These are a whole bunch of things to make with the timer IC with a note for each picture. I do not take credit for these schematics, they were made by Collin Mitchel. As you would probably think it took me a very long time to make this but it was night and i was wanting to waste some time so i hope you like it! I have descriptions for each and every picture so feel free to ask questions! Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson.
This is not an instructable, as the author say it's only wasted time. Question 1 year ago. Can any one explain the working of traffic light with two based on mode of operation of Answer 1 year ago. When the Red LED times out pin 3 goes high which allows right to start timing by first pulling pin 7 momentarily low normally to discharge a timing cap which causes the Orange LED to light followed by pin 3 going high turning Green LED On Until the right times out Green goes off as pin 3 goes low and the Orange LED goes on as pin 7 low goes to discharge.
Question 2 years ago on Introduction. Can I get all 54 circuits to build?. Warren section juno. Reply 2 years ago. Reply 7 years ago on Introduction. Colin, I recognized your drawings immediately and wanted to point out this author's source from which the drawings were shamelessly copied, then saw that you already did, and it seems that nobody cares Reply 3 years ago.
Reply 6 years ago on Introduction. Thanks Colin, Awesome designs you have here!!!!
The is still one of the most widely used I. Colin55 My name is Mike I have a question or a favor for you maybe you can help me. Thanks in Advance I am in the process of making a board game called shut the box it's a dice board game. I'm sure you have heard of it for my daughter.
Instead of flipping wooden numbers I would like to use some type of ic numbers that are fixed so all I have to do is push a button coresponing to the specific number to turn it on or off if you look at google images under shut the box to get a better idea of what im talking about. Sir i need some helpful material for music box.
Kindly provide how it works?? Message to all future subscribers: this site is a shameless copy of Colin Mitchell's work, and lets you pay for something thats available for free at Colin Michell's 'Talking Electronics'.
74LS Series Digital Logic Tester
So don't bother subscribing here! Introduction: 47 Projects to Do With a ! By Jimmy Proton Follow. More by the author:. Add Teacher Note. Did you make this project? Share it with us!Its name is derived from three 5K ohm resistors ,connected in series used in it. It is a affordable, stable and user friendly IC in application such as monostable and bi stable. Here is the list of 40 timer circuits that can help you in understanding timer functions. First five circuits explains about timer and its different modes.
Super sensitive intruder Alarm : This circuit shows an intruder alarm using timer. The simple circuit shown here will produce an alarm when any intruder is detected. Intruder is detected using an op-amp.
This circuit produces a continuous signals that confuses the TV remote. Thus the TV signals were jammed. This circuit can be used as a door bell. Police Lights using Timer : The circuit shown here simulates the police car lights. This flashing is performed continuously. Bike Turning Signal Circuit : Here is the circuit showing bike turning signal.
It is operated in astable mode. Automatic Changeover Switch : The change over switch can act as an inverter. Reverse Parking Sensor Circuit : Reverse parking sensor circuit helps the driver in parking the vehicle safely.
This circuit indicates the distance using three LEDs. It can output a current of mA. This can drive a small loud speaker. Here in this circuit there are 5 push button. Pressing them in a order will produce music similar to a piano. Digital Stopwatch Circuit : The digital sop watch shown here will count 60 seconds. This works on the principle of two stage counter. The timer here is used for producing the clock pulses.
These clock pulses were given to the counter circuits for counting purpose. The LED cube here is controlled a timer.Fun with 1.1GHz Potato chips
Air Flow Detector Circuit : A simple air flow detector is designed here. Air flow detection is used in many applications like to check the amount of fuel to be added to an engine or to measure the contamination etc.What makes it special is that it sits on a very neat set of PCBs, and due to its use of 74AC series logic it can run at much higher speeds than the original.
A 20 MHz would have been revolutionary in the mids. Through a flying ribbon cable, it can plug directly into the socket on classic microcomputers, and the website shows it running a variety of software on a Commodore VIC There is also a custom SBC as part of the suite, so no need for a classic micro if you want to put the CPU through its paces. The boards are not quite perfect, the website has a picture of some very neat reworking where it appears that a bus has been applied to a chip in reverse, but it certainly has the feel of a professional design about it.
Pardon my French but that is fscking gorgeous! Great job. Looks neat, can probably be done by anyone with a steady hand, looks week documented. They are talented and dedicated, much more than me If you want more information on vic 20 or commadore 64 there is only one man to ask a Mr Ralph Down ,his is the GURU who took this toy past all its design limitations to outperform all specsSorry got no address,try the net!
Ralph died a few years ago. He was indeed the man who knew the Commodore 64 better than anyone. I am not worthy!!! I had both the Vic and commodore 64 in those early days. Other than the challenge why? The challenge by itself makes it worth it to some. The Why? Putting jig saw puzzles together is a leisure time activity for many, for others projects like these are leisure time activities. Yes it is an emotional roller coaster, from this is amazing project to why and the heck spend time resources on this.
I was just plain amazed. The why, is that the true reward in many things, is the journey you take, to complete the project. You learn a lot of stuff along the way, you can use on other projects.
Arduino Projects: Digital IC Tester With Embedded Truth Table
Things you never understood or considered, buy just buying pre-built stuff off the shelf. Icing would be to optimize for speed, or schematic area, chip count, or BoM cost. First was made with NMOS logic which was lower power, higher integration but slower than contemporary bipolar chips as 74xx, 74Sxx, 74LSxx.
An implementation with 74LSxx chips would be interesting, comparing the speed and power draw of contemporary technologies.
Perhaps compare it with 74S or 74AS or even 74Fas the faster contemporary branches of the family. IDK why, just seems like an 8 core SoC would be fun to fool with. Because a modern CPU implemented in logic chips would be pretty close to impossible! And since modern chips still work via the same fundamental principles that means a greater understanding of those too!
This site uses Akismet to reduce spam. Learn how your comment data is processed. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies.The 74xx series of integrated circuits ICalso known as monolithic IC, use very specific meanings for their letter designations.
The lettering scheme provides engineers with a quick means to determine their compatibility with any project circuit. As semiconductor technology improved, manufacturers improved the IC, and consequently, many of the older integrated circuits are no longer available. Hence, the good news is that you will not have to be familiar will all the letterings.
This chart shows two main divisions based on operating voltage. Those integrated circuits based on CMOS technology will operate at 3. For example, the "AC" version will operate at both 3.
This chart shows the operating voltage range of the integrated circuits. It is interesting to note that the low voltage LV chips will operate at extremely low voltages down to 0. It can operate at 5 V. The same series listed in the 3. The family of integrated circuits was huge at one time and in the order of thousands. Besides logic gates, there was an IC for almost every function such as, line drivers, registers, exotic counters, and processors.
Many of the early Intel microprocessors consisted of discrete integrated circuits hence there were adders, and registers, and bus controllers. However today, many of these are obsolete. Apart from the very basic logic gates, and counters, many ICs are unobtainable today. With my anorak on, I usually travel the world in search of a vintage chip, and I have the complete collection of vintage monolithic ICs, including some of the early vintage ones by Texas Instruments, and Fairchild Semiconductors.
Motorola joined shortly afterwards, and I have the complete collection of their chips as well. Operating Voltage Range Vcc. Raspberry Pi Projects Donate. Author: Peter J.For each IC there is a diagram showing the pin arrangement and brief notes explain the function of the pins where necessary.
The notes also explain if the IC's properties differ substantially from the standard characteristics listed below. If you are using another reference please be aware that there is some variation in the terms used to describe input pins.
I have tried to be logically consistent so the term I have used describes the pin's function when high true. For example 'disable clock' on the is often labelled 'clock enable' but this can be confusing because it enables the clock when low false.
An input described as 'active low' is like this, it performs its function when low. Touching a pin while charged with static electricity from your clothes for example may damage the IC! In fact most ICs in regular use are quite tolerant and earthing your hands by touching a metal water pipe or window frame before handling them will be adequate.
It is best to build a circuit using just one logic family, but if necessary the different families may be mixed providing the power supply is suitable for all of them.
For example mixing and 74HC requires the power supply to be in the range 3 to 6V. A 74LS output cannot reliably drive a or 74HC input unless a 'pull-up' resistor of 2. Driving or 74HC inputs from a 74LS output using a pull-up resistor. The has Schmitt trigger inputs to provide good noise immunity. They are ideal for slowly changing or noisy signals. The hysteresis is about 0. This gate has a propagation time which is about 10 times longer than normal so it is not suitable for high speed circuits.
The gate output is sufficient to drive four 74LS inputs. The count advances as the clock input becomes high on the rising-edge. Each output Q0-Q9 goes high in turn as counting advances. The reset input should be low 0V for normal operation counting When high it resets the count to zero Q0 high.
Counting to less than 9 is achieved by connecting the relevant output Q0-Q9 to reset, for example to count 0,1,2,3 connect Q4 to reset. The disable input should be low 0V for normal operation. When high it disables counting so that clock pulses are ignored and the count is kept constant.
It can be used to drive the clock input of another to count the tens. The outputs a-g go high to light the appropriate segments of a common-cathode 7-segment display as the count advances.
The maximum output current is about 1mA with a 4. The table below shows the segment sequence in detail. When high it resets the count to zero. The disable clock input should be low 0V for normal operation.
When low it makes outputs a-g low, giving a blank display. The enable out follows this input but with a brief delay. It can be used to drive the clock input of another to provide multi-digit counting. The is a synchronous counter so its outputs change precisely together on each clock pulse. This is helpful if you need to connect the outputs to logic gates because it avoids the glitches which occur with ripple counters.The series logic TTL chips spawned a series of other derivative logic families offering slightly different characteristics: high speed, low power, etc.
However the standard parameters remained the same: logic function a and a 74LS16 had the same function; they were pin compatible, etc. The series TTL chips remained in use for many years. They have long been superseded by other 74xx00 logic families, but they have been so successful that the basic concept has remained the same. Some of the main or highlight features and specifications for the series logic family are detailed below:. The logic series of ICs were fabricated using bipolar transistor technology and this gave its name to the logic technology, TTL standing for transistor-transistor logic.
The series TTL ran from a nominal 5 Volt supply line and as a result of its popularity the 5 V line became standard for logic chips for many years, only changing when power restrictions and smaller feature sizes on chips as a result of higher integration and new processes forced the operating voltage down.
Although launched in the mids the series became the main standard set of logic widely used in electronic digital circuits. There were earlier TTL series of chips. With their increasing popularity, the cost of the chips came down. Initial offerings cost many dollars each, but over time as production techniques matured and quantities rose vastly, some series chips could be bought for a few cents each. From the circuit diagram the basic blocks of this simple series IC can be easily seen.
The input stage of the NAND gate is a multi-emitter transistor. This takes the inputs and provides the required logic. The next stage provides the required phase and drive for the final stage which is the standard totem pole output. It comprises two transistors and enables very fast switching times to be achieved. In this arrangement either Q1 or Q2 conducts dependent upon the complementary logic status of the inputs. The diode D1 ensures that Q2 is able to turn off rapidly when required.
In this way external loads can be connected between the output, i. This has many applications including driving indicator lamps. However the speed of switching is much slower and dependent upon external influences. It is able to provide the high and low of a normal output. It is also possible to disable the output so it has no effect on the line being driven - in this state it is open circuit or floating.
In order to be able to select this state, an additional "enable" input is required on the chip. To achieve the tri-state situation, the internal circuitry is arranged so that both transistors in the totem-pole output can be tuned off at the same time.
Supplier Directory For everything from distribution to test equipment, components and more, our directory covers it. Selected Video What is a Spectrum Analyzer? Featured articles.The following is a list of series digital logic integrated circuits. The original series integrated circuits were made by Texas Instruments with the prefix "SN" to create the name SN74xx. Due to the popularity of these parts, other manufacturers released pin-to-pin compatible logic devices which kept the sequence number as an aid to identification of compatible parts.
However, different manufacturers use different prefixes or no prefix at all.
Some TTL logic parts were made with an extended military-specification temperature range. These parts are prefixed with 54 instead of 74 in the part number . A short-lived 64 prefix on Texas Instruments parts indicated an industrial temperature range; this prefix had been dropped from the TI literature by Surface mount parts with a single gate often in a 5-pin or 6-pin package are prefixed with G instead of Some manufacturers released some series equivalent CMOS circuits with a 74 prefix, for example the 74HC  was a replacement for the with slightly different electrical characteristics different power supply voltage ratings, higher frequency capabilities, lower "on" resistances in analog switches, etc.
See List of series integrated circuits. Conversely, the series has "borrowed" from the series - such as the CD and CD being pin-for-pin functional replacements for 74C and 74C A few alphabetic characters to designate a specific logic subfamily may immediately follow the 74 or 54 in the part number, e.
Not all functions are available in all families. The generic descriptive feature of these alphabetic characters was diluted by various companies participating in the market at its peak, and are not always consistent especially with more recent offerings. In a few instances, such as the andthe same suffix in different families do not have completely equivalent logic functions.
Another extension to the series is the xxx variant, representing mostly the bit wide counterpart of otherwise 8-bit-wide "base" chips with the same three ending digits. Thus e. Some xxx parts, however, do not have a direct counterpart from the standard 74xxx range but deliver new functionality instead, which needs making use of the xxx series' higher pin count.
For more details, refer primarily to the Texas Instruments documentation mentioned in the References section. Parts in this section have a pin count of 14 pins or more. The lower part numbers were established in the s and s, then higher part numbers were added incrementally over decades. IC manufacturers continue to make a core subset of this group, but many of these part numbers are considered obsolete and no longer manufactured.
Older discontinued parts may be available from a limited number of sellers as new old stock NOSthough some are much harder to find. As board designs have migrated away from large amounts of logic chips, so has the need for many of the same gate in one package. Now logic can be placed where it is physically needed on a board, instead of running long signal traces to a full-size logic chip that has many of the same gate. All chips in the following sections are available 4 to 12 pin surface mount packages.
The "x" in the part number is a place holder for the logic family name. All chips in this section have one gate, noted by the "1G" in the part numbers. All chips in this section have two gates, noted by the "2G" in the part numbers. All chips in this section have three gates, noted by the "3G" in the part numbers. From Wikipedia, the free encyclopedia. Redirected from List of series integrated circuits. Wikipedia list article. Texas Instruments.