Electronics > Beginners

Need trouble shooting help (pics)

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billbyrd1945:
Okay guys. I'm sorry to be so dense. Several of you have commented that I need to get with the program and draw my schematics in the traditional way for a start. I think I have some kind of a spatial disorder that makes it hard for me to use a scientific drawing as opposed to my third-grader's version. But I'm going to force myself to do it from here on. You never improve yourself if you don't try. So, going back to the bench to start over again. You can be sure I'll let everyone know if I can get this motor run wide open on 12v having been switched on with a mere 5v.

rsjsouza:
billbyrd, great suggestions all around, but I just wanted to tell you something: I love your board with the glued parts and the written values on the wood. I don't know if nostalgia is influencing me, but I did a lot of these circuits assembled on wood - although I used nails to keep things together and the terminals were enough to hold the parts in place.  :-+

alsetalokin4017:

--- Quote ---The motor I have just happens to draw .056mA,
--- End quote ---


Er.... I'll wager it draws quite a bit more than that when supplied with 12 volts, or even 5 volts.

As part of the learning experience please be sure that you locate your decimal point correctly and that you use conventional abbreviations. "mA" is short for milliamps, that is, thousandths of an ampere. To avoid confusion when writing decimal values less than one,  I always recommend not suppressing the leading zero: "0.056" is clearer than ".056" which doesn't inspire confidence: it could be a typo or... a misplaced decimal.

Also you can "breadboard" circuits pretty easily by laying out the schematic using a conventional organization, then pretty much duplicating that layout on your board. I use solid copper wire (stripped from 4-conductor phone wiring) inserted into small holes in the wood to make "power busses" and other connections for soldering, and I use sockets for transistors whenever possible. You can adapt 3-pin molex female connectors to make transistor sockets if you can't find actual ones. An example of my little "breadboards":

ArthurDent:
Try this.

billbyrd1945:
Ha! Yes! The biggest reason I do that is because I don't trust breadboards for good connections.

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