Shared Projects by Kingswood

Dual DRV8830 H Bridge

High speed optocoupler isolator for 3V serial port.

• 2 x Avago ACPL-M21L-SO5 optocoupler
• 4 x 470R
• 2 x 100nF

Easily runs at 1 Mbps, 2 mA LED current at 3.3V, 1 mA logic current from 3.3V

NRF24 Nitwork node LPC11U67, mini-B USB, LM92 or DS1621 temperature sensor, 3.3V regulator.

This board is designed to fit in a Hammond 1551R case, 50x50x20mm. The NRF24 only fits in the box if it is soldered down directly, but using the header and a socket works fine outside this box.

NRF24 nitwork node with ATTiny841, LM92 or DS1621 temperature sensor, 3.3V regulator. It uses ISPogo landing pads for in-system programming.

V3 has improved layout giving 50 uncommitted pads on a 0.1" grid for experimentation and expansion.

The board has space for a CR2032 battery on the bottom. Power consumption is under 1mA when the radio is off.

This board is designed to fit in a Hammond 1551P case, 40x40x20mm. The NRF24 only fits in the box if it is soldered down directly, but using the header and a socket works fine outside this box.

High speed optocoupler isolator for 3V serial port.

Optocoupler is Avago ACPL-M21L SO5, resistors 470R, capacitors 100n.