Search found 2782 matches

by duikkie
Tue Feb 20, 2018 12:02 pm
Forum: software: other
Topic: Hacking the school Econet
Replies: 11
Views: 270

Re: Hacking the school Econet

why am i so bad in finding :) somewhere on this forum i uploaded a program was it nice programs , i don't know anymore but i wrote a program to get all usernames and passwords from econet. Here? http://www.stardot.org.uk/forums/viewtopic.php?p=90175#p90175 10 MODE7 20 PROCinit 30 PROCtrack 40 PROCso...
by duikkie
Tue Feb 20, 2018 11:17 am
Forum: software: other
Topic: Hacking the school Econet
Replies: 11
Views: 270

Re: Hacking the school Econet

somewhere on this forum i uploaded a program was it nice programs , i don't know anymore but i wrote a program to get all usernames and passwords from econet. as allways with my programs most of them are not finisched :) what i rember that all usernames and passwords where on floppy with second proc...
by duikkie
Tue Feb 06, 2018 6:58 pm
Forum: off-topic
Topic: TODAY i am looking for
Replies: 20
Views: 881

Re: TODAY i am looking for

coils with value 2700 uH and look like a big resistor 1/2 or 1 watt ( silver,red,purple,red,gold) see other item :D

the other one is 560 uH ( to buy in china :) )
by duikkie
Tue Feb 06, 2018 10:03 am
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

we have a winner :) the piezo amp in drawing is a H- bridge ( no amplifier ) t1=a pnp , t2=npn , t3=npn and t4 (inside ne555) = npn further is t3 a little strange because C is on vcc , niet standaard H-BRIGDE so if d2 is a zener what value ?? 14.7 ?? or to much ? it was a puzzel . but now i can buil...
by duikkie
Sun Feb 04, 2018 5:54 pm
Forum: general
Topic: very cheap pcb spacers
Replies: 6
Views: 160

Re: very cheap pcb spacers

everybody in holland has about 1000 http://www.ikea.com pencils around . every sunday looking by ikea eat about 1 euro too :D picture tell all about the dutch :) 4 i think 1/2 watt resistors standing up in veroboard not connected to uppper board (pi zero) Nice... =D> And more Dutch solutions... :D I...
by duikkie
Sun Feb 04, 2018 4:13 pm
Forum: general
Topic: very cheap pcb spacers
Replies: 6
Views: 160

Re: very cheap pcb spacers

(still) out of the box thinking #-o

the resistor must be 29M ohm 5% (red,white,blue,gold ) :shock: #-o
by duikkie
Sun Feb 04, 2018 2:45 pm
Forum: general
Topic: very cheap pcb spacers
Replies: 6
Views: 160

very cheap pcb spacers

picture tell all about the dutch :)

4 i think 1/2 watt resistors standing up in veroboard not connected to uppper board (pi zero)
by duikkie
Sun Feb 04, 2018 1:12 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

if i read well even a A type transistor can handle above 45 khz. so if h-thing is the amplier and t2 must be NPN , the question is still what t3 must be normal you have two pnp and two npn, but because disch is a NPN + invertor looks like PNP ?? then t3 must also be NPN ? i think i have seen that on...
by duikkie
Sun Feb 04, 2018 10:30 am
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

not get it yet ?

an other ne555 block but png file ?? https://www.electrical4u.com/555-timer- ... s-working/
by duikkie
Sun Feb 04, 2018 9:42 am
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

found this with npn-pnp
by duikkie
Sun Feb 04, 2018 8:21 am
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

i think i have seen that on internet somewhere with a motor (not piezo) , if i rember it , it was npn,pnp--npn,pnp but i this case , then t1=pnp,t2=npn,t3=pnp,t4=(ne555)npn i think i made a fault maybe i used a low npn because 4c= type c maybe type a for npn is to low /slow (freq.=10 to 45 khz) i wi...
by duikkie
Sat Feb 03, 2018 7:29 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

by the disch second ne555 - looks like S but it is -sp :)

1024MAK wrote:In your schematic (in this post) where is -sp shown in the circuitry?

Mark
by duikkie
Sat Feb 03, 2018 6:46 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

foto
4C = BC859C Phi N SOT23 BC559C
by duikkie
Sat Feb 03, 2018 6:38 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

i have seen this circuit :) , but the problem is in my drawing by piezo amp? the first PNP is right not broken the second i am not sure anymore that it is a NPNi have seen that on internet but i soldered that in and ther was no sound ? allso number 3 of the transisor was broken and this is the most ...
by duikkie
Sat Feb 03, 2018 4:02 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

oke found a little doc about to get from square wave to sinus wave :) with inductor and cap ( or resistor) so the 2700 uh coil and 100 ohm resistor is for the square wave form from ne 555 to sinus wave the phase i do not get it yet phase= ??? , this means it comes after the block or is negative ? an...
by duikkie
Fri Feb 02, 2018 1:58 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

d2 can be a zener but that part was not broken. i have replaced d1 with a big diode and the 2 hz side of the ne556 is working the only problem i don't get sound out of the second part the 5khz- 40 khz side i get signal on pin 9 ( out) and it is the 5 to 40khz block signal , but i don't think the pie...
by duikkie
Fri Feb 02, 2018 6:08 am
Forum: off-topic
Topic: TODAY i am looking for
Replies: 20
Views: 881

Re: TODAY i am looking for

it is a small hole 2 mm veroboard, can't drill anything in it a tracks are used and 3 mm will cut a line. maby a coil with wire is on the top 2 mm left and small on the other side ? to solder. For stripboard or Veroboard, I drill 3mm size holes where I want the mounting points to be. Then use a comb...
by duikkie
Thu Feb 01, 2018 8:28 am
Forum: off-topic
Topic: TODAY i am looking for
Replies: 20
Views: 881

Re: TODAY i am looking for

why , why,why ??? i am thinking of using a diode or something like pcb spacer :evil: drawing : the 0.5 mm end to solder in a hole of the veroboard the body of a component like diode the other eind 2 or 2,5 mm for the other board (the problem :) ) length = 12mm the registor cutting of one end some gl...
by duikkie
Wed Jan 31, 2018 2:21 pm
Forum: off-topic
Topic: TODAY i am looking for
Replies: 20
Views: 881

Re: TODAY i am looking for

oke today i am looking for things to make a veroboard 4 holes to stand 3cm from desk. i know you did have plastic things for a motherboard in pc. looking for this or a small tube. maybe this is standaard somewhere around ?

---------- pcb board

______________ desk

and how are the called :)
by duikkie
Mon Jan 29, 2018 8:30 am
Forum: hardware
Topic: 2 Faulty Beebs
Replies: 89
Views: 1547

Re: 2 Faulty Beebs

You need only a 6502 for one to work the second 6522 can put on later as userport i think is board where use to swap ics Ok, an update. Just to recap (if you'll pardon the pun), a friend brought me his two faulty Model B units. - 1 PSU is dead and I had to re-do the recapping on the other (C9 was in...
by duikkie
Sun Jan 28, 2018 1:16 pm
Forum: hardware
Topic: BBC Model B and DFS Problem
Replies: 75
Views: 1618

Re: BBC Model B and DFS Problem

To select the sd card with the mmc rom you must put *dmmc first or *card then *cat Use smart-spi rom or the mm thing mmc rom and turbo rom is old software I put the DFS ROM on the highest place (15), now I can access the floppydrive, but when I try to load a game from mmc, the floppydrive starts to ...
by duikkie
Sun Jan 28, 2018 7:24 am
Forum: hardware
Topic: BBC Model B and DFS Problem
Replies: 75
Views: 1618

Re: BBC Model B and DFS Problem

i think your mmc rom is higher then your dfs rom :) ,(15=mmc?) i as person will not use MM.. rom , i like SMART-SPI rom :shock: :lol: but if you want disc to format floppy , try *disk and then the format program , else put dfs in 15. to use SMART-SPI or mmc rom or turbo rom use *dmmc / *card sometim...
by duikkie
Sat Jan 27, 2018 11:25 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

With more animals :) it works perfect if you tune it i am old so every swiping sound i do not hear above 15 khz i think but it cost 30 euro one and it has only a ne556 And a piezo buzzer i can make this cheaper :) So it is 15 khz about 2 a 3 khz every 2 times a second but the second ne 555 is not as...
by duikkie
Sat Jan 27, 2018 1:48 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: help by explaining schematic

first astable ne556 a get. like application information ne555 ( 2 HZ) the second is different : condensator is 2N2 on thres and trig but Ra(or)Rb=3.82K is with transitor connected with out and disch ??????? the other R is 6K9 and 50K connected with thres/trig to OUT ??? i think i did get the piezo a...
by duikkie
Sat Jan 27, 2018 1:38 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: schematic riddle

the hole schematic for kemo m071 not understand all yet
by duikkie
Sat Jan 27, 2018 9:02 am
Forum: hardware
Topic: BBC Model B and DFS Problem
Replies: 75
Views: 1618

Re: BBC Model B and DFS Problem

HOO, HOO , the dutch still have teletext :) and allso a teletext adaptor :) , the teletext rom in ram :) Thank-you Jonathan, I did realise that but I find T-Break easier to remember for tape invocation and easier to convey to others, especially since Telesoftware is obsolete and nobody has that feat...
by duikkie
Fri Jan 26, 2018 12:43 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: schematic riddle

the brown thing is broken , the other half is in the bleu resin what was covering the board, in the bleu resin there is allso a smd transitor and a top of a smd transitor :) left the top half of the diode ?? right you can see the two smd transitors I would need a higher resolution image to be sure w...
by duikkie
Fri Jan 26, 2018 8:44 am
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: schematic riddle

the board

picture under:

the brown thing is the broken ? (diode i think)
the smd is d2
by duikkie
Fri Jan 26, 2018 8:28 am
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: schematic riddle

i will try it with schematic i think is right ;) the d1 is the ? because it is broken the d2 is a smd with tree legs 1 and 2 gives 0 ohm between 1,2 and 3 it looks like a diode the r1 is 2 ohm 2. the r2 is 2 kilo 2 the t1 is a pnp sd 336 transitor what is on the vdd or gnd is not important ( it is a...
by duikkie
Thu Jan 25, 2018 2:02 pm
Forum: off-topic
Topic: help by explaining schematic
Replies: 25
Views: 711

Re: schematic riddle

It is a normal block generator 12 volt 150 ma i think i think the ? Is allso a diode if pos then vdd i only do not understand the smd diode ? If you put + 12 volt on the - then pnp blocks if you put - on + then a diode blocks it What is this from? What function is the NE555 providing? What are the s...