help, tungkol po sa microwave oven

[elexxman]

Mga ate, kuya, pwede po panhingi ng mga advice tungol sa microwave oven? kasi balak ko po maglagay ng ilang mga butas sa microwave oven, para mo malagyan ng mga tubes, para po mga papasok na gamit, tapos heheat, may mga advise po ba kayo kung paano ko gagawin to?

isa ko pa pong problema, gusto ko kasi maglagay ng temperature sensor, preferable themocouple siguro, para yung hiniheat ko, mareregulate ko yung temperature, gagawa kami ng control system para macontrol din yung power sa loob ng microwave, ano pong sensor pwede ko lagay sa loob ng microwave oven? pano ko po to pwede gawin?

Salamat po,(",)

[insomartin]

what?!!?!? anong heheat mo!?

[elexxman]

kasi gagawin namin is isang automated na process ng extraction, sa tube dapat kasi lalabas yung lalabas na extacted oil, yung input process sana gusto din namin para ganun, pero needs bigger hole, may paraan ba o any precaution bago gawin to?

[Ate Shey]

you should never mess with a microwave oven.. konting pagkakamali lang diyan at ma expose ka sa microwave tiyak mababaog ka.. it could also cause permanent blindness or in worst cases, it could boil your brain from the inside out..

magnetrons are not supposed to be handled by amateurs, students and hobbyists.. it should only be handled by qualified technicians.. hindi ninyo alam kung gaano ka delikado yang mga ideya ninyong yan..

have you read microwave safety and hazards?.. alam niyo ba kung ilan ang power density na safe?.. etc.. etc.. if i were you, i would never mess with a magnetrons in the hundreds to thousands of watts rating..

[rurikdgreat]

yes magnetron are very dangerous. you should not energized it without or outside its metal shield/casing or else the microwave could escape and enter your body. put a crumple aluminum foil inside and turn it on, see how it will burn and explode like firecrackers (do at your own risk)     

[Ate Shey]

i think project yata nila na i-control ang heat sa loob ng microwave oven by putting temperature sensors and varying the power of the magnetron..

obviously, a very very dangerous project.. i would never mess with a microwave oven knowing how it could do permanent damage to any part of your body..

seriously, if i were the thread starter i would change my project right away.. i would never risk my reproductive capability and my legacy over a grade of B or B+ .. it is not worth it.. may B+ ka nga eh baog ka naman..

[rurikdgreat]

i don't know kung pwede na i-vary ang output power ng magnetron. most microwave oven vary its heat output by varying its on-time and off-time cycle.

tama ka boss, napaka delikado talaga ng power ng magnetron. i think its better to change their project than taking the risk na mabaog.    baka baog na may topak pa tapos B- pa grade  

[Ate Shey]

it is not that i want to discourage our students na mag experiment sa microwave oven but this project is simply too risky, and for what gains? ano naman makukuha mo after this project? grade lang?..

if they are not careful enough, millions will die, millions of sperm cell that is he he he he..

[rurikdgreat]

 

[elexxman]

kahit yung pagcontrol na lang nung power output para mavary yung heat, plano kasi namin gamitin is inverter microwave, pwede ba kami gamit ng external na controller to do that?

[Ate Shey]

i am not sure hindi kasi ako familiar sa design ng power supply unit ng microwave.. sa pagkaka-alam ko it uses a 2 Killowatt transformer..

[elexxman]

ang laki pala ng wattage, may alam po kayo tungkol sa inverter na microwave oven?..(",)

[insomartin]

the best is i-analyze mo yung loob nang microwave oven, and pagaralan mo yung safety mechanism na inemplement nang manufacturer's para makapasa sa standards.

mahirap mag explain lalo nang hindi mo nakikita in actual. punta ka lang sa mga junkshops malamang maraming microwave ovens. biktima nang ondoy.

[elexxman]

ang gagawin ko kasi talaga is automated na process kung saan papasok mga raw materials, tapos yung maeextract na oil is lalabas through a tube, gusto ko lang po malaman kung may mga precautions o safety measure akong dapat gawin? or kung merong ways na pwede ako magbutas na magiging safe pa din?

yung temperature sensor naman po, gagamitin sana namin para maasure yung naiinit sa loob, kasi part po ng consideration ng extraction is yung temperature is kept stable and constant, kasi kung sa wattage lang po kasi ako dedepende na walang feedback, baka di maganda yung maging resulta ng oil na lalabas... can anyone help?

thanks,(",)

salamat po sa mga nagreply kanina, need ko kasi gawan to ng paraan e, salamat po,(",)

[insomartin]

i think IR ang solution mo dito. i think babahain nang RF yung thermocouple mo... unless after nang process ka kukuha nang samples ok na yung type k's  gamit ka nang temp controller. sa egizmo madaming automation parts dun.

[marcelino]

question, bakit microwave oven pa ang gagamitin ninyo?

Did you know that, di naman even ang heat sa loob ng microwave oven, kaya nga may rotating plate kasi kung hindi parang may alon lang dyan na naiinit....

mas maganda pa siguro kung electric oven nalang... wag naman yung oven toaster. may malalaki din na oven (used for baking) na electricity ang power. we have one at home. nakapagbake na din naman ako ng cookies at nakapagroast na ng chicken. may rotating shaft for chicken and meat. Nwei, kung magmomodify kayo, eto nalang. yung controller nung nasa bahay ay rotatary thermostat lamang.... you can replace it with any sensor you want for digital interfacing.

however, yung particular oven na sinasabi ko, can only ready up to 255 deg centigrade lang. perhaps get the laboratory grade. we also have one sa laboratory ng civil engineering students. ginagamit nila pang tuyo ng lupa for their soil experiments. Digital controls na nga yun. so controlled na ang temperature nun.

And lastly, there are ovens in the market that even have exhausts to facilitate the humidity as well. Just like oven produced by this: http://www.shellab.com/ap-ovens.php (funny, sheldon manufacuring daw. really sounds nerdy).  

Browse ka nalang sa site nila!

[elexxman]

ah, di naman po sa heating yun, kundi sa microwave energy na magagamit for extraction, method po yun na ginagamit ng mga chem eng students, gagawin ko po is to automate it,

kung inverter type po na oven gagamitin namin, masosolve po part nung distribution ng microwave energy, kasi di po siya tulad ng PWM na transformer na gamit na microwave energy, sadly nga lang po na walang ganun na benta sa pilipinas...

pano po yung rotary thermostat? sorry po, di ko po ganun kaalam yung idea po... 

mga digital po na microwave ovens controlled na po ba mga temperature?..

salamat po mga ate at kuya,(",)