Therefore, I designed a circuit that provides approximately 180 degrees of travel range. This circuit allows you to increase or decrease the travel range as needed.
With this circuit, you can control both your servos and ESCs.
These types of handmade circuits typically use the IC-555 Timer. However, this isn’t sufficient for stable operation. Therefore, I opted for the IC-556 Dual Timer. This increases timing stability and ease of adjustment, resulting in smoother and more stable servo movements.
I designed two circuits. They are both essentially the same. The standard one requires a single battery to power both the circuit and the servo.
The power input includes a regulator IC. You can use a 7805 for a constant 5V or a 7806 for 6V. This circuit can power servos requiring a maximum current of 1 amp. This is sufficient for micro and mini servos. It will also be sufficient for standard case servos that don’t have high torque. This circuit can also be used for ESC testing or control. It’s a suitable circuit for general-purpose use.
However, large, high-torque servos may require high current or high voltage to operate. Therefore, the second circuit has an extra power input. It operates with an external battery that matches the voltage supported by the servo.
As always, I chose JLCPCB for the printed circuit boards of the circuits I design.
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Required Materials For Circuits:
556 Dual Timer IC: https://s.click.aliexpress.com/e/_c3eCmUfl
7805 or 7806 Regulaor IC: https://s.click.aliexpress.com/e/_c3xkdQYn OR https://s.click.aliexpress.com/e/_c3TKF1G7
5mm Led: https://s.click.aliexpress.com/e/_c4bbUFeP
150R, 150K, 1.5K * 2, 220R * 2 resistors: https://s.click.aliexpress.com/e/_c3wF2lM3
2A Diode (SB260): https://s.click.aliexpress.com/e/_c4NSRqjH
100nF, 10nF * 2, 220nF (224)* 2: https://s.click.aliexpress.com/e/_c3yzfZar
35V 100uF, 35V 10uF capacitors: https://s.click.aliexpress.com/e/_c4lfiuyB
Male header pin: https://s.click.aliexpress.com/e/_c4Mgy7tH
4.7K (Or 5K), 47K (or 50K) horizontal trimpots: https://s.click.aliexpress.com/e/_c2xAOvxp
50K trimpot: https://s.click.aliexpress.com/e/_c3CQ3odh
10K Potantiometer: https://s.click.aliexpress.com/e/_c3oPzm0f
GERBER FILES:
Standart Servo & ESC Control Circuit (Tester-Driver): https://drive.google.com/file/d/1nfqTg9a-QzydOI9-Pb66fQwaawkvCY5g/view?usp=sharing
Version with external power input: https://drive.google.com/file/d/1XF2Vqe5Q7PZh7XPwCLQ-YaA64PoKquSS/view?usp=sharing
