Search found 80 matches

by mikeb
Wed Aug 13, 2003 11:54 pm
Forum: General Discussion
Topic: 27C256/27C512 SOIC.TSOP EEPROMS QUESTION
Replies: 2
Views: 1696

27C256/27C512 SOIC.TSOP EEPROMS QUESTION

HELLO ONCE MORE AND AGAIN THIS TIME MY REQUEST IS A SIMPLE ONE, IM LOOKIN FOR SOME INFO ON SOIC OR TSOP 27C256 OR 27C512 EEPROMS. ACTUALLY I HAVE DATA BUT ALL THE IC'S IM FINDING ARE OTP TYPES, I TRYING TO FIND OUT IF THE SOIC OR TSOP, 27C256 OR 27C512 EEPROMS ARE EVEN MADE TO BE ERASED AND REPORGRA...
by mikeb
Mon Aug 04, 2003 1:02 pm
Forum: General Discussion
Topic: bcd switch info
Replies: 4
Views: 1321

Re: bcd switch info

thanks for the info guys the switch happens to a complimented bcd switch
lead 1 is 1
lead 2 common
lead 3 is 4
lead 4 is 2
lead 5 is common
lead 6 is 8
with each movemrnt of the rotary switsh giving the compliment of the digit shown thanks much for the help
by mikeb
Sun Aug 03, 2003 10:00 pm
Forum: General Discussion
Topic: bcd switch info
Replies: 4
Views: 1321

bcd switch info

hello again guys id lie to know if there is anyone that can tell me how the bcd switch works. the one i have has a switch that capable of accessing the digits 0 thru 9 which i understand to be the bcd code the switch has 6 pins an i havent been able to figure out with an ohm metter exactly wqhat hap...
by mikeb
Wed Jul 30, 2003 7:47 pm
Forum: General Discussion
Topic: stepper motor problems
Replies: 6
Views: 1591

Re: stepper motor problems

HELLO GRANT ,WILL,CHRIS I WAS JUST STOPPING BY TO THANK ALL U GUYS FOR THE INFO U GAVE ME ON STEPPERS, THE JONES SITE WAS REALLY HELPFUL AS WELL. THE PROBLEM TURNED OUT TOP BE THAT I NEEDED TO APPLY POWER TO BOTH COMMON LEADS AT THE SAME TIME IN ORDER FOR THER MOTOR TO ROTATE. THE ARTCLE I WAS USING...
by mikeb
Tue Jul 29, 2003 6:57 pm
Forum: General Discussion
Topic: stepper motor problems
Replies: 6
Views: 1591

stepper motor problems

i have a unipolar stepper motor thats rated 5 volts 3.6 ohms, step angle 7.5 degrees 1.38 amps/phase, my questions is whether this is the maximum allow current that the coils can handle per step angle or is this the current that is required to make the motor rotate.the motor is from a surplus source...
by mikeb
Sun Jun 22, 2003 10:33 am
Forum: General Discussion
Topic: stepper sources
Replies: 2
Views: 960

stepper sources

does anyone hvae any info on good sources for stepper motors 6 or 8, 4 phase unipolar motors, im trying to find some at a good price preferrable new ones, so that they are shipped with data sheets. thanks in advance for any info you might have.
by mikeb
Mon Jun 16, 2003 1:20 pm
Forum: General Discussion
Topic: adding an 8 bit input port to an hc11
Replies: 0
Views: 756

adding an 8 bit input port to an hc11

hello im tryig to add an 8 bit input port to anhc11 using a 74hc597. im able to only read the proper input from the 597 when its either 0000 or 0001 all the other possible combination of bits which is 256 withan 8 bit port will not register inthe hc11 it only reads 0000 an 0001.im using a 8 postion ...
by mikeb
Mon Jun 09, 2003 9:13 pm
Forum: General Discussion
Topic: 9 WIRE STEPPER MOTORS
Replies: 0
Views: 811

9 WIRE STEPPER MOTORS

DOES ANY 1 KNOW WHERE I CAN GET THE PINOUT FOR A NIDEC 9 WIRE 4 PHASE STEPPER MOTOR, OR HOW I CAN DETERMINE WHICH IS PHASE 1 THRU 4 FOR THE MOTOR AND IS THE USE FOR THE OTHER WIRES. ANY INFO WOULD BE MOST APPRECIATED.
by mikeb
Mon Mar 24, 2003 4:14 pm
Forum: General Discussion
Topic: power line hum in audio circuits ?
Replies: 3
Views: 1067

power line hum in audio circuits ?

does ay one have knowledge of how i can remove the power line hum from a audio circuits output. ive built a microphone circuit that im using as an input to a 3 input mixer, and the circuit works fine except that when it's powered up it makes a humming noise. when i increase the volume level at the o...
by mikeb
Sat Mar 08, 2003 2:54 pm
Forum: General Discussion
Topic: seeking info about the hcload software program
Replies: 0
Views: 700

seeking info about the hcload software program

hello once again guys:
is there anyone with knwledge about the hload pgramthat can be used to verify and program external eeproms.
by mikeb
Thu Mar 06, 2003 9:09 pm
Forum: General Discussion
Topic: needing a dc volt amp circuit
Replies: 4
Views: 1449

Re: needing a dc volt amp circuit

THAKS MUCH GREG AND RUSS FOR THEUSEFUL INFO. I WAS USING A OP AMP TO BUILD THE CIRCUIT I NEEDED AND WAS HAVING PROBLEMS, BECAUSE I WAS USING VOLTAGE DIVIDER BIAS FOR THE 741. THIS CAUSED THE OUTPUT TO RIDE A DC OFFSET OF 6 VOLTS IF UING A 12 SUPPLY, AND NOT BEING ABLE TO USE COUPLING CAPS TO BLOCK T...
by mikeb
Thu Mar 06, 2003 12:23 pm
Forum: General Discussion
Topic: needing a dc volt amp circuit
Replies: 4
Views: 1449

needing a dc volt amp circuit

good afternoon everyone;
im in need a of schematic diagram or url that shows how to build a simply dc voltage amplifier that would be used to amplify a small 20 to 200 millivolt signal up to 4.5 to 5 volts.the 20 to 200 millivolt signal is the output of an ir phototransistor.
by mikeb
Fri Feb 21, 2003 10:54 pm
Forum: General Discussion
Topic: microcontoller ? made easy
Replies: 3
Views: 1486

microcontoller ? made easy

can anyone tell me what does this snipet of code means it came from a motorola source program file for verifying and reprogramming the configuration register of a hc11. this is only a partial listing.<p>this part i understand:<p>eelat equ $02 eepgm equ $01 byte equ $10 erase equ $04<p>this part of t...
by mikeb
Wed Feb 19, 2003 7:52 pm
Forum: General Discussion
Topic: MICROCONTROLLER INTERNAL EEPROM ?
Replies: 0
Views: 851

MICROCONTROLLER INTERNAL EEPROM ?

IS THERE ANY 1 WITH KNOWLEDGE ABOUT MICROCONTROLLER INTERNAL EEPROMS, MY QUESTION AND PROBLEM FOLLOWS. FIRST I RECENTLY PURCHASED A HC11A1P MICROCONTOLLER THAT HAD IS INTERNAL EEPROM OFF THIS IS UNUSAL FOR THIS FAMILY OF CHIPS FROM WHAT I KNOW ABOUT THE CHIP. SO I VISITED THE MOTOROLA WEB SITE AND F...
by mikeb
Sat Feb 15, 2003 6:07 pm
Forum: General Discussion
Topic: microcontroller help
Replies: 0
Views: 672

microcontroller help

is there any 1 with knowledge about the hc11a1p1 microcontroller chip. my question is whether this chip is every shipped withthe eeprom bit in the configuration register cleared. i recently brought 1 and the internal eeprom bit is cleared. also im using buffalo monitor to test code for this chip, wh...