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Fotofori robusti
Batterie
- 2 x NiMH
- 2 x Alcaline
- 1 x LiFePO
LED
- XREWHT-L1-0000-007E7 3000K, 67.2 lm @ 350 mA
- XREWHT-L1-0000-007F8 2900 K
Capacitive Touch Sensing
http://ww1.microchip.com/downloads/en/AppNotes/00001334B.pdf Techniques for Robust Touch Sensing Design
- http://ww1.microchip.com/downloads/en/appnotes/01171c.pdf How To Use The Capacitive Sensing Module (CSM)
- http://ww1.microchip.com/downloads/en/AppNotes/01103a.pdf Software Handling for Capacitive Sensing
buck converter
IRLML2502 http://www.irf.com/product-info/datasheets/data/irlml2502.pdf
- http://www.onsemi.com/pub/Collateral/TND388-D.PDF Effects of High Switching Frequency on Buck Regulators
- http://www.ti.com/litv/pdf/snva598 Driving LEDs: To Cap or Not to Cap
- http://ww1.microchip.com/downloads/en/appnotes/01427a.pdf AN1427 High-Efficiency Solutions for Portable LED Lighting
- http://ww1.microchip.com/downloads/en/appnotes/01047a.pdf AN1047 Buck-Boost LED Driver Using the PIC16F785 MCU
Buck Boost
Current sensing
- http://ledsmagazine.com/features/10/10/15
- http://www.aosmd.com/res/application_notes/power-ics/PIC-007.pdf Selection of Three Locations of Current Sense Resistor in Buck Converter
Sincrono
- http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en560160 Efficiency Analysis of a Synchronous Buck Converter using Microsoft Office Excel-Based Loss Calculator
High Side Drivers
- http://www.linear.com/product/LTC1982 Micropower High Side Switch Controllers in SOT-23
Asincrono
- duty cycle
- up
- (3.3 ∕ 4.8) = 0.68
- down
- 0.31
- efficienza
- 0.31 ⋅ (0.385 ∕ 3.3) ≈ 0.03 di perdita sul diodo
- http://www.st.com/web/catalog/sense_power/FM64/CL1571/SC541/SS1617/PF64858 Low Drop Power Schottky Rectifier 1A/0.385vf
- http://www.st.com/web/catalog/sense_power/FM64/CL1571/SC541/SS1617/PF64876 2A/0.43vf
uC
http://ww1.microchip.com/downloads/en/DeviceDoc/41441B.pdf
Mappa pin
pic12f1840
| Pin | Funzione | Nome | porta sul uC | I/O |
|---|---|---|---|---|
| 1 | VDD | |||
| 2 | led_rosso | RA5 | O | |
| 3 | cps_spot | RA4/AN3 | I | |
| 4 | led_verde/mclr | MCLR | RA3/MCLR | O |
| 5 | pwm_spot | RA2/AN2 | O | |
| 6 | cps_flood/ICSPCLK | RA1/AN1 | I | |
| 7 | pwm_flood/ICSPDAT | RA0/AN0 | O | |
| 8 | Vss |
- http://www.element14.com/community/servlet/JiveServlet/downloadBody/27644-102-1-76820/01138A.pdf
- http://ww1.microchip.com/downloads/en/devicedoc/41214a.pdf PICmicro® CCP and ECCP Tips 'n Tricks
- http://www.epd-ee.eu/article/8346 10 LED Driver Problems Solved by the PIC12HV752 MCU
Step up
- http://www.linear.com/product/LTC3490
- http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP1643
- http://www.ti.com/product/tps61085
- http://www.instructables.com/id/Make-a-microcontroller-based-boost-converter/?ALLSTEPS
- http://diodes.com/datasheets/ZXSC380.pdf semplicissimo, 200ma max, ok come emergenza
- http://www.ti.com/product/lm3410 2.5 - 6 v sot23 data sheet
- http://www.ti.com/product/lm3405a 1A, 3-22 Vin SOT-6
Riflettori
http://www.fraensrl.com/images/Fraen_FRC_Datasheet.pdf
Diodi
- http://www.diodes.com/datasheets/BAT750.pdf SOT23 40V 750mA
Prototipo
Boost 350mA:
- due led 350 ma serie
- LM3410 http://www.ti.com/lit/ds/symlink/lm3410.pdf
- D http://www.diodes.com/datasheets/BAT750.pdf SOT23 40V 750mA
- L 10uH 1.2A (http://uk.rs-online.com/web/p/wire-wound-surface-mount-inductors/0573652/ nel proto)
- R 0.56 Ohm
Boost 700ma:
- 1 x XLamp XM-L EasyWhite http://www.cree.com/LED-Components-and-Modules/Products/XLamp/Arrays-Directional/XLamp-XML-EasyWhite
- LM3410 http://www.ti.com/lit/ds/symlink/lm3410.pdf
- R 0.28 Ohm ?
- STPS3L60S 3 SCHOTTKY http://www.st.com/web/catalog/sense_power/FM64/CL1571/SC541/SS1617/PF64890?referrer=70071840