 |  | Quote: |  | | Posted by mdiede57 | | |  |
| Golddigger, you think you can construct the power supply, to give direction as to which connections would go to what on the 840 schematic? I dont see which connections would connect where. I am getting +9v, +5.802v, -9v and 583.mv. ( i'm working in Multisim) and not sure the transistors are accutate, as I cant find the correct ones in the library. I was attempting to draw out the schematic, and produce circuit board, which is another frustration i see in multisim, to create a circuit board. and ideas, or help you can offer would be great.
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The power supply is on the schematics. It consists of two 9 volt batteries.
It looks as if building your own detector is a bit outside of your abilities. Buy one.
I just received a PM from someone and I figured I'd better clarify my answer a bit.
The power supply has two 9 volt batteries which feed sections of the circuit with 9 volts, which is all right for CMOS devices. There are also two regulators built into the power supply which supply the rest of the circuit with appropriate voltages. Just build it according to the schematic and you will be fine.
The raw 9 volts (square surrounded + and -) only goes to places where it is all right to do so. The regulated voltage (circle surrounded + and -) goes to the places where it should. They are not the same point electrically so they should be separate wires or traces on a PC board. The question above indicated that the questioner wanted me to design a power supply for the schematic. My reply was that the schematic already contained one that was suitable. That reply was accurate and remains accurate.
If any of you reading this need help in understanding schematics, there are links here on this forum in topics under the DIY section that will get you to some tutorials.
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« Last Edit: December 27, 2009, 05:03:09 pm by GoldDigger1950 »
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