Extended Data Fig. 3: Circuit diagram of the pacing system.
From: Modeling heart rhythm using human engineered heart tissues
a, When both pins 9 and 12 are off, the circuit is open and there is no current flowing through the load (EHTs). b, When pin 9 is on, and pin 12 is off, the current passes the EHTs from left to right (shown in red). c, When pin 9 is off and pin 12 is on, current passes the EHTs from right to left (shown in blue).
