Posts posted by mixos
The issue of evenly PCB etching can be solved by adding a traveling mechanism that will be parallel to the board. That's a challenge also.
That's for sure a great idea that will help a lot, we will try to use common and easy to find materials.
Azax bottle sprayer is a good idea. Maybee some first tests can be done with it.
A windscreen's nozzle doesn't seems to work because it doesn't actually "spray" the water but shoot it in an almost straight line. I think the best nozzle could be one like garden's watering nozzle (maybe turning also) or a glass detergent bottle nozzle. Also, a mechanism from dish washing machine could do the job.
The fuel injection system seems to be not the easiest way and maybe it isn't etch resistant.
After a succesfull nozzle selection there is need for a powerfull pump that will recycle the fluid. Maybe one for windscreen clearing system could be nice.
That's good news Dazaa! The traveling mechanism is a nice idea! and for sure it is the most difficult to build! It must also be from etch resistant material!
That construction is a challenge!
That's nice! From now you are moderator along with MP and me to the Electronic Projects Design/Ideas section.
Check your private messages form more details.
Thanks you for helping to make this community even better.
From now Yevgeni P. is moderator in Theory articles section!
Thanks for your attitude to be a moderator. I saw your messages and i think you will be the perfect man for this position.
I am e-mailling you some details, check them and you are ready.
I am sure you will do your best ;)
What's your favorite board in the Community? Would you like to moderate it along with others and me?
Hello Yevgeni :)
To become a moderator the only thing needed is LOVE about electronics and have the appetency to frequently watch the board/s you moderate and if you see something not right or moral to act accordingly.
Have in mind that you won't be alone, also other moderators and admin watch the boards to keep the forum clear.
If you want to be a moderator tell me the board/s you like to moderate.
Thanks for your consciousness to make this community a nice place.
Yes, this datasheet was removed as requested from the manufacture.
Finally found this one:
from local distributor of Fischer Electronics.
Something like COH-1002 will be nice. It may be even more simple than this without any "extra" characteristics.
What do you propose to use as a "Heat transfer sheet" ?
I am searching something like this one:
Also check the ones that are hosted here:
The Original 2 Phone Link Design
This is the updated version of the very first Link circuit that I designed for Silicon Chip magazine here in Oz, back in 1996. It was a bit hardware heavy, (nd therefore expensive for what it would do) having two heavy duty relays and two by two transistor oscillators, for ring tone and ring impulsing. These items have been replaced with optocouplers and an NE 556 dual timer chip, as per the rest of the Link cicuits. It provides for basic communications between two phones only, and there aren't even any numbers to dial.
Project Link: http://www.electronics-lab.com/projects/telephone/016/index.html
The Link Telephone Intercom
This is the original version of the Link circuitry and it employs pulse dialling phones, a simple 2 chip circuita for producing service tones and counting dialled pulses. It uses a four wire circuit between each handset and the 'black box' switcher board, and employs 9 volt DC buzzers in place of the bellset, allowing for portability and battery operation. It would be a great introductory project for hobbyists and junior high school students studying the area of telephony and digital electronics.
Project Link: http://www.electronics-lab.com/projects/telephone/013/index.html
The Link A2B+1 Intercom
This version is more advanced than the original Link design in that it employs DTMF dialling, a simple relay matrix for internal signalling and external connection to an outside Telco line. This version also uses a simple ring voltage generator that actually rings the electronic ringer inside each phone, and a true 'ring trip' circuit that trips the ring and halts the ringer when the called party's handset is lifted up off hook. Useful for light internal and external phone traffic.
Project Link: http://www.electronics-lab.com/projects/telephone/014/index.html
The Link 4+0
This version is similar to the link A2B+1, except that is is for internal intercom use only. The outside line access circuitry has been removed, and an extra two phone handsets have been added. It has one or two extra possibilities, in that remote control applications can be employed, whereas this would be impractical in the original four phone Link circuit. It uses DTMF dialling, and only uses a two wire circuit between phones and the black box switcher board.
Project Link: http://www.electronics-lab.com/projects/telephone/015/index.html
Designed by Austin Hellier
30 November 2003
The error isn't permanently fixed. That means that the errors may reoccur in future. This is a strange bug that it's effects may not appear always but from time to time.
I am aware of all those errors.
All have the same cause that is a bug in the current version of PHP on the server.
I am trying my best to get rid of them!
I updated the clip to a new one that has this message attached:
"Click here for larger view"
Hope this one help people around here ;)
It depends on what kind of communication protocol you need.
Why don't you try some of the components distributors found here:
someone may accept paypal also.
Here it is:
You will need Winzip to unzip the files.
More info here:
Datasheet removed after STMicroelectronics request at 3/9/04
Here are the latest pictures of the latest electronic circuit box design from pvc pipes, and white plastic cornner moulding. the pvc pipe i used for the base and the plastic cornner moulding i used for the frame work, so when i cut the pannels from pvc pipes, which are cut down the side, then heated over the stove to soften it , before i flatten it out on the floor, then i cut the pannels and secure it with small screws, the inner frame work will conceal the screws so you wont see them. all i need to do before i start the pannel work, is cut flatt strips from the 2 sided plastic cornner moulding, to use as spacers to even the frame work so that the pvc made pannels will fit flatt against the frame work, before i secure the pannels with screws. this circuit box design i used a selleys all fix to give the white plastic cornner moulding a good seal so no gaps will be visible. in this design ive made the plastic cornner moulding frame work for the battery which sits inside it perfectly. the 12 volts high power lead acid cell battery . for the latest high voltage circuit to be installed.
by Steven (received via e-mail)
The links updated.
in one picture is the high voltage multiplier circuit inserted, and allso the 20 stage parralell capacitor board. fireing this up resulted in 20 x 630 volts capacitors blowing so i took out the parralell capacitor setup pending on some investigating. so if i reduce the 20 parralell caps down to 16, would be better, as i tested this when i had 16 parralell caps and it allways fires with a bang when i shorted them , in the picture some of the 4 extra caps dident go flatt to the board , and dispite blowing 20 caps which i think was a bit to many to have , the hv multiplier circuit still fires up good , and even charges up my mini 2 cap marx generater, which firesa good loud fat arcs. in one of the pictures i decided to dress up the hand powerd units, pvc houseing with bits of white pvc shaped to fit.
by Steven (received throught email)
Pages take forever to load?
I am aware of those access problems, I will do my best. For the time the reason isn't located. Please report here your experiences, they are helpfull.
Thanks for your patient.