Provides tips in using Digital Command Control in operating a model train. Application of a 1.5-volt light bulbs by adding a voltage-dropping resistor; Measurements for the bulb current; Calculations for choosing the proper...
Of course the potential devider will also need taking to the negative supply (real ground) as you are so close to the virtual ground with your desired trigger point youmight as well connect two resistors of equal value, one from pthe potitive rail and one to the negative rail and then ...
In the voltage dropping circuit 50, resistors 1-4 connected in series divide the external power source voltage VCC to plural voltages, and vary the voltages of nodes 6-8 in accordance with a level of the external power source voltage VCC. Inverters 9-11 and NAND 12-14 activate selectively ...