Boncuk
New Member
I can't get the 4017 to output enough power to operate either a lamp or a relay coil. I can get the output to switch on a transistor but I then burn up the transistor...
If you burn a transistor you certainly did a fatal mistake (e.g. too high base current). Please post your schematic with a transistor connected to a 4017 output.
Also, could someone explain in layman's terms what the 74ls192 chip does? I can't find any good example circuits that use it and explain what's happening.
Thanks everyone!
The 74LS192 is a BCD up/down counter. Depending on the count direction (pin4=down, pin5=up) the counter value increases/decreases by the decimal value of 'one' with each clock pulse arriving at one of its inputs.
For your application with a fixed value to load into the counter you can load any number between 0 and 9 which will be displayed on a 7-segment display (with a BCD to 7-segment decoder driving the display) and counts down to zero where the counter has to be stopped from rolling over. (similar to the 4017 which counts from zero through nine and restarts if not stopped)
Boncuk
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