http://www.intio.or.jp/jf10zl/bms.htm
http://www.uoguelph.ca/~antoon/circ/555test.htm
using an af transistor as dc amplifier.
http://www.rlocman.com.ru/am/a05004.htm
http://members.tripod.com/michaelgellis/scope/atten.html
http://octopus.freeyellow.com/99.html
Convert an oscilloscope into an indispensable component tester and troubleshooting tool. Test Equipment.
http://www.wenzel.com/pdffiles/curve.pdf
off-the-shelf battery powered digital hour meter to be turned on and off
http://www.imagineeringezine.com/PDF-FILES/hourmtr.pdf
It can be used to determine device type (NPN or PNP) and the base
http://www.imagineeringezine.com/PDF-FILES/xistrtst.pdf