Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_24.ADF » F/Touch1
F/Touch1
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_24.ADF |
| Filename: | F/Touch1 |
| Read OK: | ✔ |
| File size: | 0640 bytes |
| Load address: | 54206576 |
| Exec address: | 6863756F |
File contents
Sensitive touch switch. Recently I needed a sensitive touch switch which would work with the slightest touch on the contacts. In addition It needed two stage action, with a quick touch a relay would turn on momentarly, with a sustained touch a second relay would go on which would stay on until the power to the circuit was disconnected. The current into the base of TR1 is limited by a large value resistor R1. TR1 is a PNP which means that the current is negative going. TR1 turns on TR2 which is a high current transistor which turns on RLA1. TR1 also charges up capacitor C1 through VR1. VR1 can be set to delay the charging of C1. When C1 is sufficiently charged it will turn on TR3 which is another PNP transistor, this turns on SCR1. The resistors between the collector and emitter of TR3 limit the current into the gate of SCR1 which is important if SCR1 is not to disintegrate. SCR1 turns on RLA2 and keeps it on. In my case the contacts of RLA2 operate the same circuit as RLA1. I would like to adapt the second stage of the corcuit so that SCR will switch off and the whole circuit will return to its 'ready' state after a fixed period variable between say 5 and 15 minutes. Hopefully some other members who are interested in electronics will send in some circuits using CAD+. If any members have an interest in electronics but may like to learn more then write in. Also remember with CAD+ since it is possable to design almost any icons to suit any application if you have a special interest which can be illustrated with diagrams then design these and send in some information.
00000000 53 65 6e 73 69 74 69 76 65 20 74 6f 75 63 68 20 |Sensitive touch | 00000010 73 77 69 74 63 68 2e 0d 0d 52 65 63 65 6e 74 6c |switch...Recentl| 00000020 79 20 49 20 6e 65 65 64 65 64 20 61 20 73 65 6e |y I needed a sen| 00000030 73 69 74 69 76 65 20 74 6f 75 63 68 20 73 77 69 |sitive touch swi| 00000040 74 63 68 20 77 68 69 63 68 20 77 6f 75 6c 64 20 |tch which would | 00000050 77 6f 72 6b 20 77 69 74 68 20 74 68 65 0d 73 6c |work with the.sl| 00000060 69 67 68 74 65 73 74 20 74 6f 75 63 68 20 6f 6e |ightest touch on| 00000070 20 74 68 65 20 63 6f 6e 74 61 63 74 73 2e 20 49 | the contacts. I| 00000080 6e 20 61 64 64 69 74 69 6f 6e 20 49 74 20 6e 65 |n addition It ne| 00000090 65 64 65 64 20 74 77 6f 20 73 74 61 67 65 20 61 |eded two stage a| 000000a0 63 74 69 6f 6e 2c 0d 77 69 74 68 20 61 20 71 75 |ction,.with a qu| 000000b0 69 63 6b 20 74 6f 75 63 68 20 61 20 72 65 6c 61 |ick touch a rela| 000000c0 79 20 77 6f 75 6c 64 20 74 75 72 6e 20 6f 6e 20 |y would turn on | 000000d0 6d 6f 6d 65 6e 74 61 72 6c 79 2c 20 77 69 74 68 |momentarly, with| 000000e0 20 61 20 73 75 73 74 61 69 6e 65 64 0d 74 6f 75 | a sustained.tou| 000000f0 63 68 20 61 20 73 65 63 6f 6e 64 20 72 65 6c 61 |ch a second rela| 00000100 79 20 77 6f 75 6c 64 20 67 6f 20 6f 6e 20 77 68 |y would go on wh| 00000110 69 63 68 20 77 6f 75 6c 64 20 73 74 61 79 20 6f |ich would stay o| 00000120 6e 20 75 6e 74 69 6c 20 74 68 65 20 70 6f 77 65 |n until the powe| 00000130 72 20 74 6f 0d 74 68 65 20 63 69 72 63 75 69 74 |r to.the circuit| 00000140 20 77 61 73 20 64 69 73 63 6f 6e 6e 65 63 74 65 | was disconnecte| 00000150 64 2e 0d 0d 54 68 65 20 63 75 72 72 65 6e 74 20 |d...The current | 00000160 69 6e 74 6f 20 74 68 65 20 62 61 73 65 20 6f 66 |into the base of| 00000170 20 54 52 31 20 69 73 20 6c 69 6d 69 74 65 64 20 | TR1 is limited | 00000180 62 79 20 61 20 6c 61 72 67 65 20 76 61 6c 75 65 |by a large value| 00000190 20 72 65 73 69 73 74 6f 72 20 52 31 2e 0d 54 52 | resistor R1..TR| 000001a0 31 20 69 73 20 61 20 50 4e 50 20 77 68 69 63 68 |1 is a PNP which| 000001b0 20 6d 65 61 6e 73 20 74 68 61 74 20 74 68 65 20 | means that the | 000001c0 63 75 72 72 65 6e 74 20 69 73 20 6e 65 67 61 74 |current is negat| 000001d0 69 76 65 20 67 6f 69 6e 67 2e 20 54 52 31 20 74 |ive going. TR1 t| 000001e0 75 72 6e 73 20 6f 6e 0d 54 52 32 20 77 68 69 63 |urns on.TR2 whic| 000001f0 68 20 69 73 20 61 20 68 69 67 68 20 63 75 72 72 |h is a high curr| 00000200 65 6e 74 20 74 72 61 6e 73 69 73 74 6f 72 20 77 |ent transistor w| 00000210 68 69 63 68 20 74 75 72 6e 73 20 6f 6e 20 52 4c |hich turns on RL| 00000220 41 31 2e 0d 0d 54 52 31 20 61 6c 73 6f 20 63 68 |A1...TR1 also ch| 00000230 61 72 67 65 73 20 75 70 20 63 61 70 61 63 69 74 |arges up capacit| 00000240 6f 72 20 43 31 20 74 68 72 6f 75 67 68 20 56 52 |or C1 through VR| 00000250 31 2e 20 56 52 31 20 63 61 6e 20 62 65 20 73 65 |1. VR1 can be se| 00000260 74 20 74 6f 20 64 65 6c 61 79 20 74 68 65 0d 63 |t to delay the.c| 00000270 68 61 72 67 69 6e 67 20 6f 66 20 43 31 2e 20 57 |harging of C1. W| 00000280 68 65 6e 20 43 31 20 69 73 20 73 75 66 66 69 63 |hen C1 is suffic| 00000290 69 65 6e 74 6c 79 20 63 68 61 72 67 65 64 20 69 |iently charged i| 000002a0 74 20 77 69 6c 6c 20 74 75 72 6e 20 6f 6e 20 54 |t will turn on T| 000002b0 52 33 20 77 68 69 63 68 0d 69 73 20 61 6e 6f 74 |R3 which.is anot| 000002c0 68 65 72 20 50 4e 50 20 74 72 61 6e 73 69 73 74 |her PNP transist| 000002d0 6f 72 2c 20 74 68 69 73 20 74 75 72 6e 73 20 6f |or, this turns o| 000002e0 6e 20 53 43 52 31 2e 20 54 68 65 20 72 65 73 69 |n SCR1. The resi| 000002f0 73 74 6f 72 73 20 62 65 74 77 65 65 6e 20 74 68 |stors between th| 00000300 65 0d 63 6f 6c 6c 65 63 74 6f 72 20 61 6e 64 20 |e.collector and | 00000310 65 6d 69 74 74 65 72 20 6f 66 20 54 52 33 20 6c |emitter of TR3 l| 00000320 69 6d 69 74 20 74 68 65 20 63 75 72 72 65 6e 74 |imit the current| 00000330 20 69 6e 74 6f 20 74 68 65 20 67 61 74 65 20 6f | into the gate o| 00000340 66 20 53 43 52 31 20 77 68 69 63 68 0d 69 73 20 |f SCR1 which.is | 00000350 69 6d 70 6f 72 74 61 6e 74 20 69 66 20 53 43 52 |important if SCR| 00000360 31 20 69 73 20 6e 6f 74 20 74 6f 20 64 69 73 69 |1 is not to disi| 00000370 6e 74 65 67 72 61 74 65 2e 20 53 43 52 31 20 74 |ntegrate. SCR1 t| 00000380 75 72 6e 73 20 6f 6e 20 52 4c 41 32 20 61 6e 64 |urns on RLA2 and| 00000390 20 6b 65 65 70 73 0d 69 74 20 6f 6e 2e 20 49 6e | keeps.it on. In| 000003a0 20 6d 79 20 63 61 73 65 20 74 68 65 20 63 6f 6e | my case the con| 000003b0 74 61 63 74 73 20 6f 66 20 52 4c 41 32 20 6f 70 |tacts of RLA2 op| 000003c0 65 72 61 74 65 20 74 68 65 20 73 61 6d 65 20 63 |erate the same c| 000003d0 69 72 63 75 69 74 20 61 73 20 52 4c 41 31 2e 0d |ircuit as RLA1..| 000003e0 0d 49 20 77 6f 75 6c 64 20 6c 69 6b 65 20 74 6f |.I would like to| 000003f0 20 61 64 61 70 74 20 74 68 65 20 73 65 63 6f 6e | adapt the secon| 00000400 64 20 73 74 61 67 65 20 6f 66 20 74 68 65 20 63 |d stage of the c| 00000410 6f 72 63 75 69 74 20 73 6f 20 74 68 61 74 20 53 |orcuit so that S| 00000420 43 52 20 77 69 6c 6c 0d 73 77 69 74 63 68 20 6f |CR will.switch o| 00000430 66 66 20 61 6e 64 20 74 68 65 20 77 68 6f 6c 65 |ff and the whole| 00000440 20 63 69 72 63 75 69 74 20 77 69 6c 6c 20 72 65 | circuit will re| 00000450 74 75 72 6e 20 74 6f 20 69 74 73 20 27 72 65 61 |turn to its 'rea| 00000460 64 79 27 20 73 74 61 74 65 20 61 66 74 65 72 20 |dy' state after | 00000470 61 0d 66 69 78 65 64 20 70 65 72 69 6f 64 20 76 |a.fixed period v| 00000480 61 72 69 61 62 6c 65 20 62 65 74 77 65 65 6e 20 |ariable between | 00000490 73 61 79 20 35 20 61 6e 64 20 31 35 20 6d 69 6e |say 5 and 15 min| 000004a0 75 74 65 73 2e 0d 0d 48 6f 70 65 66 75 6c 6c 79 |utes...Hopefully| 000004b0 20 73 6f 6d 65 20 6f 74 68 65 72 20 6d 65 6d 62 | some other memb| 000004c0 65 72 73 20 77 68 6f 20 61 72 65 20 69 6e 74 65 |ers who are inte| 000004d0 72 65 73 74 65 64 20 69 6e 20 65 6c 65 63 74 72 |rested in electr| 000004e0 6f 6e 69 63 73 20 77 69 6c 6c 20 73 65 6e 64 0d |onics will send.| 000004f0 69 6e 20 73 6f 6d 65 20 63 69 72 63 75 69 74 73 |in some circuits| 00000500 20 75 73 69 6e 67 20 43 41 44 2b 2e 20 49 66 20 | using CAD+. If | 00000510 61 6e 79 20 6d 65 6d 62 65 72 73 20 68 61 76 65 |any members have| 00000520 20 61 6e 20 69 6e 74 65 72 65 73 74 20 69 6e 0d | an interest in.| 00000530 65 6c 65 63 74 72 6f 6e 69 63 73 20 20 62 75 74 |electronics but| 00000540 20 6d 61 79 20 6c 69 6b 65 20 74 6f 20 6c 65 61 | may like to lea| 00000550 72 6e 20 6d 6f 72 65 20 74 68 65 6e 20 77 72 69 |rn more then wri| 00000560 74 65 20 69 6e 2e 20 0d 0d 41 6c 73 6f 20 72 65 |te in. ..Also re| 00000570 6d 65 6d 62 65 72 20 77 69 74 68 20 43 41 44 2b |member with CAD+| 00000580 20 73 69 6e 63 65 20 69 74 20 69 73 20 70 6f 73 | since it is pos| 00000590 73 61 62 6c 65 20 74 6f 20 64 65 73 69 67 6e 20 |sable to design | 000005a0 61 6c 6d 6f 73 74 20 61 6e 79 20 69 63 6f 6e 73 |almost any icons| 000005b0 20 74 6f 0d 73 75 69 74 20 61 6e 79 20 61 70 70 | to.suit any app| 000005c0 6c 69 63 61 74 69 6f 6e 20 69 66 20 79 6f 75 20 |lication if you | 000005d0 68 61 76 65 20 61 20 73 70 65 63 69 61 6c 20 69 |have a special i| 000005e0 6e 74 65 72 65 73 74 20 77 68 69 63 68 20 63 61 |nterest which ca| 000005f0 6e 20 62 65 0d 69 6c 6c 75 73 74 72 61 74 65 64 |n be.illustrated| 00000600 20 77 69 74 68 20 64 69 61 67 72 61 6d 73 20 74 | with diagrams t| 00000610 68 65 6e 20 64 65 73 69 67 6e 20 74 68 65 73 65 |hen design these| 00000620 20 61 6e 64 20 73 65 6e 64 20 69 6e 20 73 6f 6d | and send in som| 00000630 65 20 69 6e 66 6f 72 6d 61 74 69 6f 6e 2e 0d 0d |e information...| 00000640
F/Touch1.m0
F/Touch1.m1
F/Touch1.m2
F/Touch1.m4
F/Touch1.m5
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