Archive for October, 2013

Nikon D70 Remote Control PCB Layout

Sunday, October 13th, 2013

Today, the Nikon D70 Remote control has passed another milestone in it’s evolution. The schematic has been polished and revision A of the PCB designed ready to send to manufacture.

Schematic Changes

The main changes to the schematic are as follows:

  • Addition of connection points for power (Bench power supply, Coin Cell, 2xAA battery)
  • Power LED to indicate if the board is powered or not
  • Added a new part for the SOT353 single AND gate component
  • Grounded unused pins

And here is the final version of the revision A schematic:

Nikon D70 Remote Schematic (Rev A)

Nikon D70 Remote Schematic (Rev A)

The main reason for this taking a while to complete is that I have had to create new components for the single AND gate. I have also take the time to tidy up my parts library in Designspark, something which is overdue.

PCB Layout

The number of components is small and so I will be using the iTead Studio 5cm x 5cm PCB production service. At the time of writing this is coming in at $9.99 for 10 boards. And here is the board:

Nikon D70 Remote Board Layout

Nikon D70 Remote Board Layout

And in 3D:

Nikon D70 Remote 3D Impression

Nikon D70 Remote 3D Impression

Bill of Materials

For this board I am intending to use two suppliers:

Bitsbox are a fantastic small business and are fantastic value for discrete parts but I have elected to use some surface mount components and for these I will have to use RS Components. The bill of materials (excluding the board) is:

Part Value Size Quantity Supplier Part Number Unit Price Board Price
STM8S TSSOP20 1 RS Components 724-9895 £0.91 £0.91
C1 1uF 1206 1 RS Components 264-4179 £0.05 £0.05
C2 100nF 1206 1 RS Components 766-1126 £0.01 £0.01
Header 4 x 1 1 Bitsbox CN202 £0.06 £0.06
Header 6 x 1 – Male 1 Bitsbox CN203 £0.21 £0.21
Header 6 x 1 – Female 1 Bitsbox CN259 £0.25 £0.25
R1 10K 1206 1 RS Components 223-2394 £0.02 £0.02
R2 1K 0805 1 RS Components 223-0427 £0.01 £0.01
R3 2K2 0805 1 RS Components 721-8508 £0.08 £0.08
R4 100 0402 1 RS Components 667-8602 £0.01 £0.01
LED 1 RS Components 654-5767 £0.05 £0.05
2N7002 SOT23 1 RS Components 780-0478 £0.02 £0.02
Single AND Gate SOT353 1 RS Components 751-2806 £0.04 £0.04
Power Switch 1 Bitsbox SW109 £0.88 £0.88
Reset Switch 1 Bitsbox SW08 £0.38 £0.38
IR LED 1 Bitsbox TOP022 £0.20 £0.20
Total £3.18


Now we sit back and wait for two weeks whilst the boards are manufactured.