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blueroomelectronics said:After looking at the complexity of the circuit I remeber why I got started in microcontrollers in 1976.
You have a capacitor with hardly any capacitance and a resistor that sinks hardly any current.cannibal said:I understand with this connection and values the reset issue will going to be solved ?
I use a 1M resistor and a 0.33uF capacitor for power-up reset on Cmos.Hero999 said:Alright I probably was confusing it with CMOS, but even so, it's LS which doens't use as much power as TTL, I can't remember what the input current is but it's not that high.
I wouldn't use a capacitor any larger than 1:mu:F and a resistor no lower than 1k.
I used 100pf and 1M on my college project?audioguru said:I use a 1M resistor and a 0.33uF capacitor for power-up reset on Cmos.
I admit I was wrong about that.I posted the max current rating of 0.4mA for each of the two reset pins of the 74LS90 earlier in this thread. Here it is again: