OSH Park
Profile for DEL
Shared projects
BLF 17 mm contact board [untested]
by
DEL.
2
layer board of
0.69x0.69
inches
(17.42x17.42
mm).
Shared on
February 28th, 2017 01:20.
Mitko’s direct-drive contact board. Spring goes on one side, LED wires on the other. Spring-pad diameter = 0.45 inch.
BLF 20 mm contact board [untested]
by
DEL.
2
layer board of
0.80x0.80
inches
(20.22x20.22
mm).
Shared on
February 28th, 2017 01:20.
Mitko’s direct-drive contact board. Spring goes on one side, LED wires on the other. Spring-pad diameter = 0.52 inch.
BLF driver DDm-L4 [rev00][untested]
by
DEL.
2
layer board of
0.94x0.94
inches
(23.77x23.85
mm).
Shared on
February 8th, 2017 12:24.
DD+1 alternative for the LD-34 driver, as used in the Convoy L4 and other lights.
I did not have a driver or light on hand to verify dimensions, so please check carefully before ordering.
- Switch is Digikey part no. 679-2400-ND.
BLF driver DDm-22 [rev00][untested]
by
DEL.
2
layer board of
0.88x0.88
inches
(22.33x22.33
mm).
Shared on
February 5th, 2017 16:42.
BLF flashlight driver, 22 mm, DD+m
Features
- 22 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
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