Using a PIC for this device provides a lot of useful functionality. The timing for the power pulse to the inductor is critical to getting the best Zap from your nine volt battery. The longer the current is on, the higher the voltage. Once the inductor reaches saturation, however, you are just wasting power. Some [...]
In this 2-7V power supply circuit, for our purpose, we chose IC 723 instead of a three pin voltage regulator forwhy we find it protean and more advantageous in technical details.
Heatsinks of Tr2 and Tr3 transistors must be sufficiently large.
To achive R4,R5 and R6 values, we used some suitable resistors in parallel. For R4 and [...]
This is a LM338 based power supply (with Short Circuit Protection) which is not complicated and easy to build. I am using the supply for a long time, have no problem yet. Only current adjust is missing but I overcome this situation by using an LCD panel ampermeter. There is no PCB for the circuit. [...]
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