Tm1638-test
About the Tm1638-test PCB
Tm1638-test is an open source PCB design by FrankBuss, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 80 components from 9 distinct parts.
Other key parts include the TM1638 and CA56-12EWA. By type, the board carries 40 diodes, 24 switches, 10 resistors, 3 ICs, 2 capacitors and 1 connector.
It belongs with the audio designs in this gallery.
From the project
A MIDI sequencer
For programming you can use an USBasp. The red wire of the USBasp programmer needs to be connected to the pin 1 location:
For debugging, there is the jumper J5 near the MIDI connector, to connect a 5V UART receiver. Connect the top pin to GND (black wire in the image) and the bottom pin to the UART RX input (grey wire) :
The Arduino IDE doesn't flash the ATmega fuses, so initially you need to do this from the command line with avrdude like this:
Main components on the Tm1638-test
Tm1638-test bill of materials (BOM)
80 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TM1638 | SOIC-28W_7.5x17.9mm_P1.27mm | U1 |
| 2 | CA56-12EWA | CA56-12EWA | U2, U3 |
| 1 | Conn_01x05_Male | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 24 | SW_Push | B3F-through-hole | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +16 |
| 16 | LED | LED_D3.0mm | D1, D2, D3, D4, D5, D6, D7, D8 +8 |
| 24 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D9, D10, D11, D12, D21, D22, D23, D24 +16 |
| 1 | 100nF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C1 |
| 1 | 10uF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C2 |
| 10 | 51 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R10, R19, R20, R21, R22, R23, R24 +2 |
Tm1638-test design files
The KiCad project lives in the FrankBuss/beat707 repository on GitHub; these links point at the commit this page was built from.
Tm1638-test: common questions
How big is the Tm1638-test PCB?
The Tm1638-test measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Tm1638-test?
80 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the Tm1638-test design files?
From the FrankBuss/beat707 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Tm1638-test design in my own project?
The repository has no license, so all rights stay with FrankBuss. Use it as a reference, and ask the author before reusing the design.
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