My Intelligent Curve Tracer - Page 1
Forum section: electronics / projects

author: locky_z
author_rank: Newbie
timestamp: February 01, 2012, 12:18:12 pm
content: It use USB or RS232 interface communication with PC and show the semiconductor curve in PC screen.It can measure BJT's Ic->Hfe curveCan measure Vce-Ic curvemeasure some semiconductor transmission curve,such as Vbe-Ic / Vgs-Idalso FET’s Vds-Id curve measure,Even can study Vgs & Rds relationshipUpper is six IRF630 Vds-Id curves,their Vgs is 5V 6V 7V 8V 9V 10V.The Vds-Id curve only show Vds=0~1V range,so you can use system’s calculate function get the slope value,The window in the central show six curve’s slope, Measurement unit is V/mA, multiplicate 1000 is Rds,So under Vgs=10V,Rds is 0.000334649870637804*1000=0.334ohmSome diode V->I curvefllower is TL431 in all current range V-I curveif you plug TL431 into socket B and E,and change the measure condition,you can see less current VI curve. The following figure , Y-axis is only 0~0.38mAthe Intelligent Curve Tracer is more powerful,It can measure 3 terminal voltage regulator’s Vi-Vo / Io->Vo Curve

author: locky_z
author_rank: Newbie
timestamp: February 01, 2012, 12:24:25 pm
content: Actual circuit1.three channel power amplifiers2.power supply and protect circuit3.MCU & ADC & DAC & Control circuit4.USB and RS232 interface circuits

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 01, 2012, 01:21:09 pm
content: ok... where to buy this stuff?

author: amspire
author_rank: Super Contributor
timestamp: February 01, 2012, 01:58:06 pm
content: locky_z, that is a brilliant piece of work.Richard

author: nanofrog
author_rank: Super Contributor
timestamp: February 01, 2012, 02:24:16 pm
content: Nice!Would you be willing to post PCB layouts (or even the gerbers)?

author: locky_z
author_rank: Newbie
timestamp: February 01, 2012, 03:15:04 pm
content: You can buy it fromhttp://www.aliexpress.com/product-fm/526060154-Intelligent-Curve-Tracer-wholesalers.htmlEven if you have a PCB, but no MCU HEX file is no use.

author: nanofrog
author_rank: Super Contributor
timestamp: February 01, 2012, 03:41:51 pm
content: Thanks.Shipping's awful though.

author: Unknown
author_rank: Unknown
timestamp: February 01, 2012, 03:44:55 pm
content: Nice work!But the way you are selling it does not make much sense to be honest. Is it the prototype that you are selling or maybe you are selling them one by one from a small hand assembly run?

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 01, 2012, 04:02:58 pm
content: Quote from: locky_z on February 01, 2012, 03:15:04 pmas expected. nanofrog should ask the hex as well, aliexpress? duh! make it to ebay... can? and make it cheap!

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 01, 2012, 04:09:14 pm
content: $159? i'll wait another daysaw the teardown. there are some serious sh*t relays and power transistors over there, i cant imagine how much effort you've put into this thing (HW and SW) salute!

author: locky_z
author_rank: Newbie
timestamp: February 02, 2012, 07:34:44 am
content: I has been registered on ebay,but can‘t sell,because ebay can't let me to 'go through an additional verification step' (???eBay??).So I only sell in aliexpress, the aliexpress web automatic generation $101 ship fee unless you set free shipping.But aliexpress and ebay is 'competitive relation'.So aliexpress can't use palpay after 2011.08.

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 02, 2012, 08:17:50 am
content: Quote from: locky_z on February 02, 2012, 07:34:44 amtrue they are competetive. but both are customers to the eyes of paypal. there must be reason why paypal doesnt sell to aliexpress anymore.

author: nanofrog
author_rank: Super Contributor
timestamp: February 02, 2012, 03:30:18 pm
content: Quote from: Mechatrommer on February 01, 2012, 04:02:58 pmI actually thought that the OP was going to make the project freely available after the first post rather than sell it in finished or kit form, given the lack of any links (presumed that the hex files would be provided with PCB artwork/gerbers BTW). How foolish of me...

author: sorin
author_rank: Frequent Contributor
timestamp: February 02, 2012, 05:17:56 pm
content: Quote from: Mechatrommer on February 02, 2012, 08:17:50 amof courseEbay has bought paypal some years ago!!Did you get it now??