Pazzy

This is the simple Frequency/Voltage Converter With Sample And Hold Circuit Diagram. U1 is a frequency/voltage converter, feeding sample-and-hold circuit using an LF381. An LF351 provides 10-V M-scale output. The circuit produces 1-V/kHz output. F-V Converter With Sample And Hold Circuit Diagram

RELAY AND MAGNETIC CONTACTOR PEC provisions The term ―controller‖ includes any switch or devices normally used to start and stop by making or breaking the motor circuit current. For portable motor rated at 1/3 horse power or less, the controller shall be permitted to be an attachment to plug or receptacles. Controller designs Each controller shall be capable of starting and stopping the motor it controls Auto transformer shall provide an on and off position, a running position, and at least one starting position. It shall be designed that it cannot rest in the starting position or any position that will render the overload device inoperative The controller shall have a horse power rating not lower than the horse power rating of the motor NEC provisions The National Electrical Code (NEC) defines a controller as a device or group of devices that serve to govern, in some predetermined manner, the electrical power delivered to apparatus to which it is connected. As it is applied to control...

By Karissa Bel Flickr unveiled its completely redesigned iOS and Android apps on Thursday. The apps include faster navigation, a more streamlined design and add support for HD videos. Flickr's refreshed home screen emphasizes sharing and interacting with photos in your feed. The redesigned timeline ditches its past grid layout and instead opts for a clean, single-column feed that displays images one at a time with options to share and comment underneath each photo. The app's navigation is much faster overall than previous versions. The company especially focused on boosting the speed of its search and it shows. Searching for photos is significantly faster in the new app. The company also improved search by incorporating images' metadata into the app, including type of camera, camera settings and location information. Even if you have thousands of photos, our intelligent search engine will help you find what you’re looking for fast," Flickr's vice president, Bernar...

Toshiba 32L2400 – 40L2400 – 48L2400 – DL3245i – L4045i – DL4845i Used ICs: OZ9916 – FSFR1700 - FAN7930 – FSL206MR – RT9108  Audio amplifier schematic SMPS and Back-light inverter schematic Click on the schematics to magnify

This is a Simple Emergency Lamp and Turning Indicator Circuit Diagram .White LEDs are replacing the conventional incandescent and fluorescent bulbs due to their high power efficiency and low operating voltage. These can be utilised optimally for emergency lamp and vehicle turning indication. The circuits for the purpose are given here. Emergency Lamp and Turning Indicator Circuit Diagram fig 1 Fig. 1 shows the circuit of a white-LED based emergency lamp . You can also use arrays of white LEDs as daytime running lamps in automobiles. In the emergency lamp , seven 1.2V AA-size Ni-Cd cells giving 8.4V have been used as the power source. The brightness is controlled by duty-cycle variation of an astable multivibrator working at 1 kHz. The astable multivibrator is built around IC1. Its output is connected to LED-driver transistor T1. Up to six branches of white LEDs can be connected in parallel, with each branch containing two LEDs in series (only three branches are used here). Depending o...

By using a simple visual indicating system, this small transistor tester allows you to run a quick ‘go/non-go’ check on NPN as well as PNP transistors. If the device under test is a working NPN then the green LED (D1) will flash, while the red counterpart will flash for a functional PNP device. However if the transistor is shorted, both LEDs will flash, and an open-circuit device will cause the LEDs to remain off. The circuit is based on just one CD4011B quad NAND gate IC, four passive parts and two LEDs. The fourth gate in the IC is not used and its inputs should be grounded. Alternatively, you may want to connect its inputs and output in parallel with IC1.C to increase its drive power to the transistor test circuit. IC1.A and IC1.B together with R2, R3 and C1 form an oscillator circuit that generates a low-frequency square wave at pin 4. This signal is applied to the emitter of the transistor under test as well as to inverter IC1.C. The inverted signal from IC1.C and the oscillator outp...

Waldman Music - TOURCAB 715D Amplifier Schematic CIRCUIT DIAGRAM [Click on the Diagrams to Magnify]

I will start from saying that the board could be replaced by any Arduino plus some(s) its motor driver shield(s). So why I made it you may ask? Well, while I made this tiny tank-robot model presented on below pictures, I wanted to make at least some things by myself, and decide what I need and how I need it instead of only buying prefabricated stuff. [ ]

This is a simple Project of Water level Sensor and Controller Circuit Diagram. When the water level is low, the probe is out of the water and SCRl is triggered on. It conducts and imposes a heavy load on transformer Tl`s secondary winding.   Water level Sensor and Controller Circuit Diagram That load is reflected back into the primary, gating triac TRl on, which energizes the load. If the load is an electric valve in the water-supply line, it will open and remain open until the water rises and touches the probe; this shorts SCRl`s gate and cathode, thereby turning off the SCRl, which effectively open-circuits the secondary. That open-circuit condition, when reflected back to the primary winding, removes the triac`s trigger signal, thereby turning the water off.

This 12 Volt Battery charger circuit best performance to charger 12 volt battery . Why this charger is best performance because this 12 Volt Battery charger quickly to recharger battery and shuts off at full charge. Initially , charging current is limited 2 A , but you can change for the transistor. As the battery voltage rises , current  to the battery decreases , and when the current has decreases to 150 mA or 0.15 A  this 12 Volt Battery charger switches  to a lower float voltage , which prevents overcharge. See this 12 volt battery charger schematic below : 12 Volt Battery charger Click to view Enlarge The 12 Volt Battery charger can be charger wet  accu and dry accu , and to be make the accu old last longer. The output charger goes to 14.5 Volt. As the battery or accu approaches full charge , the charging current decreases and the output voltage is reduced from 14.5 Volt to about 12.5 volt, terminating the charging.

What is the meaning of the picture above? The above picture is a miniature audio amplifier and very simple. Here I will give an audio amplifier schematic is very simple which only requires a few components only, can be seen under this scheme. See from above scheme may occur to you, certainly cheap enough to make this amplifier and quite easy to make. The above simple audio amplifier circuit using an IC as the main amplifier and accompanied by other components. IC used is S1513, which requires a supply voltage ranging from 1.5 volts to 6 volts. And only 0.1 W output power with 4 ohm impedance. For a list components can be seen below. Part list C1 = 100nF C2 = 100uF C3 = 3n3F C4 = 1uF C5 = 1uF U1 = S1513

This 12 Volt Battery charger circuit best performance to charger 12 volt battery . Why this charger is best performance because this 12 Volt Battery charger quickly to recharger battery and shuts off at full charge. Initially , charging current is limited 2 A , but you can change for the transistor. As the battery voltage rises , current  to the battery decreases , and when the current has decreases to 150 mA or 0.15 A  this 12 Volt Battery charger switches  to a lower float voltage , which prevents overcharge. See this 12 volt battery charger schematic below : 12 Volt Battery charger Click to view Enlarge The 12 Volt Battery charger can be charger wet  accu and dry accu , and to be make the accu old last longer. The output charger goes to 14.5 Volt. As the battery or accu approaches full charge , the charging current decreases and the output voltage is reduced from 14.5 Volt to about 12.5 volt, terminating the charging.

The electronic circuit described in this article's main function remote monitoring of power consumption (over current) in a domestic mains alternating current. This monitoring is necessary in many systems, especially in electronic counters, power supplies, AC, inverters, converters, etc. The operation of the circuit is simple, to be connected to the power grid, and when the circuit detects a consumption in the electric network of more than 5 mA he lights LA1 signal lamp. The device can work with currents of several amperes, it depends on the diode used in D1 and D2. The Ti1 transistor is turned on when the D1 and D2 drop exceeds a certain level. Monitor and Protection Alarm Over Current Circuit Diagram     Fuse F1 must of course be dimensioned to suit the application and current limit circuit. When Ti1 leads the alternating current can flow through the capacitor, and the triac is triggered, so that lights the lamp LA1. The above circuit is a current alarm of some changes, ther...

Sub woofers are popular, with home theater being of the driving forces. However, a nice sub adds considerably to normal hi-fi program material, & so if it is predictable & has nice response characteristics.  all of sub woofers use a immense speaker driver in a immense box, with tuning vents & all the difficulties (& vagaries) that conventional operation entails. By conventional, I mean that the speaker & cabinet are operated as a resonant technique, using the Thistle-Small parameters to get a box which will (if everything works as it ought to) provide excellent performance. Completed Prototype A fast word is warranted here, to let you decide if the speaker you have will actually work in a little sealed enclosure. The EAS principle will permit any driver to extend to twenty Hz or even lower. A lovely fast check is to stick the speaker in a box, and drive it to 100W or so at twenty Hz - you ought to see lots of cone movement, a few things will rattle, but you shou...

FEATURES • Two independent amplifiers with open-loop gain of  90 dB (typical) • Internal DC feedback via 140 kΩ resistor from output to  feedback point • AC characteristics that can be determined externally by  an RC network • Electronic on/off switching with transient suppression for  switch on • Head input at DC ground that eliminates the input  coupling capacitor • Minimum external component requirement • Stability down to a gain of 30 dB • Low input noise • Low distortion • DC input current <2 µA. GENERAL DESCRIPTION The TDA1523 is a playback amplifier for car radio/cassette  players. Circuit diagram: Preamplifier and Equalizer TDA1523 Datasheet for TDA1523:   Download

This is the circuit diagram of Rain and Water Alarm circuit . This circuit generates alarm sound when its sensor is witted by water which make a short circuit (connection) between X and Y. A tone of about 1kHz which can be hear while detecting water, is provided by a stable multivariate from timer IC 555. The sensor when witted by water completes the circuit and causes the 555 oscillate at about 1kHz. It has to placed generating an angle of about 30 – 45 degrees to the ground. This tends to make the rain water to flow over it towards the ground and prevents the alarm from going on because of the stored water on top of the sensor. The metal implemented for making the sensor is required to be aluminum and not copper. This is simply because copper forms a blue oxide on its layer on prolonged exposure to moisture and needs to be cleaned on a regular basis.The aluminum foils may be secured to the wooden / plastic board via epoxy adhesive or small screws. The connection between X and Y fro...

Tone control circuit is used to adjust the tones before entering the amplifier. Tone control over equipped with a loudness and filter directly without using the switch to disconnected or connected. Part of his filter that is C1 and R1 from ground to input , and for his loudness on the R4 and C3 are connected to the input and then go to VR1. C2 and R3 go from ground to the input . After the input is set by volume or VR1 then procesed again by treebel ie C8 , R13 , R14 , and VR2 . Bass on R10 , R11, R12 , C7 ,C8 , and VR3. For supply voltages has been given a stabilization in Q3. See schematic below : Click to view larger Part list : R1 = 100K R2 = 50K trim R3 = 22K R4 = 15K R5 = 1K R6 = 4K7 R7 = 330K R8 = 330K R9 = 3K3 R10= 5K6 R11= 8K2 R12= 5K6 R13= 1K R14= 1K R15= 50K TRIM R16= 50K TRIM R17= 330K R18= 4K7 R19= 47K R20= 1K R21= 4K7 R22= 2K2 R23= 100R R24= 22K C1 = 15n C2 = 15n C3 = 560p C4 = 4u7 C5 = 33u C6 = 4n7 C7 = 39n C8 = 39n C9 = 4u7 C10=4u7 C11=470u C12=100u Q1 = C1815 Q2 = C828...

An unconventional, scalable high efficiency 12V solar power system and battery charge controller with low voltage cutout to protect the battery. (ideal for systems of 50W or less). The most common solar charger consists of a Schottky diode to prevent the battery from draining into the PV panel and a shunt regulator that effectively short circuits the panel once the battery is fully charged. One problem with this approach is diode losses and the resulting heat. If a 50W 12V panel supplies 4A to the battery, the Schottky diode will drop about 0,4V across it dissipating about 1,6W of heat. This requires a heat sink and loses power to heat. The problem is that there is no way of reducing the volt drop, paralleling diodes may share current, but the 0,4V will still be there. The circuit uses a MOSFET in stead of the usual diode and the primary power loss is resistive. [ ]

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