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V3.1 Release

A project log for TritiLED

Multi-year always-on LED replacements for gaseous tritium light sources

Ted YapoTed Yapo 02/02/2018 at 14:353 Comments

There's not much difference between V3.0 and V3.1 (just an added switch), but I figured I'd give the latest (and final?) version its own page.  Here's where all the parts go.  Note that it shows an OSLON LED version with a 51k resistor, if you build the Cree XPE2 version, use a 59k resistor (see below).

Cree XPE2 Green BOM

The PCBs can be ordered from OSH park.  Cost is $4.10 for three copies.

Here's a link to a DigiKey cart with all the parts for a single copy using a Cree XPE2 LED.  Cost is $6.40, excluding the case, which you have to buy elsewhere.  The BOM in table form:

Index Quantity Part Number Description Customer Reference Available Quantity Backorder Quantity Unit Price USD Extended Price USD
1 1 PIC12LF1571-I/SN-ND IC MCU 8BIT 1.75KB FLASH 8SOIC IC1 1 0 0.58 0.58
2 1 296-18758-1-ND IC SNGL MONO MULTIVIBTOR SM8 IC2 1 0 0.7 0.7
3 1 1276-1804-1-ND CAP CER 10UF 25V X7R 1206 C3 1 0 0.26 0.26
4 1 1276-6469-1-ND CAP CER 1UF 25V X7R 0805 C2 1 0 0.1 0.1
5 1 311-100FRCT-ND RES SMD 100 OHM 1% 1/4W 1206 R2 1 0 0.1 0.1
6 1 IRLML6244TRPBFCT-ND MOSFET N-CH 20V 6.3A SOT-23 Q1 1 0 0.54 0.54
7 1 DMG2305UX-13DICT-ND MOSFET P-CH 20V 4.2A SOT23 Q2 1 0 0.44 0.44
8 1 BAT-HLD-001-THM-ND RETAINER BATT CR2025/2032 PC PIN B1 1 0 0.28 0.28
9 1 P189-ND BATTERY LITHIUM 3V COIN 20MM Battery 1 0 0.29 0.29
10 1 XPEBGR-L1-0000-00F02CT-ND LED XLAMP XPE2 GREEN 525NM 2SMD U$1 1 0 1.86 1.86
11 1 311-3599-1-ND CAP CER 100PF 50V NPO 0603 C5 1 0 0.11 0.11
12 1 311-59.0KHRCT-ND RES SMD 59K OHM 1% 1/10W 0603 R3 1 0 0.1 0.1
13 1 CKN10778CT-ND SWITCH TACTILE SPST-NO 0.02A 15V U$2 1 0 0.25 0.25
14 1 SRR6028-102YCT-ND FIXED IND 1MH 150MA 4.5 OHM SMD L1 1 0 0.790.79

OSLON Signal Verde BOM

The PCB can be ordered from OSH Park.  Cost is $4.10 for three copies.

Here's a link to a DigiKey cart with all the parts for a single copy.  Cost is $8.03 (excluding case and PCB).

Index Quantity Part Number Description Customer Reference Available Quantity Backorder Quantity Unit Price USD Extended Price USD
1 1 PIC12LF1571-I/SN-ND IC MCU 8BIT 1.75KB FLASH 8SOIC IC1 1 0 0.58 0.58
2 1 296-18758-1-ND IC SNGL MONO MULTIVIBTOR SM8 IC2 1 0 0.7 0.7
3 1 1276-1804-1-ND CAP CER 10UF 25V X7R 1206 C3 1 0 0.26 0.26
4 1 1276-6469-1-ND CAP CER 1UF 25V X7R 0805 C2 1 0 0.1 0.1
5 1 311-100FRCT-ND RES SMD 100 OHM 1% 1/4W 1206 R2 1 0 0.1 0.1
6 1 IRLML6244TRPBFCT-ND MOSFET N-CH 20V 6.3A SOT-23 Q1 1 0 0.54 0.54
7 1 DMG2305UX-13DICT-ND MOSFET P-CH 20V 4.2A SOT23 Q2 1 0 0.44 0.44
8 1 BAT-HLD-001-THM-ND RETAINER BATT CR2025/2032 PC PIN B1 1 0 0.28 0.28
9 1 P189-ND BATTERY LITHIUM 3V COIN 20MM Battery 1 0 0.29 0.29
10 1 311-3599-1-ND CAP CER 100PF 50V NPO 0603 C5 1 0 0.11 0.11
11 1 CKN10778CT-ND SWITCH TACTILE SPST-NO 0.02A 15V U$2 1 0 0.25 0.25
12 1 SRR6028-102YCT-ND FIXED IND 1MH 150MA 4.5 OHM SMD L1 1 0 0.79 0.79
13 1 475-3450-1-ND LED OSLON SIGNAL GRN 505NM 2SMD
1 0 3.49 3.49
14 1 311-51.0KHRCT-ND RES SMD 51K OHM 1% 1/10W 0603
1 0 0.1 0.1

Design Files

The Eagle design files and a library of all the components used are in the GitHub repo.

Discussions

Robert wrote 03/25/2019 at 09:25 point

I would like to build v3.1 but I am still wondering how do you program/calibrate the MCU with no programming pins on the PCB (like on v2.x)?

  Are you sure? yes | no

Ted Yapo wrote 03/25/2019 at 11:37 point

  Are you sure? yes | no

Robert wrote 03/25/2019 at 12:07 point

thanks a lot I almost forgot these things exist :))

  Are you sure? yes | no