DIP/SIP resistors
 

does any body know where to get DIP or SIP resistors and how to use them?

Re: DIP/SIP resistors
 

My experience with using resistors in a DIP or SIP environment has been that the resistors are standard two terminal resistors that have been soldered onto a DIP or SIP carrier. Usually five or six resistors can be placed on one. I believe they're for-sale on McMaster Carr.

If you are having more problems with this, drop me a line in two weeks when I'll be back in Rochester.

Matt

Re: DIP/SIP resistors
 

www.Digikey.com

they are not exactly soldered onto the carrier, they are formed from a single piece of material, so one of the benefits is they tend to be very close to each other in value (where impedance matching is important)

other than that, its just a convenient package when you need 4, 6, 7 or 8 resistors all with the same value, like pullup resistors on a bus for example.

Re: DIP/SIP resistors
 

Be aware that these packages are available in different configurations. Some are individual resistors with both leads brought out or they are available with one side of the resistors in common to a single pin. This helps when you are planning to use them for pullups on digital inputs. In analog circuits, as Ken has pointed out, resistor groups can be optimized for better precision than 1% and are often used when designing op amp circuits that require tight gain matching and the best common mode rejection, differential amplifier charachteristics and temperature stability. The Digikey catalog has some of the wiring styles available and often will link to manufacturers websites for further details.

Re: DIP/SIP resistors
 

Al,

In this thread you use multiple resistors for the switch.

Is this a good place to use a SIP resistor network?

Re: DIP/SIP resistors
 

Andy,
It is not essential to have matched resistors in that application since you want the code to be a window comparator to handle variations in power supply voltage. If you had an application that only used part of a network and you had just enough left over for a switch(es) that would be an efficient use of components. The switch we use from Radio Shack is designed for wire so we used 1/4W resistors wired to the switch terminals and then we only had to bring back two wires to the analog joystick input. We had to mechanically modify the switch by removing a stop and that allowed a six position switch to fully turn to 11 positions. (It also reguires the removal of one of the wipers. It isn't pretty when you're done but it works well for our purposes.

Re: DIP/SIP resistors
 

I know this is a little off topic....

I bought that switch and the resistors last year but we never built it. I do not want to tie up so many digital inputs this year so I am exploring this alternative. I see that Jameco has an eleven detent 100k pot in their catalog. Any thoughts on this pro/con?

Re: DIP/SIP resistors
 

That looks like a pretty sweet solution, if the detents are sufficiently heavy. I'm not sure a torque of "100-400gf.cm" would be enough to keep it from getting bumped too easily; it's designed as an analog control knob, not a multiple-position switch.

Re: DIP/SIP resistors
 

Andy,
I don't know if the pot would work as great as the switch. I have used these pots for volume controls and they are not repeatable as the switch it. The detent is accomplished by a disk with bumps on it. (just stamped out part)
They also have an 12 position switch that looks identical to the Radio Shack part. We put a round knob and it is not easily bumped. All it selects is a different auto mode. The program looks at the switch value (voltage) and jumps to a different routine on that basis. We have used this method for three years now.

Re: DIP/SIP resistors
 

that is the "Nigel Special", used only on custom Marshall Guitar amplifiers!