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Last Updated:
Tuesday, February 02, 2010 04:31 AM
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Featured Circuit of the Week |
Ultra Low Current Oscillator #4
The circuit below was inspired by a programmable unjunction transistor (PUJT)
circuit sent to me by Karl Isbrecht. In Karl’s circuit, the unijunction
circuit made click sounds in a speaker and consumed very little power. His
circuit reminded me that a PUJT circuit could be made using a couple common
transistors wired in a configuration like a SCR. In the circuit below, the
output of the two transistor pulse generator is connected to a CD4013 dual
flip/flop..... |
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collection of resources for inventors,
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Dave
Johnson & Associates -
consulting services for new products from conception to
production or improving the
cost & performance of existing products |
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David A. Johnson, P.E. is an
electronics engineer with over 30 years practical experience in
the areas of analog & digital design, fiber optics and RFID. Electronics is his
vocation, hobby and passion. He is a published author with articles and designs in
EDN, Electric Design, Midnight Engineering and Popular Electronics. Throughout
his career, Dave's imaginative approach to design has resulted in applying new
technologies in creative and cost saving ways. |
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