Category: Stompbox

  • 22/7 4069

    22/7 4069

    First build of 2022! This is a 4069 version of RunOffGroove’s 22/7. The original uses the 4049 hex inverter. This the same circuit using the 4069. Both chips contain 6 inverters but the they differ in format and layout. The 4049 is a 16 pin DIP and the 4069 is a 14 pin DIP. One […]

  • Tim Escobedo’s PWM

    Tim Escobedo’s PWM

    Tim Escobedo was this wildly creative force in the early DIY Stomp Box community. His circuit snippets page was had a lot of really great ideas. One of the ideas there was the PWM, which stands for pulse Width Modulation. This circuit converts your input signal into a square wave and varies the amount of […]

  • UBE Screamer 4069

    UBE Screamer 4069

    This is a version of the UBE Screamer using the 4069 in place of the 4049. Essentially these chips are the same. They both contain 6 inverters. The 4049 is a 16 pin DIP while the 4069 is a 14 pin DIP. Electrically the should the same but the pin arrangement is different. The original […]

  • 22/7 4069

    22/7 4069

    Here is a version of RunOffGrooves 22/7 using the 4069. The original circuit uses the 4049 Hex inverter. The 4049 is a 16 pin dip with 6 inverters. Here is the 4049UBE data sheet. You can see it has 16 pins with 6 inverters. There is a power Vdd pin 1 and ground Vss pin […]

  • Another fail!

    Here is a UBE Screamer with blend knob. I left a resistor out of the mixer and mixed up the Blend and Gain labels.

  • UBE Screamer v2

    UBE Screamer v2

    I made an update to the RunOffGroove UBE Screamer from a suggestion in their notes. This version adds a mix control the blends some of the original signal with the distorted signal. The original uses Rx to set a fixed mix amount. The notes suggest a value of 100K to 470K for this resistor with […]

  • 1981 Inventions DRV clone.

    1981 Inventions DRV clone.

    Here’s a PedalPCB Informant. This is mostly the Rat circuit with a few changes. The biggest change is the addition of a charge pump. The charge pump provides a +9 and -9 volts power for the circuit to run off. Effectively this doubles the voltage. I have some reservations about the power supply. The clipping […]

  • UBE Screamer 1.1.1 build

    Built and tested the new version of the UBE Screamer PCB. Everything is working! Sounds great. This is a good alternative to the standard TS-808 and other overdrives if you’re looking for something a little different. Does great low gain sounds. I built this in a 1590B enclosure from Tayda. I got most of the […]

  • UBE Screamer 1.1.1

    UBE Screamer 1.1.1

    This is an update of the UBE Screamer board. Same circuit just revised. I had these boards fabricated at PCBWay.com. The quality is very great! The UBE Screamer is a very interesting take on the Ibanez Tube Screamer by RunOffGroove.com. It’s the general circuit topology of the TS-808 but uses CMOS inverters in place of […]

  • Wata’s Electro Sound Big Muff

    Wata’s Electro Sound Big Muff

    I heard this new song by Boris and it got me interested in the band again. This is apparently an add for a new EarthQuaker Devices pedal. If you haven’t heard Boris you should take a listen. They are on BancCamp here. Reading an interview with the guitar player Wata. It mentions the Hizumitas, her […]

  • Yet another Big muff

    Does the world need another? I wanted to do a Big Muff using those 9mm pots. These seem like they might be a good build option. I also wanted to setup this PCB to use the same part numbers that appear on all of the schematics not the Big Muff Page. This way it would […]

  • 22/7 PCB Order

    22/7 PCB Order

    I just got these PCBs in the mail from https://www.pcbway.comPCBWay.com. I’m impressed with the quality. This is an update of my my 22/7 PCB. I made a couple small improvements. The 22/7 is a CMOS based Big Muff. A very cool and innovative circuit by RunOffGroove.com. Did I mention they just turned 20 years! If […]