Popular Circuits Page 27
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As shown for the lights to remind the circuit. The circuit consists of monostable delay circuit, driving circuit, buzzer, light-emitting diodes and other components. Wherein th..
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The gain of the low-cost IC is internally fixed so that it is not less than 34 dB (50 times). A unique input stage allows input signals to be referenced to ground. The output is automatically self centering to one half the supply voltage. The output is also....
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A. B, C for big power split phase I, A + BC Rang generator phase line, A-A indole path string has a 2H220V/15W bulbs, bulbs recovery as both macro instructions J Sweet World as..
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SO HERE YOU CAN SEE THAT USING ENCODER 4-BIT DATA ISGENERATED AND THIS DATA WILL MODULATED USING RFMODULATE AND TRANSMITTED. ANOTHER SIDE RECEIVER RECEIVES SIGNAL AND DEMODULATE THAN DECODER DECODES THE SIGNAL AND 4-BIT DATA ISAVAILABLE. HERE IS THE PIN....
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This is the circuit diagram of USB powered computer speaker, or it widely known as multimedia speakers for PCs. The circuit has single-chipbased design, low-voltage electrical power supply, compatibility with USB power from computer, simple....
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Here s an amplifier circuit that based on the BUZ11 can be replaced by an IRFZ34N and an ECC83 can be used instead of the ECC88. In that case the anode voltage should be reduced slightly to 155 V. The ECC83 (or its US equivalent the 12AX7) requires 2 ....
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The author's articles of months past focus on the application of 32-bit high-powered processors to amateur robotics and more recently applying CPLD technologies to the same. Continuing on this high-tech trend, this article will cover the concepts and....
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The RF oscillator using the inverter N2 and 10.7Mhz ceramic filter is driving the parallel combination of N4 to N6 through N3.Since these inverters are in parallel the output impedance will be low so that it can directly drive an aerial of 1/4th wavelength.....
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This is a special low voltage version of my audio preamp. T1`s emitter voltage is biased close to half supply voltage (1.5V) to allow for maximum output voltage swing. Both transistors are direct coupled and have closed loop feedback to aid temperature....
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A Peak Detector is any circuit that functions to detect the peak voltage of an incoming waveform. Basically the circuit is used as an Amplitude Modulation [AM] detector, Pulse Amplitude Modulation [PAM] detector or Envelope detector. The particular circuit....
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As shown in the simplified block diagram of the high sensitivity of the alarm circuit, wherein the photoresistor LDR and three ordinary resistor connected. Thus, when the light..
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R2 = (192 x Vout) - 240, where R2 in ohms, Vout is in volts and must be at between 1.2 V and 35 V. Vin should be at least 2.5V greater than Vout. Select a wall adapter with a voltage at least 2.5 V greater than your regulated output at full load. Maximum....
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Rejection Ratio (CMRR) which enables rejection of high frequency common-mode voltage. This will result in the rejection of higher ambient levels of noise from utility lines, industrial equipment, and other radiating sources. The following circuit diagram....
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After casually assembling information about the cracklebox, I finally decided to build one in the spring of 2007. In short, the cracklebox is a solid state op-amp chip that has its inputs and outputs wired in a clever circuit in such a way that facilitates....
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The circuit was designed based on the functionality of an op-amp to create a Wien bridge oscillator to generate sine waves in the frequency range of 15 Hz....
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Using the principle of capacitance between two plates this circuit senses when more than one sheet of paper goes betwee..
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It shows using ICL7106 / ICL7107 chip liquid crystal display circuit. In this circuit, ICL7106 / 7107 is a signal measurement and A / D converter circuit, an analog input signal by detecting it, amplified to the digital display circuit, the result of the....
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As can be seen from the figure, the self-generated bias amplifier tube for each tube separately to reduce the demanding amateur conditions paired amplifiers camp. Pre-alone DC ..
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This wireless transmitter and receiver pair operate at 315Mhz. They can easily fit into a breadboard and work well with microcontrollers to create a very simple wireless data link. Since these are only transmitters, they will only work communicating data....
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Audio amplifier circuit is very suitable for use at home, using a subwoofer speaker, or woofer speaker. Usually, also called home amplifier, audio amplifiers are based on the IC and ic are used still in series with type STK457 STK and besides it also can use....
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Tools that created this is to produce noisy atmosphere. This circuit is quite simple, this circuit controlled by two 555 timer IC is assisted by other discrete component resistors and capacitors. The first 555 timer U2 will generate a tone which can be heard....
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I designed this circuit. It can be connected to an FM tuner to play FM stations on an AM radio...
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Cybernetic Micro Systems` CY545 User Manual (Ch.13) - CY545 Thumbwheel Switch Support. External thumbwheels allow parameters for control functions to be entered manually for stand-alone control....
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The robot consists of modules controlled by a main controller. The main microcontroller is an 18-pin, 8-bit, PIC16F84 Flash microcontroller operating at 4MHz. The microcontroller is programmed in assembly language. The controller is connected via I/O pins to....
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The PBL3717A motor stepper driveris a monolithic IC which controls and drives one phase of a bipolar stepper motor with chopper control of the phase current. Current levels may be selected in three steps by means of two logic inputs which select one of three....
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To calculate the length of the elements of other bands use the above formula. Example 6 meter band (50Mhz): (75/50)*0.96=1.44 meters..
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It is well know that pests like rats, mice etc are repelled by ultrasonic frequency in the range of 30 kHz to 50 kHz. Human beings can't hear these high-frequency sounds. Unfortunately, all pests do not react at the same ultrasonic frequency. While some....
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I need a circuit diagram for electronic ballast (40w,230v) transistor based circuit diagram. What are the steps taken to design a electronic ballast?....
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This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you like and consumes very little power. The mixer is shown with two inputs, but you can add as many as you want by just....
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The idea for this circuit came when the author had problems with the wireless speedometer on his bicycle. Such a device consists of two parts: the cycle computer itself and a transmitter that is mounted on the front fork. A small magnet is attached to the....
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When a GATE signal (between 3V and 15V), the capacitor C5 acts as a differenciator and converts the gate signal into a brief positive pulse (width 10 ms). D1 protects the circuit from negative voltages. The brief pulse created on the rising edge of the GATE....
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The key board here we are interfacing is a matrix keyboard. This key board is designed with a particular rows and columns. These rows and columns are connected to the microcontroller through its ports of the micro controller 8051. We normally use 8*8 matrix....
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The Bray Barometer requires manual calibration for voltage offset and gain. Although practical on the workbench, these devices are most likely mounted in inconvenient locations making secondary adjustment difficult.
The Bray Barometer uses potentiometers....
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Now Look carefully following circuit Diagram & try out the circuit on bread board first. if it is working properly go to making its PCB version. the P....
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The following diagram is a very easy and simple electronic combination lock based on IC LS7220. Component Part List: C1 = 1uF 25V C2 = 220uF 25V R1 = 2.2K Ohm Q1 = 2N3904 / 2N2222 D1 = 1N4148 / 1N4001-1N4007 K1 = 12V SPDT Relay / Any approp....
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This amplifier can amplify to 10dB the RF signal from antenna working as class A and is based on transistor BFQ34 of Philips. The transistor comes in case SOT122A. You may find the BFQ34T in market but better do not use it as it has different characteristics. ..
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This simple DC servo motor circuit design that can be used in various electronic projects. As you can see in the circuit schematic this Dc servo motor driver schematic circuit use just one integrated circuit and other few external electronic components. With....
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This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of solar cells can charge a battery at more than 80 % efficiency provided the available voltage exceeds the fully charged` battery voltage by the drop across one....
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The LTC®2400 is the industrys first No Latency TM ADC
that combines automatic offset and full-scale calibration,
an internal oscillator, a sinc4 digital filter, and serial I/O to
yield a 24-bit ADC with 1.5µVRMS input noise and singleshot
conversion time....
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The circuit is based around the LM324 low power opamp which draws around 3mA of current, so it won`t bother the battery if left connected for extended periods....
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Waveform A is timing diagram that shows A split-phase data signal. It consist of a series of binary digits that occur at a periodic rate. Duration of each bit....
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Need a little help getting this schematic figured out, most of it is understood with the exception of the triangular objects(amps-opamps?) Not sure what those are or how to implement and order them. Here is the diagram thus far(planning to test with a lpf at....
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d 101-2 depend on the TV to supply a wide bandwidth video signal. Most black-and-white TVs from 1954 on contain narrowband IF strips or low-pass filters. A wide passband is a disadvantage, because it picks up the chroma signal. In a black-and-white TV, the....
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What you will be seeing here is a circuit diagram about the electrical wiring diagram of the 1986 Ford Bronco and F-Series Pickup. Please make sure you have read and understand about the electrical wiring diagram shown here first before making any wiring....
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This week I want to share a new favorite chip of mine, the LT1970 power op amp from Linear Technology. This nifty device runs from a 36 V supply and can source or sink 500 mA. That`s not too unusual, but how about programmable current limiting, outputs to....
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That motor is rated for 6W which is 0.5 amps at 12V. I would use a 12V DC power supply rated at 1A or more. Any type will be OK. A plug-in adapter....
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This circuit will operate a car"s headlights for a predetermined time to light up the driveway or path after the driver has left the car. SQl is pushed and Q2 is turned on closing the relay and turning on the car"s headlights. Cl begins to charge through VR1....
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By resistive element as an auxiliary neutral point voltage leakage protection circuit, as shown in FIG. Resistance selection should consider the resistance, power consistency r..
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Display interface uses the ICM7218A/B with an 8048 family microcontroller. The 8-bit data bus (DBO/ DB7-IDO/ID7) transfers control and data information to the 7218 display interface on successive WRITE pulses. The mode input pins on the microcontroller.....
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A stroboscope is an instrument which is used to view the object which is moving rapidly with a periodic motion as if they are at rest. The strobe light flashes at a frequency that synchronizes with the resolution of a wheel or moving object which seems to be....
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Electric motor start-run capacitor instructions: Use of air conditioner compressor motor starting capacitors Use of starting capacitors on electric motors for air conditioning, pumps, etc. Start or Run Capacitor Diagnostic Checks: How to Use a VOM or....
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One of the EL34 output valves had blown, the normally silver coloured getter had turned white completely. When I opened the amp, I noticed the remains of a trimpot, including some melted solder, lying on the bottom cover of the amp. Its value was only just....
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As shown is BA6104 Five-digit LED level meter driver IC basic application circuit if the level is higher than required to display 1V, only 7 feet in the power supply Vcc indire..
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This be power motor controller 12V circuit. with a signal MCU Control be high class voltage , about 3V. It can motor control turn advance or walk go backwards...
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Start to build the circuit as pictured in the schematic. To see the schematic larger, click the little i in the upper right-hand corner of the image....
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The electric fence control circuit is composed of the power supply circuit, high voltage circuit and sound and light alarm circuit, and it is shown in Figure 4-26. Power supply circuit is composed of the power switch S, the power transformer Tl, bridge....
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A reverse polarity protection circuit, similar to that in Figure 2 of SLVA139: Reverse Current/Battery Protection Circuits. Here is my circuit: My case is slightly more complex due to the possible input voltage ranging from 5-40V. Most MOSFETs seem to have a....
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This circuit lights up ten bulbs sequentially, first in one direc- tion and then in the opposite direction, thus presenting a nice visual effect. In this circuit, gates N1 and N2 form an oscillator. The output of this oscillator is used as a clock for BCD....
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Connecting a condenser capsule to the grid of a tube amplifier, in order to build a tube mic. In this part we consider how to connect a capsule with two diaphragms in order to get a multi-pattern mic. First let`s examine the different pickup patterns....
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Welcome folks, today I want post interesting topic about switching power supply circuit diagram for you who want to learn more you can search....
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Here is the project/schematic of LM741 dark sensor relay switch circuit. The circuit will activate the relay switch when there is no light on the surface of LDR....
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Denote cam controller SA 1 contact closure case. M1 is 1. 35kW driving motor, Mz to 4kW pump motor. ..
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utilize RGB LED lightsources, an optical sensor and feedback controller. The aim of using optical feedback is a color stability over temperature, maintaining constant brightness, and controlling any color point or brightness required by the LCDs. Within the....
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The frequency meter can be used to measure the frequency of 10 Hz-60Mhz. The frequency meter has a level of precision or resolution of 10Hz. The frequency meter can be used to measure the frequency of the oscillator, transmitter, frequency generator,....
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Input voltage from aerial voltage DC DC advocate is 12V AC at 800mA accepted and again adapted to DC through a arch rectifier Diode 1A. The voltage achievement of advocate ambit can be adapted in the ambit of 0-1000V DC. This aerial voltage DC DC advocate....
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The circuit described here is for a general purpose device that can control DC devices which draw up to a few amps of current. The circuit may be used in either 12 or 24 Volt systems with only a few minor wiring changes. This device has been used to control....
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The clock, which is made from 25 CD4000 ICs, three 555/556 ICs and a handful of discrete components, includes an alarm and a way of setting the clock that until now I have only seen implemented using microcontrollers. All this makes for a rather involved....
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In ladder logic symbolism, an electromechanical relay coil is shown as a circle, and the contact(s) actuated by the coil as two parallel lines, almost like a capacitor symbol. Given this knowledge, interpret the following ladder logic diagram: How do we know....
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This circuit is used to give out a microphone preamp to a amplifier which will power the signal. The NPN transistors used are ECG123A. This circuit is also a older model to the one that now use IC's, but dont worry this will still work fine...
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A JFET transistor-is used as a high-to-low impedance converter and signal mixer. Input impedance is approximately 50.0 kQ but it can be increased by increasing R5 to R8 as high as 10 . Output is about 2 kQ, but it can be increased or decreased by changing....
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This is a simple design schematic circuit for phase control circuit. The circuit can be used to control the power delivered to an AC load. The phase control circuit can control the AC waveform, cutting the cycle to give full cycle, half cycle, zero cycle, or....
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It`s entirely logical that low-cost miniature microcontrollers have fewer legs` than their bigger brothers and sisters some-times too few. The author has given some consideration to how to economise on pins, making them do the work of several. It occurred....
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This simple Door Chime protects the door and gives a loud Alarm tone when there is an attempt of theft. The circuit is too simple and battery operated. A Normally Closed (NC) reed switch and magnet is used to trigger the circuit. Alarm generator is the....
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Like most other ESCs, this one is built up using N-channel Power MOSFET`s because of their good characteristics (low DS resistance). Since this ESC has no reverse, it is not meant to be used in R/C cars or boats if reversed motor run is needed. It is more....
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Switch-mode driven 1.5V bulbs. This device was designed on request, to control the light intensity of four filament lamps (i.e. a ring illuminator) powered by two AA or AAA batteries, for close-up pictures with a digital camera. Obviously it can be used in....
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C1 is a charge pump capacitor*. This works voltage doubler. When TxD is negative voltage, C1 is charged through D7 from GND. If TxD carries out turn-on, since it will become positive voltage, the voltage charged in C1 is raised. The created high voltage is....
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A PAL color encoder and video summer which requires just composite sync and composite blanking inputs, and a 6-bit binary coded input giving the color information. The inputs are organized as 2 bits per primary color with gamma correction automatically....
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As shown in the figure is a preset outage timer of electric cooker circuit. Time of the timing circuit ranges from 1 hour to 12 hours, which can be regulated by PR.The timing mode is counting typeand control method mode is preset outage timing. The circuit....
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This design note presents a voltage controlled cable equalizer based on the LT1256 video fader. The circuit features ease of adjustment, simplicity and the capability for remote control. The amount of equalization can be adjusted continuously from the....
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Common low-pass filter circuit commonly used low-pass filter circuit is shown. Figure (a) ~ (c) suppress high-frequency interference; Figure (b) of the varistor foot can absorb..
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This is a TMP01 Temperature-to-Frequency Converter circuit. Converting voltage to the frequency domain is another common method of transmitting analog....
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Here is a very low-cost protection circuit to save your electrically operated home appliances, such as TV, DVD player, refrigerator, and other instruments during sudden tripping and resumption of mains supply. Appliances like refrigerators and air....
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Most of the source code of this project its based on my Telecard reader projectof my web site. The components for this project arefew and ordinary, thatmeans low-cost and easy-to-be-found. The "keys" are empty or not telecards (Phone cards. Not cell phone....
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Soil moisture meter circuit is usefull for monitoring the moisture at your plants. An easy circuit and very usefull...
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An analog VU meter is often included in the audio equipment to display signal levels in volume units. Analog VU meters with peak LED Another Thumbnail magnetoelectric VU meter response of a VU meter (black line) compared with the instantaneous input level....
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Build the tiny stripboard relay shield for Arduino. View the circuit diagram and download the software. Control two relays from your PC and use your PC to switch things on and off....