| Electronics > Projects, Designs, and Technical Stuff |
| Valentines Day Project for my girlfriend |
| (1/3) > >> |
| Thermal Runaway:
Hi everyone, Just a quick project I did for my girlfriend this Valentines Day, 2010. It's just a real simple Multivibrator circuit, with the Q and !Q lines fed to some output FETs. The reason for such large output FETs was that I also intended to make an incandescent version which would have required much larger current switching capability. Check it out here: Brian |
| Zero999:
Good work. Did you use a separate IC/transistors for the multivibrator? You can make a simple astable with a couple of MOSFETS - no other active components required. You can also buy pink LEDS to make it a bit more romantic. A 555 timer is also another simple option. |
| Thermal Runaway:
Yeah I just used the standard multivibrator template circuit - two transistors and an RC circuit to alternately switch each transistor on/off. Then some output FETs to power the LEDs. I took a look at the pink LEDs but, unfortunately, I didn't have the time to perfect my PCB design to allow for current limiting resistors (I was trying to fit this between work and Uni). So I just used some LEDs with built in current limiting components, which simplified the PCB design. I couldn't find any pink LEDs in that form. She likes it anyway :) Brian |
| Thermal Runaway:
Next year I think I'll plan something a lot more ambitious :) |
| migsantiago:
Hi, nice project. How did you arrange the LEDs into a heart form? What software did you use for the PCB? Thanks! |
| Navigation |
| Message Index |
| Next page |