BYOC Digital Echo & Ping Pong Kit, Instructions Manual

Page 1: ...hematic Understanding the circuit and Troubleshooting page 20 31 Please read through the instructions completely before beginning this project This is one of our most difficult kits and it is a little...

Page 2: ...ed brown 2 15k brown green black red brown 2 511k green brown brown orange brown 1 2 2M red red black yellow brown Capacitors 1 47pf ceramic disc 1 470pf ceramic disc 471 4 0022uf film 222 or 2n2j 7 0...

Page 3: ...continuing You might have to cut a slit in the cover with a blade and use a small screwdriver to get leverage 2 B100k linear 2 B50k linear Hardware 1 drilled enclosure w 4 screws 1 byoc pingpong kit c...

Page 4: ...r follow the instructions in order Step 1 Add the three 1uf aluminum electrolytic capacitors to the underside of the PCB Aluminum electrolytic caps are polarized which means they have a positive side...

Page 5: ...mper You can use some of the component clippings left over from the last step Step 3 Add the resistors Resistors are not polarized and can be inserted into the PCB in either direction The two 1k resis...

Page 6: ...Step 4 Add the diode The end with the stripe cathode goes in the square solder pad The end with no stripe anode goes in the round solder pad...

Page 7: ...e PCB or didn t clip off enough of the excess lead If your DIP16 socket does not seat perfectly clean up your soldering on the 1uf caps If it still does not seat perfectly it s OK Just as long as as t...

Page 8: ...larized The positive side will have avery small symbol printed on the capacitor and should go in the square solder pad Step 8 Add the remaining seven 1uf aluminum electrolytic caps Remember that they...

Page 9: ...ps small green caps highlighed in yellow and the one 47pf ceramic disc cap small round orange cap Step 10 Add remaining fourteen film caps yellow box caps highlighted in yellow and the one 470pf ceram...

Page 10: ...Step 11 Add the larger aluminum electrolytic capacitors Remember that these are polarized and the positive end with the longer lead goes in the square solder pad...

Page 11: ...Step 12 You should have two resistors left a 1k and a 10k These need to be mounted vertically They are not polarized so it does not matter which end goes where...

Page 12: ...to tighten Orient the jacks so that if you are looking at the solder lug end of the jack the bevelled sleeve end would be pointing at 2 o clock and the sleeve of the out jack would be pointing at 7 o...

Page 13: ...all the 3PDT toggle switch It does not matter which side you designate as the leading edge of the switch as long as you orient it so that the flat sides of the solder lugs are aligned in horizontal ro...

Page 14: ...snap Because it s a little difficult to get to the solder lugs of the enclosed style jacks once the circuit board is mounted it s a good idea to wire this portion of the build and leave the ground an...

Page 15: ...he actual soldering on the topsid of the PCB Read through all the steps in this portion before doing anything so that you can get the big picture Step 2 Install the LED but do not solder it or clip th...

Page 16: ...e enclosure so that you can easily move them to line up with the eyelets on the PCB You may need to bend the leads of the pots into place if they were bent in shipping Step 4 once you have the PCB in...

Page 17: ...Step 6 Solder the LED toggle switch and pots on the top side of the PCB Clip the excess LED leads Do not clip the leads of the pots...

Page 18: ...Wiring the PCB...

Page 19: ...oth for orienting If the chip has both always refer to the u shaped notch first Install the base of the enclosure with the 4 screws that came with your kit Add the rubber bumper feet unless you re a v...

Page 20: ...or the lowest voltage without going under 9V This will probably be 20V on most meters With the pedal footswitch in the engaged position you should get approximately 9VDC when you touch the red probe t...

Page 21: ...let s check your offboard wiring first and make sure that you are getting signal to and from the PCB to rule that problem out Set your DMM to test for continuity Make sure your footswitch is in the EN...

Page 22: ......

Page 23: ...ocation you want to touch the probe to the exposed component or wire lead at that location and not to the PCB solder pad if possible If you are testing these various locations by touching the probe to...

Page 24: ...RED location 1 but drop to 8 5V at location 2 and then drop again to 8 2V at location 3 This is to be expected But RED locations 3 8 should all remain constant and should be somewhere between 9V and...

Page 25: ...reading should be approx half of what your Full Positive Voltage is after RED3 4 5V to 4V is to be expected Set your DMM to read 5VDC Touch the black probe to the sleeve of either jack Touch the red...

Page 26: ...e Regulated 5V power supply This is the power supply provide by the 78L05 5 volt regulator Touch the black probe to ground Touch the red probe to the various GREEN locations They should all be approxi...

Page 27: ...thout changing the original tone at all but the buffers may add or cut a very small amount of high frequency Wet signal is where the dry signal gets split after the input buffer and is sent to actual...

Page 28: ...gnal from the output of the first delay chip to the input of the second when the pedal is in normal echo mode not pingpong mode If the first delay chip is receiving dry signal to PIN16 but is not prod...

Page 29: ...ackloop The repeats knob is essentially a volume knob within the feedback loop It cuts the wet signal that goes back to the input of the delay circuit Each repeat that gets reduced in volume a little...

Page 30: ...ck loop The concept is exactly as the normal echo mode feedback loop just discussed in step 7 but the outputs of both chip A and Chip B are being looped back in parallel into the input of chip B rathe...

Page 31: ......