due to the ongoing covid-19 outbreak in new zealand we are expecting shipping delays on all international orders - thank you for your patience

effect send and sync restoring circuit – adapted from a Gael Jaton design

SKU: P004 Category:


sync_ope is a companion circuit for analog glitch & circuit bent video instruments. it preserves the sync pulses from the original signal and allows for smooth mixing between clean (dry) and distorted (wet) video. preserving the sync pulses means the distorted video is less likely to drop out (blue screen) when sent to analog video decoders such as in projectors, capture cards and digital tvs

note: this circuit requires either an existing dual_psu or a (less common) ac-ac wallwart to operate (that you must source separately) if you are confused / prepared to wait i write some thoughts about a potential revision which could improve this here

– knob for physical control over dry/wet external effect
– cv jack (0-1v) for sequenced control over dry/wet external effect
– external video send & return over rca or 3.5mm jacks

this project – like everything in the underscores catalog – is fully open-source hardware – find all the source plus lots more information and guides on the github repo:

Additional information

Weight 160 g
video format

pal/ntsc (with calibration)

input type


output type


power supply

9-12v AC, barrel jack (regular DC switching will not work) OR +/-12v eurorack header