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2 votes
4 answers
339 views

What is the correct maximum value for resistor R₁?

How do I calculate the maximum value of resistor R1 if the following values are known: VDD = 5 V inverter CMOS CD4069UB IIL = IIH = 0 mA VOH = 4.95 V VOL = 0.5 V IOH = IOL = 0.6 mA VD = 1 V maximum ...
Aleksa Majkic's user avatar
1 vote
2 answers
203 views

More advice desired on my Model Railroad Building light controller circuit

Building is built in O Scale (1/48) and has 40 rooms that are lighted independently (masked out from each other with walls) Rooms are lighted with White LEDs. The rooms will light one at a time (but ...
Wdasilva76's user avatar