ASM301 - ADSR Envelope Generator
ELBY Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
2 of 2
Construction of the
requires the assembly of 2 separate boards:-
Column 1 - Panther Pot PCB (
)
Column 2 - ASM301 Board PCB (
Constructors should refer to the
for any specific
comments regarding the board assemblies, the
for the
current value of all components and
for
general pcb assembly guidelines.
1. Fit all components to the boards following normal assembly
guidelines except D104, D105 and D108
2. Mount the 2 sub-assemblies to the front panel securing using the
supplied nuts.
3. Form the legs for the 3 LEDs and mount and solder in to place
Calibration
1. Monitor TP1 (On PCB V0.2 there is an exposed pad on P103)
2. Adjust P103 for 10.0V
3. Set panel controls, [DECAY] and [RELEASE] to minimum,
[ATTACK] to '2' and [SUSTAIN] to maximum
4. Adjust P106 to its mid-position
5. Monitor the [ADSR] output
6. Use the [MANUAL] button to generate an envelope
7. The envelope will appear somewhat similar to that in
Figure 1
where it has a step in the rising edge (area in circle)
8. Turn P106 clockwise 1-turn
9. Repeat steps (6) through to (8) until the step is removed as shown
in
Figure 2
Figure 1
Figure 2
