ARP 1601 clone Build Thread
Moderators: Kent, luketeaford, Joe., lisa
ARP 1601 clone Build Thread
This is the Build Thread for the ARP 1601 Sequencer clone. Everything here relates to the PCB versions up to and including Rev 4.
There are some minor changes to the PCB for Rev 4; three DIP ICs which are becoming hard to obtain are substituted with readily available SMD versions.
The two extra power supply components are: 1-off 652-RLB9012-120KL and 1-off 667-EEU-EB1H470SH, otherwise the BOM is identical. Added to Round 2 BOM and attached below. Note I did specify 667-EEU-EB1E470SH but that's now out of stock at Mouser until late October so I have substituted it.
Mouser BOM direct link: http://www.mouser.com/ProjectManager/Pr ... d547f3c361 Optional components are marked as such in Customer Part No. field along with notes added to each. This covers all PCB revisions up to Rev 4.
Round 2 full Parts List (includes Mouser items) added below. Note that the Mouser BOM does not contain all parts required to build the sequencer - you need the few extra parts listed in the Parts List. Notably this includes two CA3086 ICs, the key caps and 25 PJ301BM jacks (same as TTSH) from Thonk or Erthenvar.
The general thread is at https://www.muffwiggler.com/forum/viewt ... p?t=110640.
Further information may be found on LED-Man's website https://www.dsl-man.de/display/TTSHADDONS/Arp1601
The PCB is marked with component numbers rather than values as it helps fault-finding if it ever becomes necessary. However almost all of these are obscured by the component when fitted so keep a copy of the PCB layout PDF file.
Documentation:
The Build Guide shows a step by step guide to building with photos. This was based on a Rev 1 PCB so there are minor differences between the PCB revisions.
The Parts List contains a list of all items required to build the kit. Note that some items are marked as optional - you may omit all optional items only if you plan to use a +/-15V linear power supply of your own.
The Mouser BOM contains all the items you can buy from Mouser, but you can of course buy from wherever you prefer. All items in the Mouser BOM are also listed in the Parts List.
The PCB layout PDF. You should find it useful when building as every component is tagged with the part number and/or value.
The schematic diagram may come in useful but is not necessary.
The Service Manual will be needed for calibration and fault finding if necessary.
The User Guide will give you some tips on using the sequencer.
The Patch Chart can be printed so you can record your favourite settings.
Tips:
1. When initially testing the sequencer, ensure that either the Foot Switch socket is connected and wired as per Build Guide, or that the header pins for it on the PCB are shorted, or the start/stop function will not work and it will run continuously in Gate Mode.
2. The 12mm stand-offs can safely be filed or turned down to 11mm, or an extra washer placed on each jack beneath the panel to even up the height a little.
3. The start/stop pushbutton and step pushbutton were both a little prone to contact bounce giving multiple triggers on earlier PCB verions (up to Rev 2). As a result increasing C5 from 10nF to 33nF, and adding a 1nF capacitor soldered directly across the SW1 and SW3 terminals solves the issue. These extra capacitors are incorporated on Rev3 and later PCBs.
4. One word of caution for anyone planning to leave out or change the colour of the LEDs in the 60mm pitch sliders - the LED is part of a chain which supplies a small current to the gate circuits so omitting the LED altogether will cause the gate function to not work, and altering (especially reducing) the current by using a different colour LED may cause it to work unreliably.
Red LEDs will not cause a problem but others might. If in doubt PM me and I will suggest some resistor value changes to suit.
Further tips will be added as I think of them or they are pointed out by users.
There are some minor changes to the PCB for Rev 4; three DIP ICs which are becoming hard to obtain are substituted with readily available SMD versions.
The two extra power supply components are: 1-off 652-RLB9012-120KL and 1-off 667-EEU-EB1H470SH, otherwise the BOM is identical. Added to Round 2 BOM and attached below. Note I did specify 667-EEU-EB1E470SH but that's now out of stock at Mouser until late October so I have substituted it.
Mouser BOM direct link: http://www.mouser.com/ProjectManager/Pr ... d547f3c361 Optional components are marked as such in Customer Part No. field along with notes added to each. This covers all PCB revisions up to Rev 4.
Round 2 full Parts List (includes Mouser items) added below. Note that the Mouser BOM does not contain all parts required to build the sequencer - you need the few extra parts listed in the Parts List. Notably this includes two CA3086 ICs, the key caps and 25 PJ301BM jacks (same as TTSH) from Thonk or Erthenvar.
The general thread is at https://www.muffwiggler.com/forum/viewt ... p?t=110640.
Further information may be found on LED-Man's website https://www.dsl-man.de/display/TTSHADDONS/Arp1601
The PCB is marked with component numbers rather than values as it helps fault-finding if it ever becomes necessary. However almost all of these are obscured by the component when fitted so keep a copy of the PCB layout PDF file.
Documentation:
The Build Guide shows a step by step guide to building with photos. This was based on a Rev 1 PCB so there are minor differences between the PCB revisions.
The Parts List contains a list of all items required to build the kit. Note that some items are marked as optional - you may omit all optional items only if you plan to use a +/-15V linear power supply of your own.
The Mouser BOM contains all the items you can buy from Mouser, but you can of course buy from wherever you prefer. All items in the Mouser BOM are also listed in the Parts List.
The PCB layout PDF. You should find it useful when building as every component is tagged with the part number and/or value.
The schematic diagram may come in useful but is not necessary.
The Service Manual will be needed for calibration and fault finding if necessary.
The User Guide will give you some tips on using the sequencer.
The Patch Chart can be printed so you can record your favourite settings.
Tips:
1. When initially testing the sequencer, ensure that either the Foot Switch socket is connected and wired as per Build Guide, or that the header pins for it on the PCB are shorted, or the start/stop function will not work and it will run continuously in Gate Mode.
2. The 12mm stand-offs can safely be filed or turned down to 11mm, or an extra washer placed on each jack beneath the panel to even up the height a little.
3. The start/stop pushbutton and step pushbutton were both a little prone to contact bounce giving multiple triggers on earlier PCB verions (up to Rev 2). As a result increasing C5 from 10nF to 33nF, and adding a 1nF capacitor soldered directly across the SW1 and SW3 terminals solves the issue. These extra capacitors are incorporated on Rev3 and later PCBs.
4. One word of caution for anyone planning to leave out or change the colour of the LEDs in the 60mm pitch sliders - the LED is part of a chain which supplies a small current to the gate circuits so omitting the LED altogether will cause the gate function to not work, and altering (especially reducing) the current by using a different colour LED may cause it to work unreliably.
Red LEDs will not cause a problem but others might. If in doubt PM me and I will suggest some resistor value changes to suit.
Further tips will be added as I think of them or they are pointed out by users.
- Attachments
-
- Rev 3-4 Mouser BOM.xls
- Mouser BOM for Rev 3 and Rev 4 PCBs. Included are the three SMD ICs for Rev 4 PCBs and for earlier boards if using and SMD - DIP adapter board.
- (29.5 KiB) Downloaded 149 times
-
- ARP 1601 Parts List (Rev 3 & 4 PCBs).xls
- Updated parts list for Rev 3 and Rev 4 PCBs
- (63 KiB) Downloaded 287 times
-
- ARP 1601 Sequencer Rev 4 - PCB (components and top silkscreen only).pdf
- PDF of topside of Rev 4 PCB showing components and top silkscreen only
- (766.9 KiB) Downloaded 175 times
-
- ARP 1601 Sequencer Rev 4 - PCB (full).pdf
- PDF of topside of Rev 4 PCB with all tracks etc.
- (935.9 KiB) Downloaded 205 times
-
- ARP 1601 Sequencer Rev 3 - Schematic.pdf
- 1601 Rev 3 schematic
- (533.27 KiB) Downloaded 203 times
-
- ARP 1601 Sequencer Rev 3 - PCB with tracks.pdf
- 1601 Rev 3 PCB layout with copper
- (843.93 KiB) Downloaded 163 times
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- ARP 1601 Sequencer Build Doc (Rev 2).pdf
- Updated Build Guide (covers Rev 1 and Rev 2 PCBs) with a little extra information and includes the start/stop push-button mod to eliminate contact bounce problems.
- (2.47 MiB) Downloaded 536 times
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- Arp1601 Sequencer Service Manual HQ.pdf
- (20.79 MiB) Downloaded 288 times
-
- ARP 1601 Patch chart.pdf
- (850.93 KiB) Downloaded 192 times
-
- ARP Sequencer Owners Manual.pdf
- (20.91 MiB) Downloaded 264 times
Last edited by Kipling on Wed Dec 28, 2016 12:38 pm, edited 19 times in total.
- LED-man
- Super Deluxe Wiggler
- Posts: 1524
- Joined: Wed Aug 08, 2012 1:48 pm
- Location: Wolfsburg Germany
- Contact:
i have changed the ARP Partlist on my page:
https://www.dsl-man.de/display/TTSHADDONS/Arp1601
the resistor and capacitor values are sorted, to make parts handling easier.
direct download:
https://www.dsl-man.de/download/attachm ... xls?api=v2
https://www.dsl-man.de/display/TTSHADDONS/Arp1601
the resistor and capacitor values are sorted, to make parts handling easier.
direct download:
https://www.dsl-man.de/download/attachm ... xls?api=v2
- ultravox
- Ultra Wiggler
- Posts: 753
- Joined: Mon Oct 21, 2013 5:45 pm
- Location: USA, Singapore, China, Hong Kong, Japan
Seems I always forget a thing or two when starting a new build: ARP 1601 kit & boat - check, hard to find sliders & semiconductors - check, erthenvar jacks and AC power entry module and fuses - oops! 
Anyways, I'll get everything else soldered in this weekend while waiting for those tidbits to arrive.

Anyways, I'll get everything else soldered in this weekend while waiting for those tidbits to arrive.

A Har ! Seems you are not alone. One or two more items for me to collect too.ultravox wrote:Seems I always forget a thing or two when starting a new build: ARP 1601 kit & boat - check, hard to find sliders & semiconductors - check, erthenvar jacks and AC power entry module and fuses - oops!
Anyways, I'll get everything else soldered in this weekend while waiting for those tidbits to arrive.

- ultravox
- Ultra Wiggler
- Posts: 753
- Joined: Mon Oct 21, 2013 5:45 pm
- Location: USA, Singapore, China, Hong Kong, Japan
It's a holiday weekend here in the states so I'm looking at an even further delay before the parts arrive and be able to fire it up and start calibrations. I'll cut out the wooden end cheeks and get them stained to keep busy till then.nickster wrote:A Har ! Seems you are not alone. One or two more items for me to collect too.ultravox wrote:Seems I always forget a thing or two when starting a new build: ARP 1601 kit & boat - check, hard to find sliders & semiconductors - check, erthenvar jacks and AC power entry module and fuses - oops!
Anyways, I'll get everything else soldered in this weekend while waiting for those tidbits to arrive.thanks for the reminder.

- LED-man
- Super Deluxe Wiggler
- Posts: 1524
- Joined: Wed Aug 08, 2012 1:48 pm
- Location: Wolfsburg Germany
- Contact:
My first sequencer works fine without any trouble.
it was a bit difficult to add the resistors without value silkscreen.
calibration task was easy by usage of my keithley DMM and a DSO.
It works perfect on a oberheim SEM.
A ttsh isnt avaiable due to VCO sync modification.

it was a bit difficult to add the resistors without value silkscreen.
calibration task was easy by usage of my keithley DMM and a DSO.
It works perfect on a oberheim SEM.
A ttsh isnt avaiable due to VCO sync modification.

Last edited by LED-man on Mon May 25, 2015 1:15 pm, edited 2 times in total.
One small thing I have noticed with my build, the 6 spacers were a little too tall at 12mm, I ended up filing mine down to 11mm, which just about matches the height of the jacks and switches.
It's only a small cosmetic difference (there is less flexing of the panel near the sliders and switches) but I thought it worth the effort. But then I am a bit pedantic about my builds.
I'm not sure that 11mm spacers are even available, but you could always use 10mm spacers with some extra washers for those without metalworking tools.
All told though, an enjoyable build so far. I should have some time for testing my build tomorrow, so I'll post some pics soon as well.
Regards
Magman
It's only a small cosmetic difference (there is less flexing of the panel near the sliders and switches) but I thought it worth the effort. But then I am a bit pedantic about my builds.

I'm not sure that 11mm spacers are even available, but you could always use 10mm spacers with some extra washers for those without metalworking tools.
All told though, an enjoyable build so far. I should have some time for testing my build tomorrow, so I'll post some pics soon as well.
Regards
Magman
- satindas
- Veteran Wiggler
- Posts: 670
- Joined: Sat Jan 08, 2011 6:45 pm
- Location: Wiltshire, United Kingdom
50 x 11mm hex spacers on Amazon. I grabbed a bunch of these ages ago, probably got 30 or so left...somewhere 

These are bizarre manifestations of untamed high-frequency parasitic oscillations...
www.psycox.co.uk
www.psycox.co.uk
- Altitude909
- Super Deluxe Wiggler
- Posts: 3574
- Joined: Wed Aug 24, 2011 5:13 pm
- Location: Meesheegan
- Altitude909
- Super Deluxe Wiggler
- Posts: 3574
- Joined: Wed Aug 24, 2011 5:13 pm
- Location: Meesheegan
- Altitude909
- Super Deluxe Wiggler
- Posts: 3574
- Joined: Wed Aug 24, 2011 5:13 pm
- Location: Meesheegan
- Altitude909
- Super Deluxe Wiggler
- Posts: 3574
- Joined: Wed Aug 24, 2011 5:13 pm
- Location: Meesheegan
Same as the TTSH - just pass a piece of bare tinned wire through the bead and solder in both ends for L1 and L2. Note the ones in the photo are not the part that's listed in the BOM - I had a load lying around from years back.Altitude909 wrote:So what's the story with the ferrite beads? They dont fit and have no leads
EDIT: It seems I specified a part that's 14mm long - many apologies. I know ferrite is impossible to cut with normal tools ( a diamond disc would probably do it) so I'll try to identify a suitable alternative.

- Altitude909
- Super Deluxe Wiggler
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I may be able to help you out. I have a bunch on order. Provided I get the correct items I should have some spare. Once these have arrived I'll get back in touch.MrRoper wrote:Any UK or EU based wigglers have 3 spare keycaps or have placed an order and don't mind selling me 3? The bloody PMKB website isn't letting me enter the shop for some reason
Thanks, I'll update the BOM ASAP.Altitude909 wrote:Try Mouser# 875-28L0138-80R-10Kipling wrote: EDIT: It seems I specified a part that's 14mm long - many apologies. I know ferrite is impossible to cut with normal tools ( a diamond disc would probably do it) so I'll try to identify a suitable alternative.
- sduck
- experimental use of gravity
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I've always used mouser # 623-2743002112LF, but Altitudes909's part looks good also.Kipling wrote:Thanks, I'll update the BOM ASAP.Altitude909 wrote:Try Mouser# 875-28L0138-80R-10Kipling wrote: EDIT: It seems I specified a part that's 14mm long - many apologies. I know ferrite is impossible to cut with normal tools ( a diamond disc would probably do it) so I'll try to identify a suitable alternative.
Altitudes909 wrote:Try Mouser# 875-28L0138-80R-10
I'll go with the 875-28L0138-80R-10 as the shorter case length will make it easier to bend the legs to fit a 0.4"/10.16mm pad spacing. Thanks for your help on this.sduck wrote:I've always used mouser # 623-2743002112LF, but Altitudes909's part looks good also.
EDIT Round 2 BOM and Parts List updated and added to Post #1 above along with direct link to Mouser Project. If you are able to edit the Project (hopefully not) please do not do so, but simply click Order Project and edit your cart instead.