Mppt solar charge controller #6 – 80w panel, 12v battery autoranging bargraph
Time to connect a solar panel to a 12v battery and take a look at voltage, current and power. I'm…
Turning on h4 car headlight bulb with irf3205 mosfet
This high power MOSFET has an on-resistance of just 8mΩ, but only if the gate is raised to a sufficiently…
Inductor tutorial – how to boost voltage and switch polarity
You can't light a blue LED with a 1.2 volt rechargeable battery - or can you? In this circuit, not…
Mppt solar charge controller #5 – plotting the iv curve
Built a basic pixel plotting mode which displays the solar panel's IV curve. The curve has a distinct turning point…
Mppt solar charge controller #4 – finding maximum power with the lamb
Finally built my variable DC load which I've named the LAMB (Large Array of Miniature Bulbs). Precious little sun here…
Mppt solar charge controller #3 – new display, watts peak and bargraph
Another week, another LCD. The alphanumeric display just didn't have enough screen real estate, and bargraphs would have been difficult…
Using the acs712 hall effect current sensor module part 2
Using Arduino to read the ACS712 current sensor and the required mathematics to get an output in Amps. Warning: contains…
Schottky diode experiments – zero forward voltage?
Imagine the perfect diode. It would have a zero forward voltage. Well, in a tightly controlled environment (complete with dodgy…
Solar power system with 20w panel, pwm5 controller and sla gel battery
Small solar power setup with a 20W polycrystalline panel, PWM5 solar charge controller and 7Ah SLA gel battery. PWM5 controller…
Mppt solar charge controller #2 – volts, amps, watts now displayed
Both the voltage and current sensors are now fitted and the code written. The display now shows volts, amps and…