.PS # Timer.m4 cct_init ifpostscript(,latexcommand({\small\sf)) define(`ic555',`[Chip: box ht boxwid wid boxwid "555" P7: "7" ljust at 1/6 P6: "6" ljust at 1/2 P2: "2" ljust at 5/6 P4: "4" below at 1/3 P8: "8" below at 2/3 P3: "3" rjust at Chip.e P1: "1" above at Chip.s ]') Timer: [ define(`elen_',`linewid') Vs: dot down_ variable(`resistor(,,E); llabel(,\SI{1}{M})') resistor(,,E); llabel(,\SI{100}{\kilo{}}) capacitor(,E); llabel(\SI{220}{\micro{}}) Zero: dot dot(at Vs+(elen_*4/3,0)) resistor(,,E); llabel(,\SI{33}{\kilo{}}) line to (Here,Zero) chop 0 chop elen_ C2: capacitor; llabel(\SI{0.1}{\micro{}}) dot IC1: ic555 with .P7 at C2.start + (elen_,0) line from IC1.P4 to (IC1.P4,Vs); dot line from IC1.P8 to (IC1.P8,Vs); dot line from IC1.P1 to (IC1.P1,Zero); dot line from IC1.P2 to (C2,IC1.P2); dot crossover(from IC1.P7 to (Zero,IC1.P7),R,C2); dot line from IC1.P6 left elen_/2 then down IC1.P6.y-IC1.P7.y; dot line from IC1.P3 right elen_*2/3 R: dot line right_ elen_/3 B: buzzer(,,C) with .In3 at Here line from B.In1 to (R,B.In1) reversed(`diode',to (Here,Vs),LE); "red" at last line.c+(elen_/2,0) resistor(down_ elen_ from R,,E); llabel(,\num{470}) diode(to (Here,Zero),LE); {"green" at last line.c+(elen_*2/3,0)} line to Zero chop 0 chop -elen_ line up_ (Vs.y-Here.y)/3 battery(up_ (Vs.y-Here.y)/3); rlabel(,,\SI{9}{V}) switch(to (Here,Vs),,D) line to (R,Vs) ] Ex01: [ # ex01.m4 linewid = linewid*1.5 # let's make the circuit elements bigger than usual define(`elen_',linewid) # but not longer del = elen_/4 # a spacing parameter Vin: source(up_ elen_ + 2*del); llabel(-,v_s,+) switch(right_ elen_,,C); rlabel(,t = 0,) resistor; llabel(,47\`,'\Omega,); b_current(i_R\strut,above rjust) line right_ elen_/2 then down_ del parallel_(`inductor(,W); llabel(,L,); b_current(\>`'i_L)', `capacitor(,C); rlabel(+,v_C,-); llabel(,,\;C)') line to (Here,Vin.start) then to Vin.start arcd(last []+(4pt__,0),del,30,330) <- ; "$i_2$" at last arc arcd(Vin.c+(4*del,0),2*del,30,330) <- ; "$i_1$" at last arc ] with .sw at Timer.se+(0.5,0) ifpostscript(,latexcommand(}%)) .PE