, view all tags

Here is a schematic of the timer circuit. The component packages are not identical to the ones used. Nevertheless we also attach a PCB layout, to give a better representation of a possible geometrical arrangement. We use a 9V battery as the voltage source. The time delay fuses have not been installed and tested yet. Up to now we used a fixed 1-3 M resistor for R1, we have to test whether our 1M pot is sufficient. Please note that electrolytic capacitors and LEDs are polarized. The relay has only 4 connectors, check the datasheet for proper connections. First test the circuit without the resistive wires. The resistive wire gets hot, so be careful not to touch it.

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf PCB__balloon.pdf r1 manage 17.6 K 2008-08-23 - 17:00 PeterKammel  
PDFpdf TARGET__balloon.pdf r2 r1 manage 15.1 K 2008-08-23 - 05:02 PeterKammel  
Edit | Attach | Watch | Print version | History: r4 < r3 < r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions...
Topic revision: r2 - 2008-08-25 - PeterKammel
  • Edit
  • Attach
This site is powered by the TWiki collaboration platform Powered by PerlCopyright © 2008-2021 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback