I was spoiled by other cheap battery-operated irons that had LEDs so I decided to add a pair of spare 5mm white LEDs to Pinecil iron. I had them from a reverse backup camera and they were already prewired with a thin wire.
- Vcc can be easily tapped from the leg of capacitor C8 or inductor L1. (Vcc measured 4V for my Pinecil.)
![[Image: AM-JKLWtPgE93CAW3PCvXLA_27svQV9shs0Jwq2M...authuser=0]](https://lh3.googleusercontent.com/pw/AM-JKLWtPgE93CAW3PCvXLA_27svQV9shs0Jwq2M3bi2RAgVrJWqxxledjhoKsPyKE8innIe-o_4z4bAvqUtK9FVq4shS04iAVJbDQG1kKWxYuBVD-WhMg6alcJg8yuWmn4dN_iR89MP9pPtNZjWZWhcAAggEQ=w2529-h1896-no?authuser=0)
- I added a 22 Ohm resistor to achieve about 22mA per LED: (Rs = (Vbus-Vf)/If = (4V-3V)/20mA = 40 Ohm. )
- I positioned the resistor right above the tip core and glued it to the ground tab while avoiding making short anywhere (use insulation)
![[Image: AM-JKLWtlo5VKgkrfVLnPJC9wc78rQ-PDC6Q1U5y...authuser=0]](https://lh3.googleusercontent.com/pw/AM-JKLWtlo5VKgkrfVLnPJC9wc78rQ-PDC6Q1U5yqKj-JAFn4K0NvdKUjisqKJfDdlJdipy-ialYgRazD6HJMy3YjTLjcmjwmQB0EH2pHh2S0QW2x_2sRGcAnnmIcrN2mM3y5FiWbPd4ttjfkyzSii54wDGsQQ=w1422-h1896-no?authuser=0)
- LED anode (+) is soldered to the resistor and cathode (-) to the ground tab.
- I drilled two small holes under the rubber sleeve for the cables and 3Dprinted a bracket to position the LEDs. Here is the file in Fusion360 (with Manufacturing Environment for slicing and final tolerance adjustments )
![[Image: ez2nZ9es_XcfHYM2qHmdrVSf5hFLDmA8Uym1Xdq8...authuser=0]](https://lh3.googleusercontent.com/ez2nZ9es_XcfHYM2qHmdrVSf5hFLDmA8Uym1Xdq8f5RooMV4YCi2XrZXcU37JT4-IOa2LAY3nCbrSMtCms8GI4_Ca53usZbm8O_2tIRHHK1y-2V3Ci3e_pyAFQd9-R50JxmyRMizAX1QLYbS5e5weilCsut7DG0LTKoTOB5ELSBm-gxm_s5aNVduBS4COFz9Ofqnil-hqtbxQJcIjwMhLr8VYHMbTr_dbeLqU3uxgIahoqLDEWqan-6oEoDSKMjJq8IS_ILngtM2EDEfAPWLKYoENB9CeWbfnbmQUG5MReGs46XHhKYxpz9jrwDWcb4bs4J0bLqXja-ydtF2AVmIHJNNT7EfDKR_cYtsxVxH_MzeO9PxurW_Pni2ESgFDzjci7yAILkRsNHxuhHtbGVD-xEOEyIfl2nAl1qHfNVwIS6l5e7J2PcEUMZLYG0kUoOxX3odeT2dJ7WbeQ7Mu_mWZVcwjhE2QEqMnZthrRXxandUahABDw_B7hZ6rw8KwWKSewhdqwpyVH4q-Ua-23tSMC1PyOeTV8KZqSSCF2UjlBoU3nENFU2JYT-mrdcmOAwRPHZBDH3aPMgdDyEHLZZV7Qpir5giXGGYSmxzEItIXEBKUrBJ2jJfG2c3fkdw6OT_7C8ZYJ_MOERWKti9LFgN9xpxWfCcLTT52r_pqhP-Fb-8U_rLXP1k8CqSsLNLZj0VRu5BZVeAdjtT5nVljdSBnzX0tM3UfCIZu3pnnrNoQrQ-tzItQ7WqGnuPnIcpzaE=w1422-h1896-no?authuser=0)
- Final result:
- Vcc can be easily tapped from the leg of capacitor C8 or inductor L1. (Vcc measured 4V for my Pinecil.)
- I added a 22 Ohm resistor to achieve about 22mA per LED: (Rs = (Vbus-Vf)/If = (4V-3V)/20mA = 40 Ohm. )
- I positioned the resistor right above the tip core and glued it to the ground tab while avoiding making short anywhere (use insulation)
- LED anode (+) is soldered to the resistor and cathode (-) to the ground tab.
- I drilled two small holes under the rubber sleeve for the cables and 3Dprinted a bracket to position the LEDs. Here is the file in Fusion360 (with Manufacturing Environment for slicing and final tolerance adjustments )
- Final result: