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On the datasheets from Texas Instruments there are typical graphs and minimum graphs.I dunno, the TI data sheet for the 4017 kinda sucks. As a production designer you have to assume worst case to ensure your design will work in large production runs. The data sheet table shows very low IOL specs as typical, the graph shows a different picture.
More overdesign. You wouldn't last one day in business.
You say you are an electronics engineer. Show me where you can get a 9V/100mA battery. I want to buy one.
On the datasheets from Texas Instruments there are typical graphs and minimum graphs.
10V supply, 2.0V LED without a current-limiting resistor:
Typical current = 18.5mA.
Minimum current = 9.5mA.
Plenty of current for a bright modern LED. Very old LEDs might look dim.
On the datasheets from Texas Instruments there are typical graphs and minimum graphs.
10V supply, 2.0V LED without a current-limiting resistor:
Typical current = 18.5mA.
Minimum current = 9.5mA.
Plenty of current for a bright modern LED. Very old LEDs might look dim.
colin55;718009]I could not design the circuit myself as I have no ability in this field. But I have found this circuit on the web:
**broken link removed**
A battery capacity is not expressed as: "The 9V block battery doesn't have more than 100mA/h."
It is: 100mA-h. or 100mAhr or 100mAh There is a big difference.
If we are talking about this sequencer circuit, this does not apply - unless you have 2 or 3 LEDs in one of the lines - but that was not stipulated.
I have supplied the circuit diagram.
You don't know your terminology.
Show me the animated picture showing two LEDs lit simutaneously.
I guess you have not tried it.The datasheet does not make a distinction between outputs on single device and outputs from one device to another. Blah, blah blah.
We do this for fun, not for profit.Responsible design requires documented information provided by the manufacturer for the specific device. At least two other leading manufacturers (ON semi, and NXP) do not specify Iout for greater than 0.5v output drop with 10v supply. Characteristic Vo vs. Io beyond that point is undefined. Monolithicity is not a design parameter, and is not a measure of how well transistors within a specific device are matched. How well the transistors are matched depends on several factors, such as tolerances used in the artwork, variability allowed in test and manufactering, and control of microscopic variances in the wafer. Blah, blah, blah.