Yup I have some 1k,2k,4ks to play with after I finish Grobb's. Only 1 1/2 chapters left. Cost-wise compared to what's on a UNO at it's price they ought to be almost free instead of a buck a pop.
LOL! SMD ain’t gonna save space for the ICSP headers. And no one said nothing about not using SMD for the half dozen external components. The whole thing fits within a 16 pin dip footprint (less the switches). rd. ButDude, ever hear of SMD? I could fit all that a few times over in that space.
A momentary switch can be used, but it increases the circuit complexity as now there has to be an electronic toggle circuit instead of a mechanical toggle switch. Not a huge deal, but more parts to solder. I"ll see if I can whip out a schematic. A 74AC14 can be the oscillator, toggle flipflop, and LED drivers. What is the power supply voltage?AnalogKid, your suggestion makes the most sense, to me, I'm just not clear on the way the switches should be wired. And would a toggle or rocker be absolutely necessary, or could a momentary or something else be used? I've got lots of little momentary switches, and back to SamR, I've got a bunch of those slide switches, as well! I'd love to hear more or see how the circuit you're describing would be wired.
This sounds great! And I am indeed in the US. Atlanta, GA.It will be tight but all will fit inside the box. Battery, CR11108, CR1/3N, 3V Li, 11.6mm D X 10.8 mm H, 160 mAh. C555 with one SM transistor driver or my favorite Nch. LL FDD6530A SMT; SWs opposite LEDs and on same end under the cover.
Adding a diode to C555 ckt. could cut duty cycle to 30% to save juice.
Mounting board is 1 mm fiberglass. Wire is 30 Ga Kynar wire wrap wire.
If you were in USA I or we could supply most of the parts.
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by Jake Hertz
by Jake Hertz