What’s in my bag? – pilot
Essential items for your everyday handbag carry. Pilot episode of new video format.
Julian’s postbag: #47 – nrf51822 bluetooth 4.0 ble dev kit
A Bluetooth Low Energy development kit. BLE400 Mother Board for nRF51822 BLE4.0 Bluetooth 2.4G Wireless Module Expansion http://www.ebay.com/itm/-/400967553827 Low Power…
Julian’s idea: balance charging using inductive transfer
Proposal for a balance charging scheme using inductive transfer from one cell to the adjacent one.
Julian’s postbag: #46 – sunfounder quadruped robot kit
Unboxing and some assembly of Sunfounder's walking robot kit. A couple of Arduino Nanos in here, plus nRF24L01+ modules, 12…
Julian’s postbag: #45 – pal tv camera 170 lens fpv 5v! banggood
A 5V (NOT 12V) wide angle lens camera for FPV (first person view) for use on quadcopters and other flying…
Julian’s project: electric bike upgrade to lifepo4 – #6 storage charge
The Turnigy balance charger misbehaved and let one of the LiFePO4 cells go way over voltage. So I'm trying a…
Arduino mppt solar charge controller: #22 – inductor change
Finally got round to changing the inductor. The new one has a much larger ferrite ring and thicker enamelled copper…
Julian tests: 250w led driver with 2x 100w leds
Testing a low cost DC/DC boost converter with constant voltage and constant current potentiometers, suitable for driving high power LEDs.…
Julian reveals: secrets of the pwm5 – #3 profitability
How profitable was this product? Am I now retired and living on a yacht in the mediterranean?
Julian reviews: thrunite tc10 rechargeable led torch
The ThruNite TC10 is a 900 lumen 18650 lithium ion powered torch with in-torch recharging via USB. In this review,…