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FET preamp square control panel
by
midwayfair.
2
layer board of
1.27x1.50
inches
(32.21x38.02
mm).
Shared on
January 30th, 2017 00:51.
Control panel for mic preamp (square, fits in 1RU)
cooling-pcb.brd
by
cwinans.
2
layer board of
1.15x1.25
inches
(29.16x31.75
mm).
Shared on
January 30th, 2017 00:09.
FE03 Pedal Board v1
by
cwinans.
4
layer board of
4.39x4.39
inches
(111.43x111.43
mm).
Shared on
January 30th, 2017 00:04.
32u4 Stick
by
Senil888.
2
layer board of
1.67x1.32
inches
(42.32x33.45
mm).
Shared on
January 29th, 2017 23:11.
A small USB stick with an ATmega32u4!
BLF driver DDm-20 [rev00][tried & tested]
by
DEL.
2
layer board of
0.80x0.80
inches
(20.32x20.32
mm).
Shared on
January 29th, 2017 21:31.
BLF flashlight driver, 20 mm, DD+m
Features
- 20 mm direct drive + 350 mA regulator LED driver
- No OTC - Intended for e-switch, memory-decay or no-memory firmware.
- R5 to eliminate unintentional Vcc boosting during PWM.
- R3, R4 for stable drive of FET.
- Oversized heat plane for the 7135 with good thermal link to the ground ring.
- Generous 0603 pad sizes that will accept 0805 parts as well.
- Universal package size for MCU. Tiny13-85 fits.
Revision changes
- New
Suggested parts list
- U1: Atmel Attiny25, SSU or SSN package
- U2: 7135 350 mA LED driver
- Q1: Vishay SiR800DP
- C1: 10 uF, X5R or better, 0805
- D1: Schottky diode, 200 mA 20 V or better, 0805 or SOD323
- R1: 22 / 330 kohm, 1%, 0603 (R1, R2 larger values for e-switch lights)
- R2: 4.7 / 100 kohm, 1%, 0603
- R3: 100 kohm, 5%, 0603
- R4: 47 ohm, 5%, 0603
- R5: 4.7 ohm, 5%, 0603