Directory —
Technology —
Blog Details for "Circuit Project Electronic"
Circuit Project ElectronicCircuit Project Electronicpower supply, power amp, Circuit TV, electronic control, battery chart, lighting, basic electronic Articles
Mobile Phone Battery Charger pdf file
2007-08-02 04:41:00 Mobile Phone Battery Charger pdf file battery chargerShare This More About: Mobile , Mobile Phone , File
Circuit TV Sony AE-1B
2007-08-01 20:24:00 Circuit TV Sony AE-1B circuit TVShare This More About: Circuit
Circuit TV Sony AE-1
2007-08-01 20:22:00 Circuit TV Sony AE-1 circuit TVShare This More About: Circuit
Circuit TV Sony BE-2A
2007-08-01 20:19:00 Circuit TV Sony BE-2A circuit TVShare This More About: Circuit
POWER SUPPLY Switching 12V for CAR by SG3525
2007-08-01 16:57:00 Switchmode Preamp Supply For Cars DescriptionThe extreme simplicity of this design is thanks to the circuitry inside the SG3525 controller IC. The two outputs have dual switching transistors, and these can be used to create a full bridge forward converter switchmode supply with the absolute minimum of external parts. As shown in Figure 1, the supply ... More About: Power , Switching regulator , Switching , Witch
LED flasher indicates low-battery condition
2007-08-01 16:48:00 David Johnson, Consultant, Littleton, CO Many portable electronic devices could benefit from a visual indication when their battery requires replacement. Typical low-battery indicators simply turn on an LED when the battery voltage drops below a certain value. Such circuits actually accelerate the battery’s extinction by drawing excessive current. The circuit in Figure 1 draws a mere ... More About: Battery , Condition , Lash , Condi , Indica
Lead Acid battery charger (pdf)
2007-08-01 16:45:00 Lead Acid battery charger The circuit presented here can replenish the charge in a battery within 6-8 hours. It also has a voltage analysing circuit for quick checking of voltage before start of charging, since overcharging may damage the battery, pdf file battery chargerShare This More About: Battery , Charger , Lead , Char
Design Considerations for Battery Charger
2007-08-01 16:43:00 Design Cons iderations for Battery Char ger includes designing the transformer and output filter, selecting the components and implementing constant current / constant voltage control, pdf file battery chargerShare This More About: Design
INVERTER 4W by TL494
2007-08-01 16:15:00 R.E.E.Robinson VK2ILV 7 Roland Ave. Wahroonga 2076 Sydney, N.S.W. AustraliaAn inverter power supply suitable for valve radios is described. This inverter uses a small single sided Printed Circuit Board (PCB). Use the overlay to position the components. Test all the resistors, diodes, transistors, and capacitors before using them. The transformer and Integrated Circuit (IC) are difficult to test, ... More About: Vert
Circuit Calibrated Current For Battery Charger
2007-08-01 07:12:00 Circuit Calibrated Current For Battery Charger . Power Supply Voltage Input Calibrated. battery chargerShare This More About: Circuit , Brat
Circuit Power supply Low Volt Regulator by LM317
2007-08-01 07:05:00 Circuit Power supply Low Volt Regulator by LM317 LM317, Power supply circuitShare This More About: Circuit
Design Considerations for Battery Charger (pdf)
2007-08-01 06:38:00 Design Cons iderations for Battery Char ger includes designing the transformer and output filter, selecting the components and implementing constant current / constant voltage control, battery chargerShare This More About: Design
Bicycle generator system (pdf)
2007-08-01 06:37:00 Bicycle generator system the use of a pedal generator to charge batteries battery chargerShare This More About: System , Generator , Stem , Bicycle
Op amp makes precise 9V-battery splitter
2007-08-01 06:34:00 Alkaline 9V batteries are ideal for many portable, handheld applications, because they have 650 mAhrs of capacity, operate as low as approximately 6V at the end of their ... More About: Battery , Split , Litt , Splitter , Reci
Battery Monitoring By LM324
2007-08-01 06:29:00 Introduction It has been stated in other pages on this website that it is a very good idea to have two separate batteries, one for the drive (weapons and wheels), and one for the radio control receiver and other electronics (see Speed controllers and EMC sections). It is very useful to know the state of charge ... More About: Battery , Light Meter , Monitoring
Solar Cell Phone Battery Charger
2007-08-01 06:21:00 I See to this site, Very good centent battery Charger. Detail:: This little gadget uses a small 3 volt solar cell to charge a 6 volt NiCad battery pack which, in turn, may be used to charge many models of cell phones and other portable devices. The circuit “scavenges” energy from the solar cell ... More About: Phone , Cell Phone , Battery , Solar , Cell
Automatic Trickle Charger
2007-08-01 05:26:00 Here is the schematic for the automatic charger I have been using for my kids’ battery cars. The charger is a small molded unit that probably doesn’t supply more than an amp and this circuit would have trouble with much more. No current limit is provided by this circuit - it relies on the charger ... More About: Automatic , Charger , Char
Circuit TV Panasonics MX-1A (pdf)
2007-08-01 04:52:00 Circuit TV Panasonics MX-1A (pdf) , 21E1R circuit TV, Circuit TV PanasonicsShare This More About: Circuit
48 VOLT PHANTOM POWER SUPPLY By TL783C
2007-07-31 20:50:00 This is a simple 48 V regulated linear power supply design that will provide up to 60 mA of current. This circuit is based on the Texas Instruments TL783C high ... More About: Power , Phantom
40V current source operates from -40 to +85C by LM317
2007-07-31 20:45:00 Wide-output-current-range sources that accommodate a wide supply and temperature range require special consideration. The basic circuit of ( Fig 1) provides IOUT = VREF/RS; typically, VREF is 1.25V for the LM317L family. The LM317LZ is rated for 0 to +125?C; for lower temperature ranges, the LM317LBZ could be used (-40 to +150?C rating), but it ... More About: Current , Source , Rates , Rate
13.8 V - 15 A from a PC Power Supply
2007-07-31 20:39:00 The major disadvantages of usual linear power supplies are high power dissipation, the size and the appropriated weight. When looking for an alternative solution, I decided to use a switch mode power supply (SMPS). The efficiency of such power supplies is around 70 % to 90 % at a power density of 0.2 W / ... More About: Power , Switching regulator
PWM D.C. motor drive Low loss speed control By 4093
2007-07-31 20:34:00 Â Introduction This circuit is a very compact switching regulator for small DC motors. I use it for my small printed circuit board drill (18 Volt, 1.5 Amp), but it is suitable for many other applications (e.g. 12V DC halogen dimmer). Circuit description R1, R2, C1, D1, D2 and schmitt trigger IC1B build a 1kHz oscillator with adjustable duty cycle. The output of the oscillator passes through buffer IC1B/C/D which drives power mosfet T1. When T1 is switched on, a current will flow from the +Vmotor supply via the motor and T1. When T1 is switched off, the motor current is interrupted; because the motor acts as an inductor, it will try to maintain its current, which can flow through freewheel diode D3. The avarage current through the motor depends on the duty cycle of the oscillator. The circuit losses are very low, for my 1.5 Amp drill, no heatsink is required for T1. 4093, Electronic Control , Motor ControlShare This More About: Drive , Loss , Speed
Check the milli-Ampere-hour capacitance of your rechargeable NiCad batterie
2007-07-31 20:28:00 Introduction With this mAh meter you can check the mAh capacitance of your NiCad or NiMH rechargeable batteries Normally the cheaper NiCad AA-type cells have a capacitance of 500-750mAh (NiCAD) the more expensive NiMH AA-cells types are up to 1800mAh. I built this circuit because the capacitance of some of my older NiCad batteries seemed ... More About: Check , Hour , Teri , Erie , Char
Power Supply 0-300V DC Adjustable
2007-07-31 17:36:00 Introduction To prevent my high voltage experiments to go up in smoke completely, I designed a simple circuit which can provide an adjustable voltage source of 0 to 330 Volt.. The supply is short-ciruit proof: the current is limited to about 100mA. Circuit description TR1 is a 1:1 mains transformer; it is included for safety. The mains voltage from TR1 is rectified with bridge D1 (1Amp / 500V) and large elcap C1. T1 is switched as a source follower: the source of T1 will follow the voltage of the wiper of R3. D2 is included to protect the gate of T1; although in theory not necessary I strongly recommend to include it! T2 and shunt resistor R2 build the current limiter. When the output current becomes too high, T2 will discharge the gate of T1. This will prevent the current to become too high. The value of R3 has been determined experimentally; it depends also on the Hfe of T2 so you may need to tune the value of R2. Note that T1 needs a large heatsink: in worst case T1 will dissip... More About: Power , Adjust
4 Level - voltage Detector by LM339
2007-07-30 04:21:00 This circuit can sequentially indicate 4 separate voltage levels. The voltages are determined by the values of resistors R1 through R5 arranged in a simple voltage divider circuit. Source : http://home.cogeco.ca/~rpaisley4/Comparat ors.html LED Display, Light Meter , Lighting, meterShare This More About: Voltage , Volta
Comparator Oscillator Circuit by LM311
2007-07-30 04:18:00 Comparator Oscillator Circuit by LM311 or LM339 Comparators can also be used as oscillators but are not well suited for this type of application. Source : http://home.cogeco.ca/~rpaisley4/Comparat ors.html LED Flasher, meterShare This More About: Compa
LM3914 Voltage Monitor
2007-07-30 03:58:00 Source : http://www.turbokeu.com detail : The LM3914 voltage monitor is also straight forward. As told I use only 6 of the 10 led outputs. A voltage divider on the input (R1-R2) decreases the 7-12V input to about 1.96-3.36V (x0.28). The P1-R4 combination sets the high reference voltage (12/12 of 3.36V, level for 12V readout) ... More About: Lighting , Monitor , Voltage , Volta
Power supply regulator LM2941 fanregulator
2007-07-30 03:54:00 Source : http://www.turbokeu.com Detail : I like to use the LM2941 regulator (about 5 Euro here in Belgium) instead of a cheap LM317 because of the low voltage drop over the regulator, typically 0.2-0.3V (max 0.5V at 1A) as opposed to the 1.5-2.5V dropout voltage of the LM317. With the 12 to 12.xV on ... More About: Power
The Universal Mosfet Amplifier
2007-07-30 03:34:00 The picture above shows a circuit board layout giving every option that the MOSFET amplifier will use. This board could be built very easily using “Manhattan Construction” or “dead bug” style construction. I have also built it on mass produced prototype boards from Tanner Electronics. Radio Shack and others have similar ... More About: Universal , The U , Amplifier , Univers , Mosfet
AGC Amplifier by mosfet
More articles from this author:2007-07-30 03:32:00 This amplifier does not have AGC applied. Two 100K resistors are used to set the gate 2 bias at approximately six volts, bypassed with a .01 decoupling capacitor. This amplifier may have a tendency to oscillate, if so, detune the 455 kHz IF can or add a resistor of 2.2K to 12K across ... More About: Amplifier , Mosfet 1, 2, 3, 4, 5, 6, 7 |
