Please, check our SMD/THT services -; from idea to ready devices                                                                                                                                   

Please, check our SMD/THT services -; from idea to ready devices                                                                                                                                   


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Our price:

599.00 PLN

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Weight: 0.7 kg

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Buy more, pay less:

  • for 2 pieces and more - 3% (581.03 PLN)
  • for 5 pieces and more - 5% (569.05 PLN)
  • for 10 pieces and more - 5% (569.05 PLN)
  • for 50 pieces and more - 5% (569.05 PLN)
Like Ask Tell


"Be aware that in the context of retro gaming, there are two types of csync signals:  TTL and 75 Ohm.  Most displays and processors will require 75 Ohm csync, but some can accept TTL.  As a general rule, unless your setup specifically requires otherwise, your target goal is that the cables you use with your consoles will all be outputting a 75 Ohm signal and the target device will also be receiving a 75 Ohm signal."  RetroRGB 


Before buy, be sure You have proper 75Ohm sync cables.  




Fully automatic SCART switch with full galvanic inputs separation.  (BOLD - introduced in REVISED version)

  • 5 scart inputs ( RGB, s-video, composite)
  • 1 scart ouput
  • Extra protections for NCS CHIPS on each scart input
  • Improved signal detection histerisis / all cables shall work now/
  • "Knight rider" style active scart detection
  • full ROHS
  • AVR controller with firmware future updates
  • HQ metal case powder coated
  • STEREO RCA audio output 
  • headphones JACK amplified audio ouput (adjustable volume via remote)
  • IR controlled
  • manual/automatic mode
  • DC/AC 5/2.1 mm power supply connector (suggested 9V, polarity indepdendent); optonal power supply sold separtely - please, check RELATED PRODUCTS tab above
  • Dedicted remote sold separately - soon; thus You can always use any NEC/ENEC compatible one You may already have - Please, check FAQ tab above


How doees it work ?

Imagine, You have many retro system in use. Amiga, Atari ST, ZX spectrum, etc... And You have only one classical TV/Monitor with one SCART INPUT. Each time, You want to switch system, You have to connect Your machine to Your monitor. Everytime, You do it - You damage scart socket inside. Those days are over. Connect up to 5 computers/consoles to HYDRA, then connect HYDRA to Your TV/Monitor and power on hydra. Since now, HYDRA will detect active scart input and forward all signals to Your monitor. Simple and efficent.


Please, remember:


NEVER connect / disconnect SCART PLUGS 

when HYDRA is ON

especially when CONSOLE/SYSTEM is ON !



You may ask why..

           Designing device, I put much effort  into ability to  passthrough many types of signals: from composite to component. To protect device and not to cut signal`s range, HYDRAs have additional ESD protection diodes, but for a short period of time when scanning for active scart, Hydra is defenseless. If You got hit that moment plugging powered on device, You will damage RGB chip with ESD voltage that may reach thousands of  volts (not dangerous for you, but electronics is fragile..). This chip may become very hot and protection will probably brick hydra till one of chips is replaced (NCS2564). Cost of repair is 10Euro !!!


Possible symptoms:

  • knight rider effect stops
  • one scart port doesn`t work
  • Interferences between ports
  • HD led doesn`t work anymore




  • No tricky electronics inside as NOT NEEDED. Hydra has built in all necessary features
  • Hydra loves composite video or luma at pin 20 of scart
  • When You have fun, Hydra does plenty of work – let it work
  • Hydra doesn`t like and will not lock on scart with TTL csync as it doesn’t follow scart 75ohm standard – nevertheless source connected directly to Your TV works OK




  • left - scan for active source to the left from active one (if active is far left, no action)
  • right - scan for active source to the right from active one (if active is far right, no action)
  • middle - HD/LOW PASS filter - default ON
  • left right pressed - disables "knight rider led effect"





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Please, refer to HYDRA MINI FAQ