4 channel relay board. Use relay 11.001. Use screw terminals for all connections. Have an LED indicator for each signal. Have 5V supply for relay coils. Circuit can be as bare-bones as possible (IE no protection (fuses), and no filtering). HOWEVER please include diodes to protect the MOSFETS.
We need a trigger, gas, and wire feed circuit for https://www.youtube.com/watch?v=z35BYaCRRhM
The gun tip appears to be live, so no contactor is used inside the gun. This makes it a very simple but robust design.
A device that mixes two or more analog audio signals into one analog signal, Does so via multiple inputs with dimmer switches for individual volume control. It should be Audiophile/Studio Quality Sound (I.E Low Noise). Can be either banalced or unbalanced.
Is a part of this OSE construction set:
http://opensourceecology.org/wiki/Open_Source_Audio_Capture_%2B_Editing_%2B_Reproduction_Construction_Set
On this page:
http://opensourceecology.org/wiki/Open_Source_Desktop_Audio_Mixer
Smart charger that goes from 240 AC to 24V DC lead acid batteries. The equivalent commercial counterpart is https://www.ebay.com/itm/24V-5A-Jazzy-Power-Chair-XLR-Mobility-Smart-Charger/331199313251.
This is currently used as a backup charger for the Seed Eco-Home as we test the overall PV system.
- Should resemble what is called a "Fully Modular Power Supply" Meaning no cords are permanently attached
- AC or DC Power In
- Around 500W level
Here is the OSE Page:
http://opensourceecology.org/wiki/Open_Source_PC_Power_Supply_Unit
A simple Arduino clone with terminal block breakouts. Center it around the ATMEGA328-PU (UPL 9.002). Include a 5V power supply, and one indicator LED (with disconnecting jumper). Add reset button and ICSP headers. Use internal resonator. FTDI not necessary - but future version it might be handy
An AC to DC converter taking 120V, and turning into switched DC. The design can be based around the MC34063ABN (UPL 5.009). Design for maximum current output.