Z80_4500D - 12V 5A Laser & LED Buck Driver w/ Fan - TTL/PWM adjustable CC/CV | Barnett Unlimited
DYKB DC 12V TTL 405nm 445nm 450nm Laser Diode Driver Board Step-down Constant Current Drive Circuit TTL Modulation Power Module - AliExpress
SPDT Failsafe DC to 26.5 GHz Electro-Mechanical Relay Switch, TTL, 90W, 12V, 2M Lifecycles, Suppression
Converter TTL to ± 12V - CircuitLab
The optoTTL b-12 system can be used for the optical transmission of 12 volt 16 channels digital signals or for overcoming greater distances or for eliminating problems with mass potentials. Manufactured by