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13 

Now connect your audio probe to pin7 of IC4_B. Adjust GAIN1 until the volume output is approximately the same
as the volume input on pin7 of IC6 (this balances the signal volumes between the two BBDs).

Disconnect the power supply from the circuit and install IC7. Reconnect the power supply.

Connect your audio probe to pin3 or 4 of IC7. Do the same type of adjustment to BIAS2 to get clean delay output.

Re-connect your audio probe to pin7 of IC4_B. Make any adjustments needed to GAIN1 to reach the same
volume output you had before. This part is a bit of fine tuning between GAIN1 and BIAS2 to get the optimal result.

Leave the BAL trimmer in the middle position. Connect your audio probe to pin1 of IC4_A. Adjust the GAIN2
trimmer until the output is the same or slightly above the volume input of pin7 on IC6.

You are done!

If you are using the BBD expansion board, refer to that documentation on how to do this procedure with four BBDs. It is 
generally the same thing with a few added steps. 

Mouser Cart 

For convenience, I have created a cart in Mouser that includes most of the items in the BOM. All the items highlighted in 
blue are in the cart in the correct quantities. Items in yellow are not included in the cart. Caveat: I have not personally 
ordered this cart. It was made using my "best guess" on the parts I would order for this project. 

http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=16a26046e1

 

Also, 

this cart does not include the quantities needed for the TRXPN

 board. However, those parts and values are 

already listed in the Mouser cart. Simply put in the additional quantities needed for the resistors, caps and trimmers for the 
TRXPN board. 

Содержание Total Recall

Страница 1: ...anpedals 3 34 W x 3 875 H Terms of Use You are free to use purchased Total Recall circuit boards for both DIY and small commercial operations You may not offer Total Recall boards for resale or as part of a kit in a commercial fashion Peer to peer re sale is of course okay ...

Страница 2: ...2 ...

Страница 3: ... R13 51k R44 100k C13 33n C44 10uF R14 16k R45 6k8 C14 1uF C45 10uF REG LM7915 R15 33k R46 39k C15 220n C46 100uF R16 33k R47 15k C16 2n7 GAIN1 100k R17 1k R48 3k3 C17 2n7 GAIN2 100k R18 100k R49 13k C18 4u7 BIAS1 100k R19 680k R50 910k C19 47n BIAS2 100k R20 100k R51 910k C20 2n7 BAL 5k R21 16k R52 120k C21 2n7 R22 16k R53 7k5 C22 4u7 CH VB On On R23 33k2 R54 27k C23 1uF R24 24k3 R55 27k C24 1uF ...

Страница 4: ...arbon Film 1 4W 2u2 1 Electrolytic 25v Min 24k3 1 Metal Carbon Film 1 4W 2u2 1 Non Polar 25v Min 27k 2 Metal Carbon Film 1 4W 4u7 3 Electrolytic 25v Min 33k 2 Metal Carbon Film 1 4W 10uF 4 Electrolytic 25v Min 33k2 1 Metal Carbon Film 1 4W 47uF 1 Electrolytic 25v Min 39k 2 Metal Carbon Film 1 4W 100uF 1 Electrolytic 25v Min 47k 1 Metal Carbon Film 1 4W 470uF 1 Electrolytic 35v 51k 1 Metal Carbon F...

Страница 5: ...5 ...

Страница 6: ...6 1590BB Tall Drill Guide 7 08 W x 8 1 T ...

Страница 7: ... do not pick up any clock signal The indicator LED can be soldered directly to the PCB If you are using the TRXPN board refer to that documentation on how to install the expansion board properly If not be sure you jumper XS and XR pads together on the lower right of the TR PCB ...

Страница 8: ...hey do not pick up any clock signal The indicator LED can be soldered directly to the PCB If you are using the TRXPN board refer to that documentation on how to install the expansion board properly If not be sure you jumper XS and XR pads together on the lower right of the TR PCB ...

Страница 9: ...w amazon com Electro Harmonix US24DC 100 24V Power Supply dp B0042RHT4M You should be able to use an 18v supply instead of the 24v one listed above although this has not been tested You will need to do a couple things 1 Lower the value of R57 from 240R 1W to something like 22R 1W and 2 make sure you know what the polarity of your 18v power supply is before hooking it up to the TR PCB It s expensiv...

Страница 10: ...ck before wiring it to the PCB and use your multi meter to verify which lug on the jack is negative DC Once you have verified polarity on the jack hook up the PCB to the power supply Now check the LM7915 regulator to verify that you are getting about 15v output Once that is complete disconnect the power and start loading in the ICs EHX power supply wiring for positive ground The clearance in the f...

Страница 11: ...s of the chip pins 3 and 4 The output is the delayed signal where the delay time is controlled by the two out of phase clock signals pins 2 and 6 generated by the CD4047 and processed through the sequential bucket steps The two outputs are mixed together and then sent to a gain recovery stage This helps make up any volume loss introduced by the sequential steps in the BBD 2048 steps for MN3008 and...

Страница 12: ...ull up FDBK a little less than halfway up MOD all the way down LEVEL about 1 3rd up BLEND doesn t matter you should leave the circuit output disconnected since we will be audio probing CH VB switch doesn t matter Leave all the trimmers in their halfway position to start Connect the TR PCB to your power supply Use an audio source at the input of the circuit J1 While you can just strum your guitar i...

Страница 13: ... until the output is the same or slightly above the volume input of pin7 on IC6 You are done If you are using the BBD expansion board refer to that documentation on how to do this procedure with four BBDs It is generally the same thing with a few added steps Mouser Cart For convenience I have created a cart in Mouser that includes most of the items in the BOM All the items highlighted in blue are ...

Страница 14: ...48 7 4 71 7 7 48 7 7 45 7 6 76 8 0 00 8 12 99 8 0 00 8 0 00 8 0 00 9 12 99 10 6 76 11 8 48 12 12 99 13 0 00 14 12 99 15 12 99 16 13 76 BBD DC BBD DC CD4047 DC 4558 DC LM7915 DC 1 0 00 1 0 00 1 7 94 1 vaires I 25 57 2 7 48 2 7 49 2 7 09 2 7 14 G 0 00 3 10 12 3 9 71 3 6 91 3 vaires O 15 00 4 10 12 4 9 70 4 0 00 4 15 00 5 14 99 5 15 00 5 0 00 5 7 14 6 7 49 6 7 49 6 0 00 6 7 14 7 7 66 7 7 45 7 15 00 7...

Страница 15: ...15 ...

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