These are 7-segment displays with functional decimals after every digit, entirely controllable using just two GPIO pins. They use a TM1637 LED driver and take 5 V. The height of the digits is 0.36” or 9.1 mm.

To use with an Arduino-compatible microcontroller, install one of the TM1637 libraries (which can be installed from the Arduino IDE Library Manager).

For 4-digit: the PCB dimensions are 23 mm x 45 mm and mounting hole diameter is 3 mm.

For 6-digit: the PCB dimensions are 23 mm x 76 mm and mounting hole diameter is 3 mm.

Inclusion of knurled hex socket head M3 machine screws is optional.

Delivery

Orders will be dispatched within one business day, using recycled packaging wherever viable.

By default, all orders are dispatched by Royal Mail Second Class/RM48. If your order is needed urgently, you are encouraged to select an upgraded postage option, such as First Class/RM24 or Royal Mail Special Delivery, during checkout.

Some areas of the UK have experienced a degraded level of service from the Royal Mail with deliveries as infrequently as once per week or worse. If you are currently affected by this, please contact me before ordering to discuss the possibility of using an alternative courier service.