Schematic
Full circuit schematic for the Heathkit EC-1 Educational Analog Computer, labeled as page 38 of the assembly/instruction manual. The diagram covers two vacuum-tube operational amplifiers, a repetitive oscillator, coefficient potentiometers, meter junction circuitry, relay binding posts, and the complete AC power supply with transformer and rectifier stages.
4lNdWOD IWNOI!ILVONG t-03 TAGOW JILVWAHOS (HONLISOd 440) mS SONVY BILAN “KIdans WaAMOd 2HL JO TAL HLA OgunsvaW aHV NOLLIONOD THe 4. OL AD9USae JIL OTUASYGN SIDVLIOA T1Y did wig aay SAVAYACUIN NT SBKYLID¥AVS TIY Ww > poo'ge! = OOO HALIM ‘SHO WY FONVERIESH THY uyay SIL WOU ORAGIA SEROLING T1Y “aNd =NO CH anv soma @) » § @ ma (ee aA + 5 SHALSWOLINBIOd L311 44909 RES ef 3 _ cee oor! Aoi) At = vasa re 1% uIM FHWa bey Seed S eed TBNY¥d NO SLSOd (uowsod 13say) SNIGNig AY Tay AS ona . AWNO!LVUIdO a OSE " ° & Fas ia] O28 ) O--7 a rs Hz im ! t MAK dHM 9 ® j OH INOS AW Jive J NOWWATES -@— wid faau { oan te 2 Rus ‘ 9 | wos &) meu Soawz'2 © S574 @ 4 omy eves > 5 | ved 4 noge) woag Wvae 4o MORO UvaY + Soo i yn 30 uvau @ 40 LNOUs @ Ot j | 6) sree o3l* DYADSI. ° { 0 so" © re _ | ag [nove | We o sid BELG aay a “~¢@ ° iF co | wig Oe | Aooe| fr] Ace { ie Ww zHg21 2A ase | (3) 40 wren 2WA 0G: HOLIAS OF ! Aooz (£ NOILOINAA d3LaW c) Pix og @ Eg aay 80 oe fe € oe ? Of ° eed easy gf . aa - SUaLIIGWY OL __ wa HOLY TNDSO FALL Laday ® 3d > eh O3Mt 40 Soo — VALI PA LJ 3) r oe ca 2vA08 | a) TaNWd NO HOLIMS of BONV WE WALA dn aNd NO Pp S1SOd ONIGNIG ? NOLLIGNOD “TWILIND Gage Wve 4 + aa ma AQST— s e A00Z, Aoge] 2 + Orit WH Ob emt ort 5 ~~ ‘DyA o0z 14 Ph me -j—} — — — | Clo or | — bi | aes vb mt HAL yoo 2 WOO ae = 3 | a rou + @ wows = aonvwa S oes = * | vaiaridey Son = He-3N] tof 8e-3N Me | zie OBA z2 | BZ AANA WWW —_ = | vet | = eus wes = 3 soba) ~ 4 ay | , | 91A HONOWHL OTA | wet | = LW x8 HONOUHL ov@ SYRIA “= On ang woge Se | fAnaZ Howes | wove Saw! wars = zw a | YAGSE | ovnnee so —-— —bt 4H H4—4 1 -—-L-b i i URIS TVNOLWuad0 6H UBtIdHY TWNOLIWEadO 4 Tea v.70] a ANaNY ts to asnd ve 7 Au08- 0S OYA BI Page 38