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Next, Install the 2k trimmer.

Next, Install the 2x 10uf electrolytic caps in the spaces marked C3 and C5. It’s very important that these

capacitors are installed correctly. The long leg goes into the square hole which has an asso sym-

bol next to it, the shorter leg goes into the round hole, so the gray stripe on the body of the cap is orien-

tated away from the edge with the blue trimmer.

Please check the photo to confirm correct orientation.

CV Express

build guide

version 1.0

December 2015

15

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Summary of Contents for CV Express

Page 1: ...ied by the builder we ve included a list of all the relevant resistor colour codes needed for this project It s certainly worth double checking that the correct resistors are all going in the right sp...

Page 2: ...nfirm the values either visually using the provided colour codes or by measuring with a multimeter CV Express build guide version 1 0 1 Locate and install the single 390r resistor in the place marked...

Page 3: ...nstall the single 36k resistor in the place marked R4 36k resistors are marked Orange Blue Black Red Brown 3 Next Install the single 4 7m resistor in the place marked R9 4m7 resistors are marked Yello...

Page 4: ...r in the place marked R10 100r resistors are marked Brown Black Black Black Brown 5 Next Install the single 220k resistor in the place marked R21 220k resistors are marked Red Red Black Orange Brown D...

Page 5: ...ll the single 220r resistor in the place marked R31 220r resistors are marked Red Red Black Black Brown 7 Next Install the pair of 4 7k resistors in the places marked R6 R11 4k7 resistors are marked Y...

Page 6: ...Component PCB as R13 R23 R30 10k resistors are marked Brown Black Black Red Brown 9 Next Install four 2k resistors in the places marked on the Front Panel Component PCB as R7 R17 R25 R34 2k resistors...

Page 7: ...r 200k resistors in the places marked R18 R22 R28 R39 200k resistors are marked Red Black Black Orange Brown 11 Next Install the pair of 110k resistors in the places marked R15 R40 110k resistors are...

Page 8: ...R26 R33 R35 R36 R37 R41 100k resistors are marked Brown Black Black Orange Brown 13 Now move onto soldering the diodes There are a few different types included in the CV Express kit and it s very imp...

Page 9: ...8 diodes in the places on the pcb marked D1 D2 2x loose in cap bag small red body black band on one end Please refer to the picture it s very important that the black band is orientated correctly with...

Page 10: ...ry important that the silver band is orientated correctly with the white stripe silkscreen marking on the pcb Next we proceed with installing the caps All of the ceramics caps are bipolar so orientati...

Page 11: ...e aware three of them are installed under or on the opposite side of the TL074 s As long as you ensure the correct value is installed the side of the board the caps are installed on doesn t really mat...

Page 12: ...gle 10nF ceramic capacitor into the place on the pcb marked C2 1x loose in cap bag small orange body marked cardboard tape 18 Next Install the three 3 3pF ceramic capacitors in the places marked C8 C9...

Page 13: ...c sockets ensuring the notch in the socket is aligned with the silkscreen image on the pcb all of the sockets point upwards 20 Next Install the two PTC fuses these go in the two places marked 0 1a jus...

Page 14: ...Next Install the LM317LZ in the space marked U4 make sure to orientate it so it matches the silkscreen image 22 Next Install the 2x5 way power header CV Express build guide version 1 0 December 2015...

Page 15: ...are installed correctly The long leg goes into the square hole which has an associated sym bol next to it the shorter leg goes into the round hole so the gray stripe on the body of the cap is orien ta...

Page 16: ...o continue with the build if building from the kit CV Express build guide version 1 0 Look to get all the headers aligned neatly and flush with the pcb Some people prefer to put the pcb sandwich toget...

Page 17: ...he jacks are all installed cleanly flip it over and then solder 27 Next Install the TL074 into the 14 pin ic socket on the front panel component pcb It s not imperative to install it now and some may...

Page 18: ...d is installed into the placed marked D3 For the BiLED s the inner circle indicates the cathode of the primary led so the short lead goes through the inner circled hole on the silkscreen this presumes...

Page 19: ...ks and the switch This helps align the parts to the panel Flip the panel and ensure that all four led s are protruding correctly through their panel holes then you can finally start to solder the pots...

Page 20: ...ponent pcb of any components installed prior to this step It s worth considering attaching the other pcb and aligning all the headers before tack soldering a single pin on all headers and then proceed...

Page 21: ...en the pcb s You should expect to see a few millimeters of the pins showing between the male and female pin headers In the kits we ve provided a pair of 12mm pcb spacers plus additional washers Please...

Page 22: ...vari output level and red is for the comparator threshold 32 Finally Install the power cable taking extra care to ensure the red stripe is oriented to match the silkscreen legend red stripe to V The m...

Page 23: ...CV Express build guide version 1 0 December 2015 23...

Page 24: ...istor 14 R15 40 110K Resistor 2 R3 8 20 27 38 1K Resistor 5 R29 390R Resistor 1 R4 36K Resistor 1 R6 11 4K7 Resistor 2 R7 17 25 34 2k Resistor 4 R9 4M7 Resistor 1 R10 100R Resistor 1 R13 23 30 10K Res...

Page 25: ...mm Screws Washers 4 14 Pin IC Socket 3 3 Pin Male Header 1 3 Pin Female Header 1 4 Pin Male Header 3 4 Pin Female Header 3 8 Pin Male Header 1 8 Pin Female Header 1 Davies Knobs Black 3 Davies Knobs G...

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