/KicadJE_PE_1978-01_Drum

Based on https://worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1978-01.pdf

KicadJE_PE_1978-01_Drum

Based on https://worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1978-01.pdf

Purpose

Board 1 - Drum module

Adjustment:
Mix of snare amt

Gate Input:
TTL Square

Output Audio:
+/- 10V AC coupled

Board 2 - Breadboard helper

Testing out text prints

Adjustment:
100k Pot to pinheader
Push button to pinheader

Input/Output:
3,5mm jack to pinheader
+-12V from Eurorack 10pin IDC to breadboard pinheaders

Board 3 - Desktop PDU for Eurojack

Banana jack in
16 pin Euro power out

Status - Being assembled

Initial

Stage Detail Status
create material sch  done
pcb  done
gerber  done
production delivered
produced delivered
delivered ok

Preliminary validation

Test Detail Status
Initial Inspection PDU ok mechanical
Initial Inspection BB Helper ok mechanical - Solder-mask-expansion on copper looks best - better than silk
Initial Inspection Drum Module
Initial Technical Test Board 1
Initial Product Test Board1

Secondary validation

Test Detail Status
Product Test 1
Quality 1
Long Term Product Test
Power Draw

Errata

Errata - BB Power

Errata - PDU

R405 not connected to GND

Issues and Notes

Pictures

back

Schematic

Sch 1

Analysis

Diag 1

https://worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1978-01.pdf

Prototype