2 layers108 × 85.3 mm
Lamps Type5
bgerp/ztm_doc
This repository is made to hold all the schematics and sheets around the Zontromat project and BCVT. This includes: - Electrical schematics and sheets. - Electronic schematics and sheets.
77 parts
2 layers89.5 × 27.3 mm
E Latch
bgerp/ztm_docThis repository is made to hold all the schematics and sheets around the Zontromat project and BCVT. This includes: - Electrical schematics and sheets. - Electronic schematics and sheets.
- Size
- 89.5 × 27.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 21
- Pads
- 76
- Tracks, vias
- 0, 0
- Pours
- 2
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20171130)
- Created
- 29 Oct 2020
- Updated
- 28 Jul 2025
Overview
E Latch is an open-source printed circuit board by bgerp, from the bgerp/ztm_doc repository on GitHub. It is a 2-layer board of 89.5 × 27.3 mm with 23 parts on 21 nets.
It is built around the DRV8837DSG, L293D and LM358. Its parts include 11 capacitors, 5 resistors, 4 ICs and 2 connectors.
Main components
3
DRV8837DSG
WSON-8-EP(2x2)-40℃~+85℃ 1.8V~7V 1.9A 120nA 280mΩ Yes WSON-8-EP(2x2) Brushed DC Motor Drivers ROHSTexas InstrumentsBrushed DC Motor Drivers
L293D
DIP-16-40℃~+150℃ 1.2A 2 4.5V~36V 4mA 600mA DIP-16 Brushed DC Motor Drivers ROHSSTMicroelectronicsStepper Motor Driver
LM358
SOP-8-18V~18V 0℃~+70℃ 1.2MHz 10nA 2 24mA 3V~36V 500uA 50nA 5mV 80dB Built-in compensation SOP-8 Operational Amplifier ROHSMSKSEMIOperational Amplifier
README
README.mdZontromat - Zonal Electronic Automation
Introduction
This repository is made to hold all the schematics and sheets around the Zontromat project and BCVT. This includes:
- Electrical schematics and sheets.
- Electronic schematics and sheets.
- Thermal and hydro schematics and sheets.
- Flows, diagrams, and charts of the process control.
This repository is not licensed by single license. Every single project in it is licensed separately, as separate material.
Limitations
- Every project described in this repository have its own license and terms of use, reproduce, distribution and redistribution.
Contribution
- Contribution is permitted by the owner of the project by request from the contributor.
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100nF | Capacitor_SMD:C_0805_2012Metric | C2, C3, C4, C5, C6, C7, C9, C10, C11 |
| 3 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R4, R5 |
| 2 | 100uF | Capacitor_SMD:CP_Elec_8x11.9 | C1, C8 |
| 2 | 47k | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 1 | DRV8837 | Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm | U4 |
| 1 | L293D | Package_DIP:DIP-16_W7.62mm | U3 |
| 1 | LM358 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | LM7805_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | Motor_DC | Connector_Phoenix_MSTB:PhoenixContact_MSTBA_2,5_2-G-5,08_1x02_P5.08mm_Horizontal | M1 |
| 1 | POWER | Connector_Phoenix_MSTB:PhoenixContact_MSTBA_2,5_2-G-5,08_1x02_P5.08mm_Horizontal | J1 |
| 1 | SIGNAL | Connector_Phoenix_MSTB:PhoenixContact_MSTBA_2,5_2-G-5,08_1x02_P5.08mm_Horizontal | J2 |
Questions
How big is the E Latch PCB?
It measures 89.5 × 27.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the E Latch use?
23 parts, built around the DRV8837DSG, L293D and LM358. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the E Latch KiCad files?
From the bgerp/ztm_doc repository on GitHub, at the commit this page was made from: the board is PCBs/E-Latch/E-Latch_Type1/E-Latch.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the E Latch design in my own project?
Its repository states no licence, so its author keeps all rights: ask bgerp before reusing the design.
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