Top Circuits Page 229
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When configured as an input there is a more subtle problem. If the input has its pullup enabled it could affect the circuitry that is expecting to see an A/D input. But if the pullupis not enabled, then when its A/D input is not selected it will be a digital....
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The objective of Linkwitz` article was to reduce distorted spatial reproduction when listening to recorded stereo music with headphones-the "super stereo" effect where the music seems to be coming from inside one`s head. To remove the spatial distortion,....
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Measurement microphones differ from recording microphones and sound meters-they have a flat response, (usually to well below 20 Hz. , and above 20 kHz. , ) and do not have "weighted, " or equalized frequency response. They are also optimized for....
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The first television set I ever saw appeared in our house in about 1950. It looked like this - except it was in a box, obviously. My dad had built it from a kit. They made their own entertainment in those days. There was only one channel - BBC - broadcasting....
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Why would you want to use the Arduino library with another IDE It helps organize your code (especially for large projects), is easier to implement other code not written specifically for Arduino and can be a gateway to more powerful programming tools and....
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The LCD module has built-in fonts and can be used to display text by sending appropriate commands to the display controller, which is called HD44780. Detailed information for using the display is available in its datasheet. A schematic diagram of the LCD....
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The DE2 board provides both USB host and device interfaces using the Philips ISP1362 single-chip USB controller. The host and device controllers are compliant with the Universal Serial Bus Specification Rev. 2. 0, supporting data transfer at full-speed (12....
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The DE2 board provides four pushbutton switches. Each of these switches is debounced using a Schmitt Trigger circuit, as indicated in Figure 1. The four outputs called KEY0, . , KEY3 of the Schmitt Trigger device are connected directly to the Cyclone II....
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The DE2 Board has eight 7-segment displays. These displays are arranged into two pairs and a group of four, with the intent of displaying numbers of various sizes. As indicated in the schematic in Figure 1, the seven segments are connected to pins on the....
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The DE2 board is equipped with an Analog Devices ADV7181 TV decoder chip. The ADV7181 is an integrated video decoder that automatically detects and converts a standard analog baseband television signal (NTSC, PAL, and SECAM) into 4:2:2 component video data....
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The above circuit is a fluid level meter that converts the level in the container on the left into a single-digit number, from 0-9 on a seven-segment display. In this case, 0 (zero) represents the lowest level, and 9 (nine) is the highest level. When in the....
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This manual is applicable to all integral horsepower DC motor controls of this series from 40 HPto 300 HP. The integrated circuit regulator selection of these DC motor controls are modular inconstruction, affording a minimum of down time in the event of a....
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The 100W4 is a two tube medium frequency transmitter with provision for pre-tuning to three frequencies in MF band and for type A1, A2 and A3 emission. For type A1 the two tubes operate as parallel oscillators and for A2 and A3, looking at the set from the....
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The line is purposefully not straight, to see how it would do with zig-zags and splits, as are normal for the Chibots advanced line-following contest. The AVRcam is a small, real-time image processing engine capable of tracking colorful objects. The system....
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Build this circuit in any way you want, keep in mind that there is high voltage involved, make sure that everything is properly insulated and that bare conductors are not closer to eachother than 2mm to prevent any arcing. This circuit is basically a voltage....
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The best way to get a sense for space-charge tubes is to study some real circuits. Look at the online circuits listed below, and see if you (or one of your friends) have any of the older print articles listed after the online articles. That done, choose a....
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The Sound Blaster MIDI port uses two pins from the 15 pin joystick port. These normally would be redundant +5 volt and ground lines. In the Sound Blaster, there are called MIDI TXD (Transmit eXternal Data) and MIDI RXD (Receive eXternal Data). The signals to....
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This is my first AVR-project on this page. The DiSEqC-Tester allows to test DiSEqC-switches that uses 1. 0 or 1. 1 protocols. (DiSEqC-Switches with 2. 0 and 2. 1 protocol have backwards compatibility with 1. 0 & 1. 1 respectively and also may be tested). The....
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A Norcold DE560 that was working fine until I turned it on this year. It`s in a boat and when I turne the refrig breaker on it, it pops immediately. is there a fuse or something on the fridge I can check Ok the only thing that will cause the circuit breaker....
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A warm weather problem with 2003 Audi A6 2. 7T. When the car sits in the sun the radio loses reception for about 10 minutes until the inside cools down (appears correlated). I also have noticed that intermittently my reverse sensor horn is not beeping (not....
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Im wiring up my 1964 xm and not sure where the wires go for the temp gauge on the back of the gauge theres an I S A the wore are Green/Black Red/White Yellow/Blue do you have any idea Thanks Haydon Ask-a-doc Web sites: If you`ve got a quick question, you can....
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A Polaris Jet Ski Model SLTX 1050 3 cylinder, 1998 year. Unit was running when it blew piston. I removed engine and rebuilt and put back together only now it will not start - can not get it to spark. ` I followed the manual` on disassembly and re-assembly, I....
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1999 Buick Regal. Instrument panel lights have failed. Examined fuses related and even those not related to lighting and have found no bad fuses. Is there a CB behind the headlight/interior light switch that can be reset. What I would do first is turn on the....
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Interior lights come on when I enter the car, and most of the time do not go out while driving. Once I park the car and remove the key, the lights will go off like they are supposed to. how do fix this problem in an otherwise fabulous car When you get out....
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This line provides ground to that relay and is N-O when CU is OFF, and is N-C for all other control functions. The Off switch on the CU is "sticky" as I mentioned before. Several questions: 1) Can I substitute AC Delco CU p/n 15-71886 or p/n 15-71932 for p/n....
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In this diagram, look to see if you have battery voltage at these points. You don`t have to check every point, just enough of them to confirm that all points have power. Let me know and I`ll bring you to the next level after you report back. Ok Dave, fuses....
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A 1989 buick electra park avenue with a battery drainage problem. I think i have located the culprit but not the exact source. When the engine is off after running awhile, what i think is a compressor of sorts is engaging. It runs for 5 to 7 second....
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A 99 nissan sentra 1. 6 I recently put a new motor in and I have no power to my coil. I have changed all sensors back to my origanal. I do have ignition power and power to the crank sensor. It sounds like there is an open circuit from the ignition switch to....
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I would start by making certain that no light bulbs on the vehicle are burnt out, particularly the turn signal lights, brake lights and dashboard indicator lights. Funny things happen when bulbs are burnt out. It sounds like you know your way around a meter,....
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There is only one circuit breaker (no fuses) for the system. If you can follow the schematic, it shows that the switches are used to supply Power (12 volts) and Groundto the window motors in opposite polarities to make the windows go up and down. So we will....
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A 2000 GMC Yukon Denali that is intermittently losing power to the radio, power windows and wipers. I know these are all fed from the RAP relay but I find it hard to believe the relay could be failing at such random intervals with no apparent pattern. Could....
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Got a 89 s10, 4. 3 with auto trans. someone else pulled the motor I got stuck trying to put it back together. Only problem I have is the starter wiring. Solanoid has one big terminal(goes to hot side of the batt) and one small one with a "S" which I figure....
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A 2001 cavelier. the other day one of my low beam headlights quit, i replaced the balb it still doesnt work. when i pull it into gear the daytime driving lights flash a bunch of times then go off and the service light is on. i have check the wires under the....
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A 2001 monte carlo. the only thing that will work is the lights. no radio no wipers noturn signals, none of the dash lights will come on when you turn the key on, i was told that my computer systym was out of sync. how would you go about resetting this....
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About when the headlights go off Is it a random times Only when the car is moving Do they come on normally when the switch is used to turn them on OK. The first thing I see that would be suspect would be the Headlamp Relay. When relays start to fail, they....
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1999 suburban, head lights do not work. checked fuses and circuit breakers, they are fine. In the owners manual it says headlamps are protected by a circuit breaker in the lamp switch, but of course it does not bother to tell you where to find it Hmm. That`s....
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A 2004 Chevy Tahoe that totally lost power. I was driving at 60 mph and watched my tachometer drop to nothing. It has been in the shop for three days now, and they are having trouble figuring out what is wrong. They have tried a couple things but the engine....
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A 2002 blazer and I ran the codes on it and it came up po 155 and po 756 which a 02 sensor heater circuit malfunction and ashift solenoid b ckt performance of stuck off. What is that and what will it cause. The blazer has power when it first starts then when....
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1999 S10 2. 2L Fuse Box Quesion. There are two (what appear to be) main power terminals on the top left and top right on the Fuse Box. Which terminal is the full time power terminal and which is the RUN power terminal Vehicle was a basket case and I am....
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The longer the locks are not used with either the remote or central lock button, the stronger the power surge to the door lock motors. After being "activated" even once, it is like it drains all the power out of the capacitor or whatever stores the charge if....
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2001 chevy s10 headlights some times work some times dont along with dash indicator light. all other lights work fine. I have changed headlight switch, fuse, relay. checked headlight bulbs. all wires to bulbs are possitive. Yes, I took test lamp and hooked....
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The schematic shows these a regular light bulbs, so there is the chance that the bulbs are burned out. I don`t know at this point if the bulbcan be easily replaced. I did some more checking and it does look like the bulbs in the HVAC control can be replaced,....
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the left side works fine and i`ve got the left side running lights and brake light to work but not the turn signal I am wiring it right into the harness` and do not want to have to buy the plug in harnes as i need it done asap Ask-a-doc Web sites: If you`ve....
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When the weather is hot with the sun beating down the car won`t start and radio, keyless entry, power windows, power locks, radio, and power seat wont work. After the sun sets everything functions again. Have you checked to see if the headlights function....
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What I would do is switch the headlight switch ON & OFF and them see if you can "feel & hear" the headlight relay clicking. This is shown in the first schematic, on the left of the diagram. The triangle at the bottom left leads to the two 15 amp fuses you....
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A 2003 Monte CarloSS, I am having trouble with low idling, it cuts off while driving or when in park. It also has no dash lights and no one can seem to understand why, one day they worked and then they didn`t occasionally will come on for a second or two....
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Need to know where is the phisical location of the compressor relay. Also do you know how to test the pressure sensor on the plastic tank on the compressor assembly itself Sorry to take so long to get back with you. I have not been able to nail down the....
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A 1998 tracker it has 1. 6 multifuel port injection system. The vehical is hard to start. when we drive it their is a lack of power it wants to bog down. we have replaced plugs, cap, rotor check catlic ok. disconected the tps still runs the same. could this....
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1995 camaro, just swapped the engine/ trans with cradle from a 1994. I didn`t take off any plugs from the engine and kept the computer mouted on pass. wheel well with the engine. swapped the v. a. t. s box and steering column. turns over and get spark, but....
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2004 chev impala - unable to find the fuse for the rear defogger. I find the relay but both manual and actaul car diagram and passenger side fuse block show 30amp fuse - but nothing is there. Thanks, I check that fuse and it is OK. I see there is a circuit....
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A 1971 lincoln continental 4dr, i am getting no power inside the car mainly ignition switch, i checked battery cables, post connectors, and fusible link by battery all check out good. all fuses in fuse box good. not sure about the circuit breakers though i....
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A 12v DC electromagnetic lock with push to lock and push to unlock using my existing LED indicator/switch. The switch should indicate green when unlocked and red when locked. The LED indicator/switch is SD-7175SGEX1Q from It is momentary contact and is....
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Burned out some resistors on the circuit board of my Roland KC-300 amp and they are so black that I can`t tell what they are. What kind of resistor is R82, R83, R85, R92, and R93 If R92 and 93 continue to get really hot. you may have something pulling too....
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Basically, you would need a regulator circuitry. Since this involves DIY (do-it-yourself) project, it is required to be familiar with electronic components & circuitry, use of a multitester and a soldering iron. The schematic diagram below would take in any....
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Why do I need C1 What does it do I don`t understand their role in the circuit. Why do I need C4 and C5 I don`t understand their role in the circuit c) why doe I need R6 and R8. As for those caps on the power rail, they clean up the signal to make it less....
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A 1995 Ford Escort wagon with a 1. 9 litre engine and 5 speed manual trans. The problem I`m having is that the cooling fan won`t come on by itself when the temp gets high. I`ve had a friend help me test the fan, and when current is put to it directly, it....
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Have a 2003 Ford Crown Vic (Police), Have 3 problems First on Acceleration (hot) sometimes instrument cluster only has it`s back lighting go off and on. Second on Acceleration (hot) sometimes you hear a relay under left side of dash click and all back....
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An flashing airbag diagnostic code of 51 flashing on a 1994 Ford F150, and I need to understand what this could mean. The probem started about one month ago. I also had a leaky windsheild, so I am also wonder if that could affect the airbag module as well.....
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The wiring diagram for the clock and radio screen illumination for a 1999 mercury sable with a 3. 0L vin U. I have searched for hours on alldata and MichellOnDemand and have found absolutely nothing. Please help! I don`t know if it matters, but the vehicle....
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A 1984 F-350 crew cab w/a 460. My fuel gage does not work and it will not pump from the front tank, were do I start I have replaced the switch in the dash and the switch on the frame. I just turned it on and did not hear anything. The pigtail that goes into....
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Ford Thunderbird 1997 - Turned blower/fan on for air conditioning heard a snap under instrument panel - no air/blow for a/c, heater or defrost. Checked blade fuse ok. Could my blower switch be bad, or inline fuse or bad resistor You will have to check all....
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A 96 ford explorer. My headlights do not work. I have low lights and interior lights. I have changed the bulbs, checked the fuses, relays and light switch and they still don`t work. Any suggestins or am Imissing something Ask-a-doc Web sites: If you`ve got a....
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after it sets for awhile it runs for a couple seconds you can see injectors pulse then shuts off and no injector pulse does have fire and feul pressure have rebuilt distributor and replaced eec. You need to verify you are getting spark when you loose....
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A 1996 Ford Windstar and the connector at the bottom of the console between the bucket seats reads 6 volts (VOM) and not the 12 volts expected from a cigarette/accessory connector. The 6 Volts is solid and 2 cigarette lighter connectors are available the....
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My 2007 Mustang convert. top won`t go down. Started down, got to about 6" open then stopped. It will engage to go back up, but won`t go down. Have checked all fuses, OK. When I press the down switch I can hear the top motor running. It indicates a mechanical....
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2003 Chevy Silverado K1500 Ext Cab 5. 3l V8 DTC codes P0740, P0753, P0758, P0785, P1860. I have 11. 73v at IGN 0. I have replaced the Ignition. I have removed an aftermarket Prolock security system. I have disconnected the wireing harness from the pass side....
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Here is the fuse block diagram, with the Aux Pwr fuse highlighted. I would check both sides of the fuse with a test light or multimeter to make sure it is working at that point. I am assuming that you have checked for power at the Aux Power socket - center....
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Turn signals work, hazard lights work, stop lights work, head lights work. Tail lights don`t work with the headlights. I looked at the bulbs and they appeared fine. I switched the taillight bulb with the turn signal bulb and it work in the turn signal spot.....
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2003 GMC Savana Instrument cluster illumination lights and climate control cluster lights out. Cluster diagnostic lights good and come on ignition start up. Radio lights good and do dim with lights dimmer. Instrument lights fuse under hood good. Cluster was....
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1995 GMC Serria the ABS light comes on and all hell brakes loose, thrans shifts into limp mode, rpm shoots everywhere, speedo does not work. figured it might be the front wheel sensors I don`t think it`s the wheel speed sensors. It sounds like you`re losing....
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A 315bl excavator. Engine intermittently shut off on its own, but will start back up without a problem. Now machine will not shut off when key is off, happens every day now. I sometimes have to choke off air intake to shut down. most of the time the engine....
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The excavator is Mitsubishi MS280. The problem is they are not sure how to excite the pump, I want to put an electronic proportional control valve in the old girl. If your familiar with this era of Mitsubishi`s could you let me know and I will give you as....
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Repair a Samsung SCR-3000 DVR COMBO for my security system. I`ve replaced 3 capacitors which were obviously blown, and see only one resistor (adjacent to the transformer) that is scorched. Problem is I can`t read the bands and hope someone can tell me the....
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All of the above would be internal hardware issuesa. Still, there is a possible fix; though not quick-n-easy and neither is there a workaround. The unit would have to be opened up for visual inspection, voltage measurements, confirm fault and effect repairs.....
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If you ground the blue wire at the headlamp switch and the lights come on the switch is bad. I know you have already checked continuity of the switch though. If I recall the relay has 2 small terminals and 2 larger ones. The one smaller one should that has....
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A 1991 350SDL that has the center vent not blowing air issue. However, When I get on it and the revs go high, air does move from the defrost vents to the center vents. Does that mean that the actuators are ok and I have a leak somewhere else or does that....
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A 2008 USA Nissan Pathfinder (5N1AR18B28C628086). I live in Toronto, Ontario Canada. One of the many feature my pathfinder has is a power assisted mechanism to close the lift gate (trunk, rear door). About 2 moths ago the above noted mechanisms stop....
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A 1994 Pontiac Transport. the front wipers only work on high. Someone said I need a wiper motor and someone else says I need a wiper pulse module. Where is the wiper pulse module located the pulse module, or sometimes referred to as the control module, is....
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A 1999 Pontiac Montana. The information console that shows temperature, MPG, compass, etc. failed off and on for a few days before finally dying. At the same time, the radio display failed. The radio works just fine. The display can be read if you shine a....
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It is best to remove the glass from the regulator so that you can move the regulator freely then attach the glass after you install the motor. Once you have the motor installed operate the regulator with the motor to position the glass attachment points....
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A 1990 Toyota Camry LE station wagon & trying to install a replacement power antenna. I have removed the OEM antenna (no easy task), but now trying to figure out how my replacement model that only has 2 wires (red & green) is suppose to connect with my....
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