Arnas MasRodjie

PCB Laser and CNC Milling

Arnas MasRodjie — Tue, 01 Feb 2022 00:55:00 +0000

In the previous post, i was made PCB using CNC milling, the result is satisfying, but the problem is the bit is often replaced. So i upgrade my CNC to add laser cutting. The laser use for mark the pcb for etching later, and CNC use for drilling and cutting. The result is so satisfying.

ESP32 IOT Control

Arnas MasRodjie — Wed, 05 Jan 2022 01:10:00 +0000

IOT Control let you turn on/off devices wirelessly. Using ESP32 for MCU

Mengganti Analog Gamepad

Arnas MasRodjie — Wed, 11 Aug 2021 03:12:00 +0000

Analog gamepad ketika sering dipakai lama-kelamaan rusak. Untuk itu harus diganti. Cara menggantinya pun cukup mudah.

Buka semua baut penutup gamepad. Lepas tutup gamepad
Dengan menggunakan solder attractor, buang semua timah yang menempel di kaki analog. Pastikan bersih dari timah yang menempel.

3. Pasang part pengganti analog nya.

4. Solder kembali. Ketika menyolder, tekan komponen analognya agar benar-benar menempel ke PCB nya. Ini penting agar analog rata dengan yang satunya dan tidak menimbulkan masalah knob analog bergesekan dengan body karena komponen analognya terangkat.

5. Pasang kembali semua part kebalikan dari memasangnya

Selamat mencoba!

PWM Controlled

Arnas MasRodjie — Tue, 10 Aug 2021 01:51:00 +0000

Take control the PWM duty cycle using arduino

External DAC vs Internal DAC

Arnas MasRodjie — Sat, 07 Aug 2021 05:58:00 +0000

This is my experiment with DAC. First i am using external DAC. I am using PCF8591 I2C using STM32F103 and arduino framework. The result is terrible. It just got 10Hz with 100 resolutions. Unfortunately, i don’t have SPI DAC so i can’t test how fast it. Then i am trying to use internal DAC built in: STM32F103RET6 with stm32cube and same 100 resolutions. It’s reach 6KHz. Not bad.

Next time i’ll try to use DMA. It’s should be faster.

L293D VS A4988 Stepper Motor Driver Comparison

Arnas MasRodjie — Mon, 02 Aug 2021 04:00:00 +0000

The L293D motor driver can be use for stepper motor driver, but i wouldn’t recommend. First, it’s only draw maximum 600mA. Second, it doesn’t have current limiter. Here is L293D using AccelStepper library:

Here’s using A4988 using same AccelStepper library. The acceleration and deceleration was pretty smooth. Also it’s has holding feature.

DIY BlackMagic Probe

Arnas MasRodjie — Tue, 13 Jul 2021 05:16:00 +0000

I love to trying and experiment new technology. Even i’ve stlink and jlink debugger, i like to try blackmagic probe. There are blackmagic probe on some store but it’s expensive. Fortunately using bluepill STM32F103 we can us it for BlackMagic probe. Simply follow this instruction for convert the bluepill to blackmagic probe:

https://github.com/koendv/blackmagic-bluepill

For easy to use, i make PCB and 3D print base. The result is:

The benefit for using BMP is it’s has UART feature. So you can attach UART target to BMP. It’s save USB port. Of course you can use USB UART even you don’t use the debugger. It’s 2 in 1. On your device manager (or dev on *nix), it show 2 port (BMP port and UART port).

DIY Wireless Printer

Arnas MasRodjie — Mon, 28 Jun 2021 04:26:00 +0000

I’ve old LaserJet Printer: HP M1132 MFP. It’s B&W and has scanner on it. I’m happy to use it since it easy to use, cheap cartridge and less maintenance. But since i’m my MacOS to Mojave, the driver stopped working. I still want to use this printer since it still in good condition. So i upgrade it to wireless printer. Using raspberry pi 3, i install it with raspbian and CUPS. The installation was pretty straight easy. And i make enclosure using Fusion360 and print it using PETG filament. Ideally using black colour to make match with the colour printer body.

Then i make printer mount to make it simpler.

Finally i can print using any OS (Windows, MacOS, Android and iOS) without any driver installation. It’s done automatically by print server. Enjoy life easier.

Climate Control System

Arnas MasRodjie — Thu, 20 May 2021 12:18:00 +0000

Climate Control System for controlling room/cage. With temperature and humidity sensor and has 7 output for controlling fan, heater, cooling and alarm. With simple menu and easy to use.

PCB CNC Milling

Arnas MasRodjie — Wed, 05 May 2021 05:53:00 +0000

Using CNC Milling to create PCB is easy and fast to make PCB prototyping. I wouldn’t recommended to use it for mass production. After make some trial and error testing, finally i found the good result. I’m using endmill than V-Bit.