0.25usec

1. 8 6 1usec 1 16 S S 11 13 11 10 9 8 3 1 7x Q Q + 1M 9668 ULN2004A MC1416L equivalent 16 1 2 9 9 12 5 2 D Qn D Qn 4MHz R 2k2 R 13 12 1 10 4 4013 8 4069 100p 22p 0.25usec time base & display mux 6 10usec 14 100usec 6 1msec 14 10msec 6 100msec 14 1sec 1 9 1 9 1 9 5 13 5 13 5 13 4 12 4 12 4 12 2 10 2 10 2 10 3 11 3 11 3 11 R R R R R R 4518 4518 4518 RST-TB 7 15 7 15 7 15 + + 1 16 13 680W 100ms Yo Y1 Y2 Y3 Y4 Y5 Y6 Y7 1 dot-mux 9 a b c d e f g a b c d e f g LD BL PH D C B A 2 15 14 1s 7 10 DPn D1 D2 D3 D4 3 14 dp c1 c2 c3 c4 15 1ms 6 11 3 4 13 13 12 12 10ms TB 2 5 12 3 1 Z 13 4 digit display common cathode C N T R D C B A 4 6 11 14 5 15 7 7 10 2 14 15 10 8 9 4 R O 330W 25.6mA vee 4017 9668 ULN2004A MC1416L 7 4051 c1 c2 c3 c4 dp 4543

2. RST CLK 4 12 13 3 4 12 13 3 4 12 13 3 4 12 13 3 11 10 9 P0P1P2P3 P0P1P2P3 P0P1P2P3 P0P1P2P3 A0A1A2 15 1 15 1 15 1 15 1 PL TCn PL TCn PL TCn PL TCn E 7 7 7 7 5 5 5 5 4051 CE BIN/DECn UP/DNn 4029 CE BIN/DECn UP/DNn 4029 CE BIN/DECn UP/DNn 4029 CE BIN/DECn UP/DNn 4029 DP1n DP2n DP3n DP4n 9 9 9 9 13 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 10 10 10 10 + + + 14 + 15 O0O1O2O3 O0O1O2O3 O0O1O2O3 O0O1O2O3 DPn 3 12 Z 6 11 14 2 6 11 14 2 6 11 14 2 6 11 14 2 Counter 1 5 15 1 10 9 15 1 10 9 15 1 10 9 15 1 10 9 2 P0P1P2P3 P0P1P2P3 P0P1P2P3 P0P1P2P3 14 14 14 14 4 R U D PL R U D PL R U D PL R U D PL VEE 5 5 5 5 12 12 12 12 TCu TCd TCu TCd TCu TCd TCu TCd 40193 40193 40193 40193 13 13 13 13 4 4 4 4 + + + + dot-(dp)mux 7 11 11 11 11 4532 O0O1O2O3 O0O1O2O3 O0O1O2O3 O0O1O2O3 5 + E 3 2 6 7 3 2 6 7 3 2 6 7 3 2 6 7 Latch 4 6 I7 I6 I5 I4 I3 I2 I1 I0 O2 O1 O0 3 7 LSB LEn MSB 2 9 1 12 14 15 11 1 5 2 4 12 14 15 11 1 5 2 4 D4 D3 D2 D1 13 Mux 0A1A2A3A 0B1B2B3B 0A1A2A3A 0B1B2B3B 12 6 6 COUNTER E A0 A1 E A0 A1 Eo GS 15 4052 4052 11 10 10 14 10 9 9 ZA ZBVEE ZA ZBVEE 13 3 7 13 3 7 Dec -> Bin B A D C

3. + 10kW INPUT clock gate circuit 1usec 9 40175 (CNTR OUT) + 1 R reset & latch circuit 6 8 TB & & & & & & & & & & R-TBS S S TBP 11 13 3 1 Q Q 15 O3 O3n O2 O2n O1 O1n O0 O0n 4013 14 4069 9 12 5 2 D Qn Qn 13 D D3 D2 D1 D0 10 8 R TB1 10 5 6 R 12 11 9 4 10 RSTn RST RST-TB 5 7 TBP 4 4011 6 1 2 TB2 3 12 CLK 2 11 3 5 LEn + 13 4 RST 4011 TB2 6 >10kL,<10kH 6 S RS1 3 1 Q >10kH 13 11 DP1n 2 12 5 Qn D R TBS9 >100kL 5 decimal point decoder & latch 4 DP2n 4 6 >100kH TBS8 8 1 S 11 13 RS0 DP3n >1ML Q 3 2 TBS7 12 >1MH 8 11 9 12 Qn D 10 13 8 R DP4n 9 10 4011 10 9 4013 4011

4. 4013 4013 TBS2 8 8 6 6 6 14 100usec TBS1 S S S S 11 13 11 13 0.25usec 3 1 1 9 1 3 5 13 Q Q Q Q TBS3 4 12 2 10 3 4 9 12 9 12 5 2 2 Qn 5 D Qn D Qn D Qn 3 11 D R R R R R R 4518 4069UB 10 10 4 7 15 4 R-TBS 1up 10up 100up 6 6 6 time base select circuit (frequency detector) S S S 3 1 3 1 3 1 Q Q Q 5 2 5 2 5 2 D Qn D Qn D Qn R R R 4 4 4 4013 4013 4013 TBS4 TBS5 TBS6 8 8 8 S S S >10kL,<10kH 11 13 11 13 11 13 >1ML >100kL Q Q Q 9 12 9 12 9 12 >1MH >100kH >10kH D Qn D Qn D Qn R R R 10 10 10