11-15-2013, 05:13 PM
EdK, thanks for youe input.. I am not an electronic wiz so I sent the comments to my friend. Keep in mind he is French and I translated his memo to english as best I can. from what I can see, he is implementing some of your suggestions.
Claude, what he says is true, but in a same chip circuits are very similar. The peak current would last a few billionths of seconds in non-repetitive ways which is negligible. With the cmos circuit, the current consumption is 50 microamps of current at rest (LED off), this gives a period of 3 years on batteries. To use a transistor would consume 1 milliamp of current at rest which would require an ON OFF switch because the battery would last only 160 hours. But critic is good because if I add a second transistor for the first Darlington mounting, I will do a circuit with the same consumption as the cmos but simpler. I'll recalculate another circuit with two transistors. Here is the corrected cmos circuit.
Claude, what he says is true, but in a same chip circuits are very similar. The peak current would last a few billionths of seconds in non-repetitive ways which is negligible. With the cmos circuit, the current consumption is 50 microamps of current at rest (LED off), this gives a period of 3 years on batteries. To use a transistor would consume 1 milliamp of current at rest which would require an ON OFF switch because the battery would last only 160 hours. But critic is good because if I add a second transistor for the first Darlington mounting, I will do a circuit with the same consumption as the cmos but simpler. I'll recalculate another circuit with two transistors. Here is the corrected cmos circuit.
claudef, proud to be a member of Metalworking Forum since Mar 2012.