I normally frequent /r/vaporents and /r/dynavap. But I felt the need to share this with my fellow stoner-engineers that lurk on FC.
Model DIH-005. The "Russian doll" Portable Dynavap Induction Heater.
Images and design notes: Imgur album
Purpose: The purpose of this project is to create a design for a Dynavap Induction Heater that fit inside of a plastic 16oz coffee cup. Additionally, this design allows this Dynavap Induction Heater to be replicated using off-the-shelf parts and commonly available tools.
Design: The design was intended to improve upon DIH-004 (link), which required the use of a custom chassis to align the internal parts correctly. DIH-005 incorporates a "sleeve" design (like a Russian doll) to align internal parts and provide a mounting platform for the induction heater power supply unit.
Features:
- Can be built using off-the-shelf parts and commonly available tools.
- Portable (battery operated)
- Stealthy (plastic 16oz coffee cup)
- Can be used one-handed
- 3-way toggle switch to run via internal rechargeable batteries; via 12V DC input; or off.
- 11.1v internal rechargeable battery, constructed from standard 3.7v 18650 lithium cells. Integrated battery management system (BMS) with balanced charging
- Blue status LED to indicate when running on battery power; green LED on lid lights up when induction heater is active.
- Sweet-looking momentary push button on cap.
- (optional) Additional Arduino momentary push button on cap (index finger operation)
- Move DC 12V input jack and main power switch to cap. Easier build process, easier dis/re-assembly of unit)
- A little bit of glass tube to pop out on the top, just because I think it looks cool.
Parts List
- (O) = Optional; (R) = Required
- (R) Container: Plastic 16oz coffee cup ($8)
- (R) Heating: Induction Heater power supply & coil ($13)
- (R) Glass Stem: Cloupor Cloutank M3 Pyrex Glass($4)
- (R) Power Delivery: MOSFET trigger module 400W / 15A ($7) <-- you can find this for $1 on eBay; but delivery takes 1 month.
- (R) Battery Cells: Samsung 25R 20A 2500mAh 18650 batteries 3-pack ($19)
- (R) Battery Management System (BMS): HX-3S-FL25A ($10). This is a 3S (3-series) battery management system with balanced charging. You MUST buy a BMS with balanced charging if you intend for the battery pack to be rechargeable inside the induction heater unit.
- (R) Plastic Food Container: Look for 4oz round plastic food containers, with the correct dimensions (see diagrams). You want a container that can fit inside the 16oz plastic coffee cup. Try something like this. You can usually find a similar item in the food container section of a local Walmart, Target, or grocery store. Be prepared to use a saw and dremel to shave it down to the correct size.
- (R) DC Input jack: DC Input jack 5.5mm x 2.1mm, 15 pack ($9)
- (R) Switch (operating on/off): Momentary push button switch ($9) <-- Look for any switch that is single-pole single-throw momentary switch. Voltage and current rating doesn't really matter. If you choose to get a switch with an LED indicator on it, you can forego the green LED on the cap.
- (R) Power Supply Unit: Kastar 12V 6A 72W Power Supply ($10)
- (R) Switch (main power, both DC and batteries): Model 500SSP3S1M1REB. SPDT On/Off/On slide switch. ($4)
- (O) LEDs: A bunch of multi-colored LEDs ($10).
- (O) Index-finger switch: Arduino 6x6x6 tactile push button switch ($6)
- Electrical wire
- Electrical tape
- 2-pin and 4-pin electrical connector plugs
- Heat shrink tube
- Hot glue
- Sandpaper
- Tools used: Screwdriver | wire stripper | needle-nose pliers | jigsaw (hacksaw if you don't have one) | dremel/rotary tool | soldering iron | drill | drill bits and spade bits
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