...
Could be fun to bump every other tap to get a shuffle type of feel out of the taps, or add other weird complexity in combination with which tap outputs are on or muted
1) you can preselect taps with dip switches, by 10ms steps
by default i've set:
A for 10-20-30-40-50-60-70-80ms
B for 50-60-70-80-90-100-110-120ms
and C for 90-100-110-120-130-140-150-160ms
you can select any 8 timings with 10ms steps, say, 10-20-50-100-120-130-150-160ms
if you set more than 8 switches per preset, it will still work, but only first 8 are to be considered
2) ABCD outputs are presets of 8 volume sliders and 8 phase toggle switches, they are set by trimmers and dip switches on left of a back
3) 4-position dip switch near the MCU sets some extra features
- switch 1 extends delay time to 5120ms and looper buffer to 20480ms (10x times)
- switch 2 limits frequency range to 11025Hz
- combination of switches 3/4 sets the resolution:
3 off/4 off - 24bit
3 on/4 off - 12bit
3 off/4 on - 8bit
3 on/4 on - 4bit
BOM:
TIME DOMAIN PROCESSOR MODEL 288 | ||||
BILL OF MATERIALS REV 1.0 | ||||
PCB1 | ||||
RESISTORS | ||||
VALUE | DESIGNATOR | QTY | DESCRIPTION | MOUSER PART# |
10K | R6, R15 | 2 | change R6 with R7 (from 10K to 20K) change R 15 with R16(from 10K to 20K) | not needed |
20K | R7, R16 | 2 | see above | not needed |
10-100K LOG | POT1, POT3, POT4, POT5 | 4 | 16MM ANGLED | http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/ |
10-100K LOG | POT2 | 1 | 9MM | http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-9mm-right-angle-pc-mount/ |
10-100K LIN | POT6, POT7 | 2 | 16MM ANGLED | http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/ |
50K LINEAR | POT8, POT9, POT10, POT11, POT12, POT13, POT14, POT15, POT16 | 9 | 45MM TRAVEL ALPS SLIDER | FARNELL/NEWARK: RS4511150K |
MISC | ||||
VALUE | DESIGNATOR | QTY | DESCRIPTION | MOUSER PART# |
1 | BANANA JACK BLACK | 530-108-0903-1 | ||
2 | BANANA JACK RED | 530-108-0902-1 | ||
3 | BANANA JACK ORANGE | 530-108-0906-1 | ||
LED1, LED2, LED3, LED4, LED5 | 5 | RED 3MM LED | 604-WP710A10ID5V | |
J1-J18 | 18 | TINY-JAX | 502-41 | |
SPDT ON-ON | SW2, SW3, SW4, SW5, SW6, SW8, SW9, SW10, SW11, SW13, SW15, SW17, SW18 | 13 | TOGGLE SWITCH | 633-M201201 |
SPDT ON-OFF-ON | SW7, SW12 | 2 | TOGGLE SWITCH | 633-M201301 |
SPDT (ON)-OFF-(ON) | SW14 | 1 | TOGGLE SWITCH | 633-M201801 |
SPDT ON-OFF-(ON) | SW16 | 1 | TOGGLE SWITCH | 633-M201901 |
PBD1, PBD2 | 2 | PLD 20 PIN (MALE) | 517-929836-01-10-RK | |
6 | 15MM MF STANDOFF | |||
22 | BLUE SWITCH CAP | |||
2 | BLACK SWITCH CAP | |||
2 | RED SWITCH CAP | |||
PCB2 | ||||
RESISTORS | ||||
VALUE | DESIGNATOR | QTY | DESCRIPTION | MOUSER PART# |
50K | TR1-TR36 | 36 | SINGLE TURN TRIMMER | 652-3362P-1-503 |
MISC | ||||
VALUE | DESIGNATOR | QTY | DESCRIPTION | MOUSER PART# |
PLD1, PLD2 | 2 | PLD 20 PIN (FEMALE) | 579-25AA512-I/P | |
SW1 | 1 | DIP SWITCH | 774-2084 | |
SW27, SW28, SW29, SW30, SW31, SW32 | 6 | DIP SWITCH | 774-2088 | |
SW19, SW20, SW23, SW24 | 4 | DIP SWITCH | 206-125ST | |
SW21, SW22, SW25, SW26 | 4 | DIP SWITCH | 206-124 | |
STLINK | 1 | IDC-20 THRUHOLE HEADER | 571-1761681-7 | |
DIP SWITCH | 774-2084 | |||
6 | 12MM FF STANDOFF | |||
1 | POWER CONNECTOR | 587-306-50-010 | ||
1 | ST-LINK/V2 PROGRAMMER | 511-ST-LINK/V2 |