Editable Drawer Release Mechanism

Drag components to rearrange, click to edit connections

Revision: 1.3
Date:
Drawn by: Engineering Team

Interactive Schematic Diagram

POWER SUPPLY
CONTROL CIRCUIT
LOAD CIRCUIT
MECHANICAL SYSTEM
LiPo
3.7V LiPo Battery (1000-2000mAh)
3.7V
BAT1
TP4056
TP4056 Charging Module with battery protection
3.7V
U1
MT3608
Step-up DC/DC Converter (3.7V to 12V @ 2A)
12V
U2
AMS1117
3.3V LDO Regulator for ESP-01
3.3V
U3
ESP-01
ESP-01 WiFi Module with GPIO control
U4
AO3400
N-Channel MOSFET (30V, 5.7A) with flyback diode
Q1
220Ω current limiting resistor
R1
SOLENOID
12V Pull-Type Solenoid (500mA, 5N holding force)
L1
12V
1N4007
Flyback diode for solenoid protection
D1
Push-to-Open Spring Latch Mechanism
M1
3.7V
3.7V
12V
12V
3.3V
Status
Drawer Locked
Current: 0mA
SCHEMATIC LEGEND
Power (VCC)
Signal
Ground (GND)
Junction
Component Pin
Diode

Technical Specifications

Power Supply
  • Input: 5V USB or 3.7V LiPo
  • Battery: 1000-2000mAh
  • Charger: TP4056 with protection
  • 12V Boost: MT3608 (2A max)
  • 3.3V LDO: AMS1117 (800mA)
Control Circuit
  • MCU: ESP-01 (ESP8266)
  • WiFi: 802.11 b/g/n
  • GPIO: 2x usable
  • Switch: AO3400 MOSFET
  • Current: 220Ω resistor
Load Circuit
  • Solenoid: 12V, 500mA
  • Actuation: 250ms pulse
  • Protection: 1N4007 diode
  • Force: ~5N (500g)
  • Stroke: 5-10mm
Mechanical
  • Latch: Push-to-open type
  • Spring force: ~3N return
  • Drawer travel: 2-5cm
  • Mounting: Internal
  • Cycle life: 10,000+

Bill of Materials

Ref Component Value Qty Notes
BAT1 LiPo Battery 3.7V, 1000mAh 1 With JST connector
U1 Charging Module TP4056 1 With protection
U2 Boost Converter MT3608 1 3.7V to 12V
U3 Voltage Regulator AMS1117-3.3 1 3.3V LDO
U4 WiFi Module ESP-01 1 ESP8266 based
Q1 MOSFET AO3400 1 N-Channel
R1 Resistor 220Ω 1 1/4W
D1 Diode 1N4007 1 Flyback protection
L1 Solenoid 12V, 500mA 1 Pull-type
M1 Latch Mechanism - 1 Spring-loaded

Schematic Notes

Design Considerations

  • Power Isolation: Separate 12V and 3.3V power domains with proper regulation
  • Current Handling: MT3608 boost converter rated for 2A continuous (solenoid draws 500mA peak)
  • Flyback Protection: 1N4007 diode across solenoid to protect MOSFET from voltage spikes
  • Current Limiting: 220Ω resistor between ESP GPIO and MOSFET gate
  • Battery Protection: TP4056 includes overcharge/discharge protection

Interactive Features

  1. Drag and drop components to rearrange the schematic
  2. Click "Edit Mode" to enable component movement
  3. Click "Save Layout" to store your custom arrangement
  4. Edit section titles directly on the schematic
  5. Trigger the drawer mechanism to see animations
  6. Show current flow to visualize circuit operation

Connection Diagram

ESP-01 Connections:
GPIO0 → R1 → Q1 Gate
VCC → 3.3V Rail
GND → Ground Rail
MOSFET Connections:
Drain → Solenoid → 12V Rail
Source → Ground Rail

Made with DeepSite LogoDeepSite - 🧬 Remix