The Faux Spring Reverb, like many pedal reverbs is based around a Belton reverb module. Originally it used the BTDR-1 (which is massive), but in this layout I've adapted it for the newer and smaller BTDR-2H. I've also simplified the power section a little, and used a TL071 for the second IC. In the original a TL072 was used, but only used half of it. Here's what Brian has to say about his design: The great thing about the Faux Spring Reverb is that it retains the Analog base tone, doesn’t send your signal through digital/analog converters and back again (wrecking your tone completely) allowing you to be as springy as you like without your sound becoming lifeless, dull and… well, bad. With the tone control, you can control your sound completely and have your reverb be as bright as day, or dark as night… As lively and bright as a small hall, or as deep as the biggest cathedrals. Edit: I realized this afternoon that the Depth pot would hit the Belton brick, so I've changed it to a 9mm pot and it will clear the brick. The whole thing will be really snug, but it should be doable.
This is an Audio amplifier PCB 2N3055. here used 2 transistors. both transistors are the same NPN transistors
Switching it up this week and doing a Filter Friday. This one could be used for both synth and guitar/bass. It's a cool filter effect based around the LM13600/13700.
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More Circuit, PCB layout! This just shares PCB Power Amplifier, Tone Control Speaker Protector, etc. You can see all about PCB Desig...
Here's a cool dirty reverb effect by Death by Audio. It uses a Belton brick like many other designs, and offers clean reverb with the gain control turned all the way down. But when you increase the gain, fuzz is infused to the signal. You can mount the Belton brick to the board from the solder-side (best to do this once the rest of the board has been populated). It'll probably be too tall with the brick to fit in a 1590B, but a 125B should work just fine.
In this project, I will share about class-d power amplifier using TL494 IC for PWM, and use N-Channel MOSFET transistor as the final ampl...
Found this one over on FSB. It was designed by Induction and takes elements from the GGG D-Verb, BYOC 2-Knob, and CultureJam's Box of Hall. Like those designs it uses a Belton BTDR-2 reverb brick, which can be mounted directly to the board from the solder-side. If you want a wetter sound, replace the marked resistors with the values listed in the layout below. You may be able to fit it in a 1590B, but I'd go with a 125B. Here's the thread of FSB for reference.
Got a request to make a layout for this schematic, and it turns out it's the BYOC Reverb 2. You can use 9mm pots and board mount them from the component side if you like. There are a few jumpers, though one of them (the one by the lower IC) can be eliminated if you just stretch out that 22k resistor. Also, the electrolytic caps are folded down on their side so things will fit with board mounted 9mm pots. The Belton BTDR-2H can also be board mounted from the solder side. Don't feel like making the board yourself? You can buy a PCB or a complete kit from BYOC.
The originals used a now nearly unobtainable SAD512D chip, but the wizards on FSB converted it to work with an MN3007. Now that those are also hard to get a hold of, I've laid this out for an MN 3207–which is almost the same as the 3007, just with a slightly different pinout for power and ground. But if you want to use a 3007, I've included a daughter board that will let you use it (it will also work to use a 3207 in place of a 3007). This will best fit in a 125B and the schematic can be found here.
Got a request for this one for Fuzz Friday. Originals fetch crazy prices online. It's an octave fuzz with a clean blend. If you want a fabricated version of this, check out the Corn Cobb on the store.. Schematic over on FSB. Should squeeze nicely in a 1590B.
Today marks the one year anniversary of this blog. Thanks to everyone for your comments, verifying layouts, and just generally being really cool people. To celebrate, I give you a really cool and crazy delay, the Casper Electronics EchoBender. The EchoBender is a development of/modified Deep Blue Delay. I couldn't quite get it to fit with on-board pots in anything smaller than a 1590BB, but the original is in a giant wedge enclosure, so I guess it's still an improvement. If you feel like wiring 6 pots off-board, you should be able to fit it in a 125B or even a 1590B. From Casper: The Echo Bender is an echo, distortion and experimental, stand alone noise generator. It’s capable of creating smooth, clean echos as well as delving deep into screeching, noisy realms seldom heard from a traditional echo pedal. Here's the link to the 1590BB drilling template.
Here's one from MXR you probably haven't heard of before. It was apart of their Commande line of plastic boxed effects from the late 80s. They aren't highly regarded because of the plastic, but the circuits were pretty well designed. The circuit in question today is a better design than the DynaComp, offering less distortion and more sustain. It does have a little less compression range than the DynaComp, but also less noise. (And really, who needs that much squish? haha) Couldn't find a demo of this one, but the schematic and discussion can be found here on FSB.
Here's a really simple "transparent overdrive" circuit that was a must have a couple years ago. People compared it to the Klon and Timmy drives. Originals use paper in oil caps, which some claim sound better than modern film or ceramic caps. That's a debate for another time though. I've drawn it up so you can use big mojo caps, or with more common caps for a much smaller footprint. Both versions have a couple tweaks. In the mojo layout, I've added a pull down resistor after the gain pot to try and eliminate footswitch pop. In the smaller layout, I've added some optional clipping diodes (which I think really improve the sound of this thing), and power filtering and polarity protection.
Here's one of the most classic effects of all time, the Cry Baby wah-wah from Dunlop. The big red thing in the layout is the Fasel inductor, and there's room on the board for a pull down resistor at the input if you need it, I just didn't include it in the drawing. What else is there to say? Just build it!
Hello DIY'ers, I will share the schematic and PCB layout for Fullbridge with PFC (Power Factor Correction) Switching Mode Power Supply...
There are now 4 version of the OCD. The latest has a few guitarist I know wondering what was wrong with the last version, so if you're looking to go back to the original circuit, this layout is for you. The OCD one of the most respected overdrives out there. Derived from the Voodoo Drive, it uses two 2N7000 mosfets for clipping. I opted to make the tone pot offboard to allow a little more freedom with pot placement in the enclosure. Might not be a bad idea to use long leg pots for the Drive and Volume pots.
Last post of 2014. Happy New Year, everybody! Here's the early 80s DOD FX55 Distortion, without the original switching circuit so you can wire it for true bypass. The original used a TL062 dual op-amp, but the 2nd half of it wasn't in the signal path all, so I went with the single TL061. The off-board wiring pads aren't as neat as I'd like, but I wanted it to fit in a 1590a. You could fairly easily use this same layout to make the DOD FX50 overdrive with the following mods: • Change the 1k resistor to 4.7k • Change the 3.9M resistor to 1M • Place a 1n capacitor between lugs 1 and 3 on the Level pot
The Brassmaster was originally designed for bass and also picked up by guitarists. The circuit is very unique and originals are hard to come by. I was able to lay it out to fit in a 125B with board mounted pots.
ESP32 is an upgraded version of the ESP8266 module developed by Espressif Systems. This article presents new ESP32 projects that you can try this year.
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Make Circuit Boards With Lasers: A homemade circuit board is only as good as the mask you put onto it. No matter what method you use to do the actual etching, you still need to stick an image of your circuit onto the board, and make sure it leaves crisp, clean, solid traces behind …
Stumbled across this effect while looking for a completely different schematic. It's a low cost chorus designed by Merlin Blencowe (here's his schematic for reference), using a PT2399. It generates deep modulation and a very thick warble (here's a sound clip).
Someone showed me this circuit and it's a cool addition to this library. It's an old project from Electronics & Music Makers magazine and allows you to ramp up and down your volume. It's not a true-bypass pedal, but essentially an always-on boost that increases your volume when the momentary footswitch is pushed. More info and schematic can be found in these scans:
Got several requests for this one. Basically, it's small preamp to plug into a mobile device for use with apps like iRig. Pretty simple circuit. Shouldn't be hard to fit in a 1590a or even smaller since you don't need to include a footswitch.
Somehow I've not laid this classic out already, so here's the Ross Compressor. One of the most highly thought of (and therefore copied) compressors of all time. Should be an easy fit in a 1590B.
Stumbled across the schematic for this compressor and couldn't find a layout for it. So I drew it up. This follows the original red box version, not the black box reissue. It's an optical compressor and apparently fairly subtle. I couldn't find any info on the vactrol used in the original–sockets are your friend. Should be an easy fit in a 1590B.
You guys super pestered me to do this one, so here it is. Now get off my back! 😄 Layout turned out fairly big, but not overly so. It should fit nicely in a 1590BB.
The classic '70s overdrive by MXR, and is essentially the same as the DOD 250 and Ross Distortion. I designed the layout to have onboard pots, to alleviate some offboard wiring. It also has the LED resistor on the board, again to reduce offboard wiring a bit. It'll fit perfectly in a 1590B enclosure. Might be a good idea to socket the diodes. The original had germanium diodes, but silicon diodes or LEDs will sound good as well (just different).
Happy #FuzzFriday! Got a request for this one. It's the classic silicon Fuzz Face circuit with a few added components.
The JHS Morning Glory is a modified Blues Breaker overdrive, but with an added JFET output buffer to increase the volume. The original Marshall circuits barely made it above unity with the volume maxed (see the video below), so the output buffer is a good improvement over the original. There's also a high cut switch to help tame single coils a bit. I wasn't quite able to get the on-board pots to be in the exact layout as the JHS units (the Tone control and High Cut switch are reversed), but it's close enough. You should be able to board mount the SPST high cut switch as well.
The XB-70 is a clone of the Captain's personal '77(?) Guild Foxy Lady, which were built by Electro Harmonix and generally very similar to Ram's Head Big Muffs. In the Captain's own words, "It sounds like torn leather soaked in piss and salt smushed lovingly into ears... It is a brute of a pedal, has a really intense roar at full tilt, like any good Big Muff really." I used my old Ram's Head layout as the starting point, but altered the pot placement and it should be a nice fit in a 125B now.
