EPROM light sequencer

62 EPROM light sequencer 12 V The circuit described here is an eight channel light sequencer. The information for each channel (on or off) is contained in a 2708 type EPROM (these are coming down in price every day!). There are therefore 1024 steps before the "program" repeats itself. It is possible to program the EPROM your- self if you have access to an EPROM programming device. Otherwise you can use an EPROM which has already been programmed for a computer. This will cause the eight lamps to turn on and off in the D3 .- D6 = 1N4001 633 CO 21.2 10V Tri1 Tr18 = TIC 2060 Al A2 9 N1 N4 = IC4 = 4093 5V AO Al A2 04 AA A5.6.0 A] AB A9 5V Vcc 5V -1r - 1211311 411511611 I__ _____ _ _ RP ..: :I; 2 70 k A17 .- AU. 220 R ii 5V 12 S"1313 IC6 v, r -1 T -1 r - 1 1 t, il.;s EPROM 2708 "dee 5 `,4"... a 00 01 02 03 04 05 06 G7 i I 1- 1 711 III. ti. il it 1.III1, 1il It11 11iIIII I 1 1II 1I ii 11 I,li 1 II1tti Is I ll I I 1 1 I I , I Ii IIIIIII II IIIII I 11I1 I1 II 1I A it 111 i II I III Ps I I ...