Custom engineering

Electronics, firmware,
and control.

This page is work we do for other organisations. The home page is our own product R&D, and it stays separate. Here, a project means custom electronics, firmware, control systems, and integrated engineering: power electronics, embedded systems, robotics, industrial automation, and sensors and instrumentation.

सहअस्तित्वCoexistence
Robotics
Automation
Power
electronics
Embedded
Sahastitwa सहअस्तित्व Coexistence

The name

Coexistence, on an engineering job.

Sahastitwa, सहअस्तित्व, means coexistence. On this work it means the electronics, the firmware, and the control are designed as one system, not handed between strangers.

The same idea sits behind the company: technology that lets people, industry, and nature share the ground they are on.

Disciplines

Five areas. One engineered system.

A project can stay in one of these, or it can need several. Sensors and instrumentation belong here too, when the system has to measure something before it can control it.

01ElectronicsCustom circuits · Power
02FirmwareOn the device
03ControlSensing to action
04IntegrationOne system
01

Power electronics

Power that has to be converted and protected.

Custom power electronics for an energy system or an industrial machine. We start from the electrical job, not from a catalogue part.

  • Conversion
  • Control
  • Protection
02

Embedded systems

Firmware that has to live on the hardware.

Device logic and the control around it, written for the board it will actually run on.

  • Firmware
  • Device logic
  • Field behaviour
03

Robotics

A machine for one task.

Motion, sensing, and control, engineered together for the place the machine will work.

  • Motion
  • Sensing
  • Control
04

Industrial automation

A process that has to repeat.

Control and integration for a plant workflow, built around how that line actually runs.

  • Process control
  • Integration
  • Repeatability
05

Sensors and instrumentation

Measure it before you control it.

Sensing and instrumentation as part of the electronics and the control system, not as a box added at the end.

  • Sensors
  • Instrumentation
  • Signal into control

How a job starts

The job first. A prototype after that.

We need the problem and the limits before we design electronics or write firmware.

  1. 01

    Understand

    The site, the machine, and what cannot change.

  2. 02

    Agree a direction

    Electronics, firmware, and control, talked through with your team.

  3. 03

    Prototype

    A first build that answers the open question.

  4. 04

    Revise

    Change it from what the tests show.

Before you write

A few practical questions.

What does a custom project include?

Custom electronics, firmware, control systems, and the integration of those. Power electronics, embedded systems, robotics, industrial automation, and sensors and instrumentation.

What does a job look like?

We look at the job, agree a direction, build a prototype, then change it from what the tests show.

Can the details stay private?

Yes. Drawings and plant data stay inside the job. Email first if you want to talk before you share them.

Where are you based?

Pune, Maharashtra, India. Write to operations@sahastitwa.in. There is no phone number on this site.

Discuss a project

Tell us the engineering job.

Say which part you need: electronics, firmware, control, or the whole system. A sentence on the machine or the plant is enough to start.

Discuss a project keeps a copy with us. WhatsApp only opens a message on your side.