Search found 80 matches

by mikeb
Sun Jul 04, 2004 4:25 pm
Forum: General Discussion
Topic: el backlighting question
Replies: 2
Views: 1035

Re: el backlighting question

THANKS FOR THE RESPONSE.
by mikeb
Thu Jul 01, 2004 11:24 pm
Forum: General Discussion
Topic: t6963c lcd controller
Replies: 2
Views: 1000

Re: t6963c lcd controller

i actually stated that wrong pin#2 for the lcd drive is on the 40 pin connector that interfaces the lcd, pin#2 at the controller is at pin#15 on the interface connector. im having quite a few problems trying to get this display working, with the +4.82 volts at the negative lcd drive input 1 or 3. a ...
by mikeb
Thu Jul 01, 2004 10:56 pm
Forum: General Discussion
Topic: el backlighting question
Replies: 2
Views: 1035

el backlighting question

i was wanting to know if el backlight work by basically on the same principle as led backlighting minus all the technical application that involved with the inverter,like with led backlights which can be turned on by simplying applying the supply voltage and current limiting resistor. will simply ap...
by mikeb
Thu Jul 01, 2004 4:20 pm
Forum: General Discussion
Topic: t6963c lcd controller
Replies: 2
Views: 1000

t6963c lcd controller

hi im trying to use a graphics display that uses the t6963c controller,this ic lists pin#2 as the negative supply for lcd driving, whne i connect the display to the hc11 with this pin disconnected i measure +4.82 volts but the pin is supose to be an input for lcd drive and and a negative voltage of ...
by mikeb
Fri Jun 25, 2004 7:45 pm
Forum: General Discussion
Topic: bmp. file to .s19
Replies: 0
Views: 889

bmp. file to .s19

hi im trying to change the format of a .bmp file to .s19 does any one know how i can create this file. i whave tried to cretae it using a eprom programmer by saving the file as a .hex file first then assemle the .hex in a hc11 crossassembler to create the .s19. when i save the .bmp as a .hex file i ...
by mikeb
Sat Jun 05, 2004 5:01 pm
Forum: General Discussion
Topic: stepper motor problems
Replies: 3
Views: 1118

Re: stepper motor problems

edd are you saying connect a darlington to each 3055 input at the base by making the 3055 a darlington with the first input transistor being a 2n2222a, with its collector connected to the collector of the 3055, and the emitter of the 2n2222a connected to the base of the 3055, which would create the ...
by mikeb
Fri Jun 04, 2004 9:04 pm
Forum: General Discussion
Topic: stepper motor problems
Replies: 3
Views: 1118

stepper motor problems

im here again with a whole new problem? im trying to interface a ede1200 stepper motor ic to a 5 v 7.5*step angle 1.38 amp unipolar stepper motor. the data sheet for the ic has a hookup diagram for motor that drawup to 10 ampsper phase. the circuit is basically 4 mje3055 power transistors used as sw...
by mikeb
Fri Jun 04, 2004 8:49 pm
Forum: General Discussion
Topic: re: interface problem
Replies: 0
Views: 804

re: interface problem

thanks for the replys but the problem was in the code after i inserted a very short delay after the relay is switch on an before the micro executes its next instruction the system is working just fine. thanks for all the responses
by mikeb
Thu Jun 03, 2004 1:33 pm
Forum: General Discussion
Topic: interface problem
Replies: 4
Views: 1276

interface problem

hi guys in trying to interface a temp sensor kit that i built with a timer based microcontroller board. the units seperately work just fine the timer board keeps time an date data an will branch thru all it routines, seperately the temp sensor kit works equally as well. to interface the 2 systems to...
by mikeb
Tue May 18, 2004 2:53 pm
Forum: General Discussion
Topic: 4 line lcd display
Replies: 0
Views: 847

4 line lcd display

im using a 4 line lcd display and i want to know if any single line of the display can be scroll seperately right to left using the built in shift function of the display and if so how can i impliment this type of control.
by mikeb
Sat May 08, 2004 5:18 pm
Forum: General Discussion
Topic: looking for a schematic/hookup diagram
Replies: 1
Views: 703

looking for a schematic/hookup diagram

does any one have any information or a hookup diagram for the global specialties dpk-1 digital pulser. the unit is based around the mc14093b and comes in a kit form. i was able to purchase one of these kits at a very reduced price because it was less the schematic /hookup diagram in hopes id be able...
by mikeb
Sat Apr 03, 2004 8:53 pm
Forum: General Discussion
Topic: LM567CN tone decoder
Replies: 2
Views: 963

Re: LM567CN tone decoder

I'm also wondering if maybe the passband is not set properly, which from the data sheet is set with the ext. caps at pin1 and pin2.<p>At pin1 I have a 2.2uf cap, at pin 2 I have a 1uf cap, pin3 is the input, pin4 is vcc at +5volts, pin5 goes to pin6 thru a 2.7k resistor with a 1uf cap from pin6 to g...
by mikeb
Sat Apr 03, 2004 8:34 pm
Forum: General Discussion
Topic: LM567CN tone decoder
Replies: 2
Views: 963

LM567CN tone decoder

I'm building a unit that recieves preset frequencys that are to be decoded by the lm567cn tone decoder, I.m using a function generator to create the decoder frequencys at the decoder input, that the transmitter will send to the reciever/decoder unit. I can get the tone decoder to work but,it appears...
by mikeb
Tue Mar 30, 2004 9:34 am
Forum: General Discussion
Topic: 433mhz data reciever
Replies: 3
Views: 1228

433mhz data reciever

i recently purchased a 433 mhz data reciever and transmitter modules seperate units. the receiever seems to only work intermittently or when my hand is in close contact with the antenna. the manual for the reciever says that the simplest antenna is a length of wire 7 inchs long an for better recepti...
by mikeb
Mon Mar 29, 2004 8:28 pm
Forum: General Discussion
Topic: ultra sonic xmitter and rec.
Replies: 2
Views: 1013

Re: ultra sonic xmitter and rec.

ed no i didnt buy the whole kit i did just buy the transducers and crystal, and the crystal is quartz can (digi-key) type, looks more like a surface mount crystal but it is resonating at 40 khz