UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Film Resistors: Coated Core and a Cut Helix
Most axial-leaded resistors are film resistors. A thin resistive film is put on an insulating core, and a helix is cut through it, turning the film into a long, narrow path; the length of that path sets the resistance. Carbon film resistors use a film of carbon and cover about 1 ohm to 10 megohms at 0.125–5 W. Metal film resistors are usually coated with nickel chromium, applied for example by sputtering in a vacuum; cut the same way, they reach tolerances of 0.5–2 % and temperature coefficients of about 50–100 ppm/K. The value is marked on the body with coloured bands, the electronic colour code.
Hejuru
Factory process
Amabwiriza
1
1
Coat the cores
Coat the cores
Deposit the resistive film on the insulating cores: carbon for carbon-film parts, nickel chromium (for example by sputtering) for metal-film parts.
Ibikoresho by'iyi ntambwe:
Inkingi idatwara amashanyarazi ya résistance1 as required
Agashashi ka karubone1 as required
Agashashi ka nickel-chrome1 as requiredIbikoresho bikenewe:
Icyumba cya sputtering kitarimo umwuka2
2
Cut the helix and fit leads
Cut the helix and fit leads
Cut a helix through the film (the longer and narrower the path, the higher the resistance) and fit end caps with axial leads.
Ibikoresho by'iyi ntambwe:
Imipfundikizo y'impera za résistance ifite amaguru1 as requiredIbikoresho bikenewe:
Imashini ikata umurongo uzenguruka kuri résistance3
3
Mark
Mark
Paint the colour bands that give the value and tolerance.
Ibikoresho by'iyi ntambwe:
Irangi ry'imirongo y'amabara1 as requiredIbikoresho
5- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
Ibikoresho bikenewe
2Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
CC0 Umurenge rusange
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