monoman

yes, your completely right elix, thery're really expensive at the moment, ive taken to disassembling webcams, salvaging both the electronics and the included optical assembly, even though the ones i have been able to get hold of are fairly crap quality. ::) what experience do you have in this area? (particularly in acquiring these chips) I would really appreciate any more info that you could share with me, thanks, monoman

hi, ive been searching the net for ages, for a good chip, and this is the closest i have got to what i need; TC246RGB-B0 on Texas instruments website: http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=373&uiTemplateId=NODE_STRY_PGE_T and the datasheet: http://focus.ti.com/lit/ds/symlink/tc246rgb-b0.pdf however, on the first link (above) the chip's status is 'ACTIVE', but when you click on it, there is no pricing information, or any option to buy it, or to send for a sample. these kind of chips have turned out to be particularly hard to find on the net, and are not stocked by any electronics stores that i know of on the high street. please if anyone has looked for any image sensors before with any success, point me in the right direction ??? (ideally, it would be good to get a sample of a handful of these devices, that are as close to my specs as possible, without having to buy them in multiples of 250+ at

hi, the datasheet is a paper copy that came in the bag, and I have no scanner to show it to you, but to be honest that was the only thing i didnt understand. (it is just a list of what is included listing part numbers, type of diode, and voltage/wattage, not a detailed datasheet of an individual diode) I pretty much guessed what Z-diode stood for too. 3 types of diode included with this name: SPP100, SY625, SY400 i searched for SY400, and got a list of toilet roll holders! no luck with the other two either thanks for the help i couldnt find a decent translator online, that one seems quite good

hi, anyone speak German here? what is 'Gleichrichterdiode' I bought a multipack, of diodes and got a german datasheet. no online translators translate it, think it might be rectifier diode? thanks :)

EDIT: im probably going to use CCD to be honest, because they have higher sensitivity, higher quality images, lower-noise, and generally more pixels (not a really important factor for me, as long as it is above 2 megapixels) even though CMOS sensors, can consume about 100 times less power, and are cheaper too. (not really too sure about frames per second, but i think that CMOS is faster, because each pixel is individually read, rather than shifting the charge; agian not too important as long as it is above 30fps) so please can you recommend a CCD to use that fits my specs. thank you

hi, dont know if this in the right forum: for a low end image sensor (between 2 to 3 megapixels) in a colour video application, can anyone recommend the best sensor to use (CCD or CMOS) when i say 'best', i need these specs: >smallest (dimensions, and weight) >2 to 3 megapixels >low noise, high sensitivity >colour filter >fastest possible fps rate (must be 30fps or more) >no image burn-in, or distortion, or delay. >lowest possible power consumption. please post if you have any ideas for the best chip for me to use, thanks.

hi, platinum is the best material to use for the electrode as its an inert metal, but obviously, this is too expensive for a homemade plant. as long as this black 'stuff' is not reacting due to the electrolysis, and causing too much unwanted, impure gas to be formed along with the hydrogen then its probably good to use if its giving you a good amount of bubbles. what diodes did you use?, monoman:)

ok thanks, just wanted to be sure that i had the basic design right before i go further. im gonna try and salvage some graphite electrodes too and clean em up:) ill get back to you when i have built something worth posting

how did you set up the actual electrolysis chamber? This design is pretty good i think reaction_chamber.zip

hi steven, Ive read an article about this experiment, where the woman suggests using graphite electrodes that she has salvaged from some kind of battery. perhaps this material is less seceptible to corrosion from thie mixture. I think adding salt to the water does not increase the yeild of gas as i said before, but actually increases the rate at which gas is released: when the salty water is electrolysed, chlorine gas will be given out from the same terminal as the oxygen (anode), while the sodium will react with the surrounding water, giving off more hydrogen, and forming sodium hydroxide as a solute. therefore, the hydrogen gas given out at the negative terminal is still pure and is given out at a faster rate, but some hydrogen (potential yeild) will have been locked up within the sodium hydroxide. the addition of sodium hydroxide through this reaction, means that the solution becomes progressively more basic through the course of electrolysis. Basic solutions can be known to attack/corrode certain metals, and in this case it has probably attacked some element within the stainless steel, producing that black stuff you mentioned as a product (perhaps a metal oxide). What I have made so far is really not worth posting:) I will post a few designs I have made though once i get them onto the PC, regards, monoman

hi steven, ive started building the main electrolysis chamber out of some plastic piping:) I found a useful fact: adding salt to the water improves its conductivity, and increases the yeild of gas, monoman

Hi steven, Thank you for all of this, much appreciated, there is more than enough info to get started with, please if you add/change anythink else, keep posted, monoman

thanks alot for those schematics! can you provide me with the information about how to set up the actual chambers, e.g. where the water goes in, where the hydrogen gas comes out, and all the chambers in between, along with the process of each one? this is alot to ask but maybe you could direct me to this information? (some diagrams would be really helpful too ;D) I will really be grateful, thanks, monoman :)

hi, this project is brilliant!! I never would have thought of using an arrangement like this in the house, supplying you with hydrogen gas to burn. I could use this in my boiler and hob, maybe save some on the gas bills! :o do you mind posting the circuit schematics for it, and any other important mechanical schematics that you have made? I would really appreciate this, monoman

thank you for the very quick reply, but it is the energy of the spark that i am trying to calculate.