The Postman EG v1.0_BOM
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The Postman Envelope Generator v1.0 Bill of Materials
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Part QtyDesignatorsNote/s
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Included in the kits (includes complex version parts). You must find your own pots and jacks!
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TL074 Dual Operational Amplifier1IC1
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TL072 Dual Operational Amplifier1IC4
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TLC274 Quad Operational Amplifier2IC2, IC3MAKE SURE YOU USE SINGLE SUPPLY OPAMPS FOR THESE TWO!
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Note: TLC279 is also a possible substitute. Pretty much any single supply quad opamp will work just fine!
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14 pin DIP IC Socket3IC2, IC3, IC1
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8 pin DIP IC Socket1IC4
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.1uF Ceramic Disc Capacitor4C2, C4, C7, C11 5mm lead spacing
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10uF Electrolytic Capacitor2C3, C6 2.54mm lead spacing
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4.7uF Electrolytic Capacitor4C1, C8, C9, C102.54mm lead spacing -- these are the timing caps for the A/R cycles. Feel free to change the value if 4.7uF doesn't suit you.
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Note: All capacitors should be 25V rating or greater
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1N914 Small Signal Diode12All diodes
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Note: Or equivalent (ie: 1N4148)
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1k Resistor8R7, R16, R22, R25, R26, R30, R39, R40
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100k Resistor18R3, R5, R9, R10, R11, R13, R18, R19, R20, R24, R27, R32, R33, R34, R35, R36, R37, R38
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10k Resistor8R4, R8, R12, R14, R17, R23, R28, R31
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12k Resistor1R2
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68k Resistor1R1
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75R Resistor4R6, R15, R21, R29THE KITS HAVE 82R RESISTORS! This is normal. They'll work just fine as well. So will 100R.
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5mm LED (ultra-bright)4LED1-4THESE SHOULD BE "ULTRABRIGHT" LEDs. Normal LEDs might not work without a buffer!!!
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SPDT toggle switch (panel mount)2Mix select switches (SW.1, SW.3)
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Not included in the kits (due to format/build specifics):
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100k linear potentiometer (panel mount)2Mix Level Controls (LVL.1/LVL.3)
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1M linear potentiometer (panel mount)8Attack/Release Controls
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Jacks (to match your format)12EG1-4 Out, Gates1-4 in, Outs: 1-, 1+2 mix, 3-, 3+4 mix1/4", banana, 3.5mm, etc.!
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Knobs9Clock Frequency, CV1-8<= 14mm diameter, set-screw style (Davies 1900H seem to work well!)
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Wire xxxx26AWG or so is recommended
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2.8mm machine screw, nuts + PCB standoffs4xxFor fixing the PCB to the panel/l-bracket
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Power Header (Eurorack or MTA-156)1xx
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Eurorack panel1xxhttp://www.resynthesis.co.uk
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