Home » Archimedes archive » Acorn User » AU 1995-10.adf » !Regulars » Regulars/StarInfo/Marshall/!555/!Help
Regulars/StarInfo/Marshall/!555/!Help
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 » Archimedes archive » Acorn User » AU 1995-10.adf » !Regulars |
| Filename: | Regulars/StarInfo/Marshall/!555/!Help |
| Read OK: | ✔ |
| File size: | 0318 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
555 Timer
~~~~~~~~~
By Paul Marshall.
This program is for electronic circuit designers. It calculates the value of resistors and capacitors needed to complete a timer circuit using the famous 555 integrated circuit.
Both Astable and Monostable modes are catered for. Select the mode by clicking on the appropriate radio button. Enter the required time delay (monstable) or frequency (astable) and press return. Component values are displayed using the nearest preffered value from the 12 values per decade range.
If you enter resistor and capacitor values the frequency or time period will be displayed.
By default values are in ohms, microfarads, hertz and seconds.
Suffixes M or K may be used for resistor values
u (for �) or n for capacitors
u or m for time delay. 00000000 35 35 35 20 54 69 6d 65 72 0a 7e 7e 7e 7e 7e 7e |555 Timer.~~~~~~| 00000010 7e 7e 7e 0a 0a 42 79 20 50 61 75 6c 20 4d 61 72 |~~~..By Paul Mar| 00000020 73 68 61 6c 6c 2e 0a 0a 54 68 69 73 20 70 72 6f |shall...This pro| 00000030 67 72 61 6d 20 69 73 20 66 6f 72 20 65 6c 65 63 |gram is for elec| 00000040 74 72 6f 6e 69 63 20 63 69 72 63 75 69 74 20 64 |tronic circuit d| 00000050 65 73 69 67 6e 65 72 73 2e 20 49 74 20 63 61 6c |esigners. It cal| 00000060 63 75 6c 61 74 65 73 20 74 68 65 20 76 61 6c 75 |culates the valu| 00000070 65 20 6f 66 20 72 65 73 69 73 74 6f 72 73 20 61 |e of resistors a| 00000080 6e 64 20 63 61 70 61 63 69 74 6f 72 73 20 6e 65 |nd capacitors ne| 00000090 65 64 65 64 20 74 6f 20 63 6f 6d 70 6c 65 74 65 |eded to complete| 000000a0 20 61 20 74 69 6d 65 72 20 63 69 72 63 75 69 74 | a timer circuit| 000000b0 20 75 73 69 6e 67 20 74 68 65 20 66 61 6d 6f 75 | using the famou| 000000c0 73 20 35 35 35 20 69 6e 74 65 67 72 61 74 65 64 |s 555 integrated| 000000d0 20 63 69 72 63 75 69 74 2e 0a 0a 42 6f 74 68 20 | circuit...Both | 000000e0 41 73 74 61 62 6c 65 20 61 6e 64 20 4d 6f 6e 6f |Astable and Mono| 000000f0 73 74 61 62 6c 65 20 6d 6f 64 65 73 20 61 72 65 |stable modes are| 00000100 20 63 61 74 65 72 65 64 20 66 6f 72 2e 20 53 65 | catered for. Se| 00000110 6c 65 63 74 20 74 68 65 20 6d 6f 64 65 20 62 79 |lect the mode by| 00000120 20 63 6c 69 63 6b 69 6e 67 20 6f 6e 20 74 68 65 | clicking on the| 00000130 20 61 70 70 72 6f 70 72 69 61 74 65 20 72 61 64 | appropriate rad| 00000140 69 6f 20 62 75 74 74 6f 6e 2e 20 45 6e 74 65 72 |io button. Enter| 00000150 20 74 68 65 20 72 65 71 75 69 72 65 64 20 74 69 | the required ti| 00000160 6d 65 20 64 65 6c 61 79 20 28 6d 6f 6e 73 74 61 |me delay (monsta| 00000170 62 6c 65 29 20 6f 72 20 66 72 65 71 75 65 6e 63 |ble) or frequenc| 00000180 79 20 28 61 73 74 61 62 6c 65 29 20 61 6e 64 20 |y (astable) and | 00000190 70 72 65 73 73 20 72 65 74 75 72 6e 2e 20 43 6f |press return. Co| 000001a0 6d 70 6f 6e 65 6e 74 20 76 61 6c 75 65 73 20 61 |mponent values a| 000001b0 72 65 20 64 69 73 70 6c 61 79 65 64 20 75 73 69 |re displayed usi| 000001c0 6e 67 20 74 68 65 20 6e 65 61 72 65 73 74 20 70 |ng the nearest p| 000001d0 72 65 66 66 65 72 65 64 20 76 61 6c 75 65 20 66 |reffered value f| 000001e0 72 6f 6d 20 74 68 65 20 31 32 20 76 61 6c 75 65 |rom the 12 value| 000001f0 73 20 70 65 72 20 64 65 63 61 64 65 20 72 61 6e |s per decade ran| 00000200 67 65 2e 0a 0a 49 66 20 79 6f 75 20 65 6e 74 65 |ge...If you ente| 00000210 72 20 72 65 73 69 73 74 6f 72 20 61 6e 64 20 63 |r resistor and c| 00000220 61 70 61 63 69 74 6f 72 20 76 61 6c 75 65 73 20 |apacitor values | 00000230 74 68 65 20 66 72 65 71 75 65 6e 63 79 20 6f 72 |the frequency or| 00000240 20 74 69 6d 65 20 70 65 72 69 6f 64 20 77 69 6c | time period wil| 00000250 6c 20 62 65 20 64 69 73 70 6c 61 79 65 64 2e 0a |l be displayed..| 00000260 0a 42 79 20 64 65 66 61 75 6c 74 20 76 61 6c 75 |.By default valu| 00000270 65 73 20 61 72 65 20 69 6e 20 6f 68 6d 73 2c 20 |es are in ohms, | 00000280 6d 69 63 72 6f 66 61 72 61 64 73 2c 20 68 65 72 |microfarads, her| 00000290 74 7a 20 61 6e 64 20 73 65 63 6f 6e 64 73 2e 0a |tz and seconds..| 000002a0 53 75 66 66 69 78 65 73 20 4d 20 6f 72 20 4b 20 |Suffixes M or K | 000002b0 6d 61 79 20 62 65 20 75 73 65 64 20 66 6f 72 20 |may be used for | 000002c0 72 65 73 69 73 74 6f 72 20 76 61 6c 75 65 73 0a |resistor values.| 000002d0 20 20 20 20 20 20 20 20 20 75 20 28 66 6f 72 20 | u (for | 000002e0 b5 29 20 6f 72 20 6e 20 66 6f 72 20 63 61 70 61 |.) or n for capa| 000002f0 63 69 74 6f 72 73 0a 20 20 20 20 20 20 20 20 20 |citors. | 00000300 75 20 6f 72 20 6d 20 66 6f 72 20 74 69 6d 65 20 |u or m for time | 00000310 64 65 6c 61 79 2e 20 20 |delay. | 00000318
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