Benutzer:Felicia/Modular-Synth/VCO: Unterschied zwischen den Versionen

Aktuelle Version vom 6. August 2021, 12:11 Uhr

This is the VCO module, as per YuSynth VCO Website.

Construction

I've etched a PCB with the original PCB provided by Yves
The board was populated, soldering pad size was very good, so this was done in about two hours
The panel was made of 2mm wood, hand-marked and drilled holes for the panel elements. The front panel design was made by myself and printed onto Zweckform 3487 white plastic sheets using a CLP-315 color laser printer. It was glued with "spray glue" onto the wooden panel.

It is noteworthy that the etching and soldering the PCB took only about 3 hours, while creating the front panel and wiring the connections took about at least 6 hours. Overall build time was 9-10 hours, planning time was the same amount.

I also thought that I probably want an aluminium front panel, but due to the very good results with the plastic sheets, I probably will stick to them for cost reasons. The 2mm wood panel also seems to be quite solid.

Construction Troubles

There are several issues:

Much wiring is done at the panel itself. This makes it hard to swap the front panel with a more robust one. When I'm building other YuSynth modules, I'll re-design the PCB first to have one connector for each front panel element, even if it might bring a bit of noise into the system.
- Because I didn't like wiring behind the front panel, I added a separate PCB where I bring connected front panel elements together.
- Another thing to add to the PCB would be having the octave switch and sync connectors optional, so one can decide to skip or implement both switches by connecting a jumper and a set of connectors.
Because I'll re-layout the modules anyways, I have an idea of adding a PSU adaptor to each board, so I can build one board and use several different power connectors.
The schematic contains resistor names, but they are missing from the boards. So it is very hard to debug because only values, not names, are printed on the PCB.

Issues

All major issues solved. Works like a charm!
If the frequency pot is turned to 5 (center), the frequency is already very high. Need to investigate if this is wanted or a "bug".
Switching from hard sync to soft sync causes a minor frequency. Not sure why, needs investigation. Maybe fixes itself once a CV voltage is applied

Previous Issues

The sine looked very odd. This wasn't actually a bug - T3 wasn't adjusted. I accidently had the scope set to AC coupling, so I actually didn't touch T3.

Experiments

Once the heat gun has arrived, test how well the tempco works.

Parts List

Quantity	Part	Distributor	Distributor Order Number	Price per Item	Sum
1	79L15	Reichelt	µA 79L15	0.16	0.16
1	78L15	Reichelt	µA 78L15	0.14	0.14
6	TT Potentiometer 16 mm, 25kΩ lin, solder pads	Tube Town	tpo16-25k-lin	0.69	4.14
2	TL074	Reichelt	TL 074 DIL	0.3	0.6
1	TL072	Reichelt	TL 072 DIP	0.28	0.28
1	Styroflex Capacitor, 220pF, 2,5%	Reichelt	STYROFLEX 220P	0.31	0.31
2	22µF 63V	Reichelt	RAD 105 22/63	0.04	0.08
2	5 pin PCB Connector (pin+socket), straight, white, 25cm cable	Reichelt	PS 25/5G WS	0.45	0.9
2	3 pin PCB Connector (pin+socket), straight, white, 25cm cable	Reichelt	PS 25/3G WS	0.29	0.58
5	2 pin PCB Connector (pin+socket), straight, white, 25cm cable	Reichelt	PS 25/2G WS	0.29	1.45
5	100nF MKS-2 5% 63V	Reichelt	MKS-2-5 100N	0.09	0.45
2	49,9kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 50,0K	0.04	0.08
1	5,6kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 5,60K	0.04	0.04
2	470kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 470K	0.04	0.08
1	47kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 47,0K	0.04	0.04
1	4,7kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 4,70K	0.04	0.04
2	33kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 33,0K	0.04	0.08
1	3,3MΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 3,30M	0.04	0.04
1	270kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 270K	0.04	0.04
2	220kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 220k	0.04	0.08
2	22kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 22,0k	0.04	0.08
1	200kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 200K	0.04	0.04
1	180kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 180K	0.04	0.04
2	150kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 150K	0.04	0.08
1	15kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 15,0K	0.04	0.04
2	12kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 12,0K	0.04	0.08
14	100kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 100K	0.04	0.56
6	10kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 10,0K	0.04	0.24
1	10Ω 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 10,0	0.04	0.04
1	1,5kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 1,50K	0.04	0.04
4	1kΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 1,00K	0.04	0.16
1	LM311N	Reichelt	LM 311 DIP	0.22	0.22
3	Ceramic Disc Capacitor, 500V, 47pf	Reichelt	KERKO-500 47P	0.07	0.21
1	Ceramic Disc Capacitor, 500V, 10pf	Reichelt	KERKO-500 10P	0.07	0.07
1	Ceramic Disc Capacitor, 500V, 100pf	Reichelt	KERKO-500 100P	0.04	0.04
1	J112	Musikding	J112	0.25	0.25
1	IC-Socket, 8 pin, low profile, twisted, gilded	Reichelt	GS 8P	0.19	0.19
2	IC-Socket, 14 pin, low profile, twisted, gilded	Reichelt	GS 14P	0.26	0.52
10	Jack plug, 6.3 mm mono, central fixing, with switch, solder pads	Reichelt	EBMS 63	0.22	2.2
1	Photo-coated board, Bungard 75x100mm, single-sided 35µm, 1,5mm width	Reichelt	BEL 75X100-1	0.96	0.96
2	BC547B Transistor NPN TO-92 45V 0,1A 0,5W	Reichelt	BC 547B	0.04	0.08
1	Precision Potentiometer, 25 Turns, vertical, 50kΩ, Type 64W	Reichelt	64W-50K	0.3	0.3
1	Precision Potentiometer, 25 Turns, vertical, 20kΩ, Type 64W	Reichelt	64W-20K	0.3	0.3
1	Precision Potentiometer, 25 Turns, vertical, 200kΩ, Type 64W	Reichelt	64W-200K	0.3	0.3
1	Precision Potentiometer, 25 Turns, vertical, 10kΩ, Type 64W	Reichelt	64W-10K	0.3	0.3
6	1N4148 Planar Epitaxial Switching Diode, DO35, 100V, 0,15A	Reichelt	1N 4148	0.02	0.12
1	LT300014T261K0J	HBE	1174306	0.32	0.32
3	1MΩ 1% tolerance, ¼Watts, Metal Film	Reichelt	METALL 1,00M	0.04	0.12
6	Potentiometer Knob REAN P670 series	-	-	0.20	1.20
1	Wooden Panel, 2mm thick	-	-	1	1
1	One sheet of Zweckform 3487	-	-	about 0,50	0,50
SUM					20.16

Not included in the list are common things like cables, screws, nuts etc.

All prices in EUR.

@@ Zeile 1: / Zeile 1: @@
 This is the VCO module, as per [http://yusynth.net/Modular/EN/VCO/index.html YuSynth VCO Website].
+[[Image:Felicitus YuSynth VCO Complete.jpg|300px|thumb|right|Completed Module]]
+[[Image:Modular Synth VCO Front Panel.svg|300px|thumb|right|YuSynth VCO Front Panel as Drawing]]
+== Construction ==
+* I've etched a PCB with the original PCB provided by Yves
+* The board was populated, soldering pad size was very good, so this was done in about two hours
+* The panel was made of 2mm wood, hand-marked and drilled holes for the panel elements. The front panel design was made by myself and printed onto Zweckform 3487 white plastic sheets using a CLP-315 color laser printer. It was glued with "spray glue" onto the wooden panel.
+It is noteworthy that the etching and soldering the PCB took only about 3 hours, while creating the front panel and wiring the connections took about at least 6 hours. Overall build time was 9-10 hours, planning time was the same amount.
+I also thought that I probably want an aluminium front panel, but due to the very good results with the plastic sheets, I probably will stick to them for cost reasons. The 2mm wood panel also seems to be quite solid.
+=== Construction Troubles ===
+There are several issues:
+* Much wiring is done at the panel itself. This makes it hard to swap the front panel with a more robust one. When I'm building other YuSynth modules, I'll re-design the PCB first to have one connector for each front panel element, even if it might bring a bit of noise into the system.
+** Because I didn't like wiring behind the front panel, I added a separate PCB where I bring connected front panel elements together.
+** Another thing to add to the PCB would be having the octave switch and sync connectors optional, so one can decide to skip or implement both switches by connecting a jumper and a set of connectors.
+* Because I'll re-layout the modules anyways, I have an idea of adding a PSU adaptor to each board, so I can build one board and use several different power connectors.
+* The schematic contains resistor names, but they are missing from the boards. So it is very hard to debug because only values, not names, are printed on the PCB.
+== Issues ==
+* All major issues solved. Works like a charm!
+* If the frequency pot is turned to 5 (center), the frequency is already very high. Need to investigate if this is wanted or a "bug".
+* Switching from hard sync to soft sync causes a minor frequency. Not sure why, needs investigation. Maybe fixes itself once a CV voltage is applied
+== Previous Issues ==
+* The sine looked very odd. This wasn't actually a bug - T3 wasn't adjusted. I accidently had the scope set to AC coupling, so I actually didn't touch T3.
+== Experiments ==
+* Once the heat gun has arrived, test how well the tempco works.
 == Parts List ==
@@ Zeile 289: / Zeile 326: @@
 | Reichelt
 | KERKO-500 100P
-| 4
+| 0.04
-| 4
+| 0.04
 |-
 | 1
@@ Zeile 391: / Zeile 428: @@
 | 1MΩ 1% tolerance, ¼Watts, Metal Film
 |
+| Reichelt
+| METALL 1,00M
+| 0.04
+| 0.12
+|-
+| 6
+| Potentiometer Knob REAN P670 series
 |
+| -
+| -
+| 0.20
+| 1.20
+|-
+| 1
+| Wooden Panel, 2mm thick
 |
+| -
+| -
+| 1
+| 1
+|-
+| 1
+| One sheet of Zweckform 3487
 |
-| 0
+| -
+| -
+| about 0,50
+| 0,50
 |-
 | SUM
@@ Zeile 402: / Zeile 463: @@
 |
 |
-| 21.34
+| 20.16
 |}
+Not included in the list are common things like cables, screws, nuts etc.
 All prices in EUR.