Specifications

8
Connect the LED between the points LD1 and the earth (-).
Connect the + and - of the battery direct to the + and - connections of the circuit.
Remark: switching the + and - connections by mistake will only cause IC1 to be destroyed,
because the rest of the circuit is protected by D7.
Turn both trimming potentiometers to their minimum position (completely to the left). The LED should be flashing now.
13. Test & Usage
Test & usage
- +
+
-
Fig. 1