a possible position, the chances for INCORRECT positioning, and thus FAILURE, are....
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Great idea to remove the core of the HV-transformer, that increases the frequency and the step up rate still seems to be good enough. Do you hear any singing or screeching when your circuit is on I also saw that the spiral type CFLs are specially good for....
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Before one magnet was 2x2x3 cm, now it is a round one 1. 5 x 2 cm only. This makes a huge difference, the motor can be run on1 V and 0. 1 A that makes 0. 1 W. you will find a lot of info, and cut time on your project, these two university students have done....
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Installing a small dash mounted 2 speed fan in my motorhome. What`s the best way Use your 1 channel and then find a relay or use the 4 channel and use the seperate wires [1 low spd. &1 high spd ] Any other lideas Would it hurt the unit if it were placed in....
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This is one of the original brand-name folders created for the site, and for almost three years it has been empty, just someone`s distant memory - suddenly we have a nice pic and the circuit of the preamp. Thanks Richard. I`ve only a pre amp cct I traced....
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The XLR or Cannon-type connector is clearly a better audio connector than a 6. 5mm jack plug and socket, but tradition makes the 6. 5mm socket mandatory despite its serious connection problems. Inputs range from a single socket connected directly to the grid....
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After some years i started using the NMS8280 again for HAM radio purpose. When sending a signal in the air, radio amateurs should always identify by giving their callsign, this is also the case for sending a video signal. I wrote a program using the WBASS....
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The photo depicts a completed (bread-barded) locked anti-phase motor controller using general purpose transistors, which allows you to control small DC motors for robotics applications. The big picture problem is that a normal DC motor controller does not....
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Open Loop Speed Control of a DC Motor via 8255 Digital I/O Controller chip using TCP/IP Server-Client Application Programmed in Visual Basic. The 8bit DAC0832 chip is used as the Digital to Analog Converter. In this project open loop control of a DC motor....
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This section gives step-by-step instructions along with photos to the construction of IR Proximity Switch. Because this is a very simple circuit, only a schematic for the sensor is shown here: (For the PDF format click here. ) This tutorial`s objective was....
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This section gives step-by-step instructions along with photos to the construction of Ultrasonic Proximity Receiver. Because this is a very simple circuit, only a schematic for the sensor is shown here: (For the PDF format click here. ) This tutorial`s....
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This section gives step-by-step instructions along with photos to the construction of Ultrasonic Proximity Transmitter. Because this is a very simple circuit, only a schematic for the sensor is shown here: (For the PDF format click here. ) This tutorial`s....