Summary of Contents for HERZLICH OMEN
- Page 2 Introduction ............................. 3 Safety ............................. 3 Equipment............................4 Design notes ........................... 5 BOM ............................... 6 Build guide ............................6 Step 1: diodes and resistors ......................6 Step 2: pinheaders ........................7 Step 3: OPTOCOUPLER assembly ..................... 7 Step 4: optocoupler soldering ...................... 8 Step 5: jacks ..........................
- Page 3 Thank you for choosing an - this build guide will help you in your endeavor to successfully build your new dual passive, resonant LPG - I recommend you read the build guide before starting your build, and I suggest leaving everything in the bags they came in until you are instructed to retrieve something from them.
- Page 4 You will need some basic hand tools and, ideally, some proficiency with them to successfully complete this project. If you need to buy tools, or if your tools are not up to the task, I recommend buying the best quality tools you can afford - it will serve you best in the long run, and you will not have to continuously upgrade every time a cheap tool breaks or proves insufficient.
- Page 5 The Omen is an unusual take on the familiar trope of the passive LPG, as it brings resonance and a -6dB filter slope to the typical -3dB non-resonant LPG design. You may also meet people in your musical journey who call your new passive, resonant filter "witchcraft" or "impossible,"...
- Page 6 Identifier Component Designator Quantity 47nJ 47nF film capacitor 224J 220nF film capacitor 334J 330nF film capacitor 684J 680nF film capacitor 223J 22nF film capacitor C5, C6 1N4148 diode D1, D2 3,5mm jack 120mH SMD inductor L1,L2,L3 3mm LED LED1, LED2 470 ohm resistor Subminiature Toggle Switch U1, U2...
- Page 7 Locate the two 2x3 pinheaders in the red heart bag, and insert them on the other side of the PCB - the silkscreen print indicates the correct side for the pinheaders. Turning the PCB around carefully, solder one pin of each pinheader as you hold the pins flat against a hard surface, then check that both pinheaders are installed flush with the board.
- Page 8 The vactrols are a polarized components, and must be aligned correctly with the board - but as we have now obscured the components inside within a plastic shell, we need to rely on the legs to identify the correct alignment. LEDs follow a convention where the cathode (the negative side) always has a shorter leg than the anode.
- Page 9 Locate the yellow smiley bag, which contains six 3,5mm jacks. Insert the jacks with respect to the print as before, and carefully turn the board over. Once again, solder one pin on each jack, then turn the board around and check that all the jacks are flush with the board. Reheat the joints and press the jacks against a hard surface while you do, if necessary, and continue until everything is flush, then solder the rest of the legs.
- Page 10 Locate the potentiometers in the green alien bag. You may need to squeeze the side legs slightly to make them fit, and if the front legs have become misaligned, you can carefully realign them. Inserting them into the board may require a firm push, but be careful not to use excessive force.
- Page 11 Finally, locate the 3mm LEDs in the green alien bag. Insert both in the board, but do not solder anything yet, paying careful attention to align the cathode (short leg) with the square pad and the anode with the round pad. Place the front panel over the components you have soldered so far, and secure it in place by adding nuts to a few of your jacks.
- Page 12 You are well past halfway done now! Using the nuts that came with the jacks, potentiometers and toggle switches, carefully screw everything down firmly, securing the panel and your components in place. Finally, press the knobs down over the potentiometers. Locate the SMD inductors in the red heart bag.
- Page 13 Locate the film capacitors in the red bag, and refer to the BOM to identify the correct location for each capacitor. Once again, be sure to solder one leg of each in place before checking if they are flush with the board, and reflowing your joints if they are not. Don't forget to trim the leads when you have soldered all the capacitors.
- Page 14 - you may have missed something, or a joint may not be adequately soldered. Congratulations, you have built an - now, go explore the endless sonic potential of the Omen, and don't forget to have fun, experiment and break the rules from time to time.
- Page 15 Sometimes things go wrong - that's OK! If you have run into trouble while building your module, and you can't seem to get yourself out of trouble, you can reach out to lb@herzlich.technology for assistance. Please send well lit, high resolution photos of your PCBs to help me investigate and identify the problem with you.
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