Launch Tower Computer III
Launch Tower Computer III is an open source PCB design by psas: a 4-layer, 205.5 × 152 mm board with 169 components (54 distinct parts). It is built around the PTN78020W, LTC2991, PTN78020H, CAT24C256 and more.
CAD files and software for the launch tower computer (LTC)
This subdirectory contains everything related to the third generation launch tower computer (LTC3), with the exception of the userspace software, which is contained in the [launch-tower-comm][1] repo.
[1]: https://github.com/psas/launch-tower-comm
For a quick introduction to the project, read the [Requirements doc][2] at ./doc/requirements/LTC3RequirementsSpec.adoc
Built around
Parts list
169 components, 54 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PTN78020W | PTN78020W | U201 |
| 1 | LTC2991 | MSOP-16 | U202 |
| 2 | PTN78020H | PTN78020W | U203, U204 |
| 1 | CAT24C256 | TSSOP-8_4.4x3mm_Pitch0.65mm | U301 |
| 1 | CD74HC14 | TSSOP-14_4.4x5mm_Pitch0.65mm | U401 |
| 1 | SN65220DBV | SOT-23-6 | U402 |
| 1 | SN74AHC1G08 | SC-70-5 | U403 |
| 9 | TLP3542 | DIP-6_W7.62mm | U404, U501, U502, U503, U504, U601, U602, U603 +1 |
| 2 | BSS138 | SOT-23 | Q202, Q203 |
| 13 | PMV45EN | SOT-23 | Q401, Q402, Q403, Q404, Q405, Q501, Q502, Q503 +5 |
| 1 | RJ45 | RJ45_8_SHIELDED | J401 |
| 2 | MicroFit header | Molex_Microfit3_Header_02x02_Straight_43045-0428 | P201, P401 |
| 1 | XH header | JST_XH_B02B-XH-A_02x2.50mm_Straight | P202 |
| 3 | Pin Head 1x2 | Pin_Header_Straight_1x02 | P204, P205, P206 |
| 1 | BeagleBone_Black_Expansion_Header_P8 | Pin_Header_Straight_2x23 | P301 |
| 1 | BeagleBone_Black_Expansion_Header_P9 | Pin_Header_Straight_2x23 | P302 |
| 3 | XH header | JST_XH_B04B-XH-A_04x2.50mm_Straight | P303, P304, P406 |
| 2 | MicroFit header | Molex_Microfit3_Header_02x01_Straight_43045-0228 | P402, P404 |
| 1 | MicroFit header | Molex_Microfit3_Header_02x05_Straight_43045-1028 | P408 |
| 3 | MicroFit header | Molex_Microfit3_Header_02x04_Straight_43045-0828 | P501, P502, P601 |
Show 34 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Pin Head 1x2 | Pin_Header_Straight_1x02 | JP301 |
| 4 | Pin Head 1x3 | Pin_Header_Straight_1x03 | JP601, JP602, JP603, JP604 |
| 2 | RELAY_1C | G5LE-14 | K401, K402 |
| 8 | MOMENTARY | SW_SPST_EVQQ2 | SW501, SW502, SW503, SW504, SW601, SW602, SW603, SW604 |
| 6 | CDSU4148 | SOD-523 | D201, D202, D203, D401, D402, D404 |
| 2 | RED | LED_1206 | D403, D405 |
| 1 | 3.3V | SOD-323 | D406 |
| 9 | 1μ | C_0805 | C201, C204, C211, C217, C404, C501, C502, C503 +1 |
| 1 | 2.2μ | C_1210 | C202 |
| 3 | 470μ | C_Radial_D16_L25_P7.5 | C203, C210, C216 |
| 5 | 0.1μ | C_0805 | C205, C301, C403, C405, C406 |
| 8 | 4.7μ | C_0805 | C206, C207, C208, C209, C212, C213, C214, C215 |
| 1 | 10μ | C_0805 | C401 |
| 1 | NP | C_1206 | C402 |
| 3 | 60m | R_2512 | R201, R203, R205 |
| 1 | 21k | R_0805 | R202 |
| 1 | 383k | R_0805 | R204 |
| 1 | 2.87k | R_0805 | R206 |
| 2 | 20k | R_0805 | R207, R208 |
| 20 | 10k | R_0805 | R209, R210, R213, R214, R402, R405, R409, R414 +12 |
| 2 | 36k | R_0805 | R211, R212 |
| 5 | 5.6k | R_0805 | R301, R302, R303, R304, R410 |
| 2 | 62k | R_0805 | R401, R411 |
| 2 | 100k | R_0805 | R403, R415 |
| 1 | 120 | R_0805 | R404 |
| 5 | 100 | R_0805 | R406, R609, R610, R611, R612 |
| 1 | 500k | R_0805 | R407 |
| 1 | NP | R_0805 | R408 |
| 2 | 240 | R_0805 | R412, R420 |
| 1 | 1.5k | R_0805 | R413 |
| 2 | 5.1k | R_0805 | R419, R422 |
| 3 | 0 | R_0805 | R423, R424, R425 |
| 8 | 270 | R_0805 | R501, R502, R507, R508, R601, R602, R605, R606 |
| 4 | 51k | R_0805 | R503, R504, R509, R510 |
