All one needs to know about an inductor may be found by applying voltage and monitoring current. I have been using this homemade gadget for a while: big ass MOSFET driven by an appropriate gate driver, 555 timer (with toggle switch to change ranges and trimpot for fine adjustment), low L shunt and bunch of caps to keep voltage stable. 3-rd year EE student could do it (IMHO). OK, one needs to know what s/he is doing as layout does matter. The problem: every time I drop the jig, I have to fix something as assembly leaves much to be desired. Well, not exactly, but it looks ugly. BOM (including PCB) should be between $5 and $20 (depending ob quantities), shouldn't it? Does anybody sell gadget like this? P.S.: It is taken for granted that a lab has oscilloscope and power supply.
- posted
16 years ago